KITT / Nauticus Robotics, Inc. - Документы SEC, Годовой отчет, Доверенное заявление

Морская робототехника, Inc.

Основная статистика
CIK 1849820
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Nauticus Robotics, Inc.
SEC Filings (Chronological Order)
На этой странице представлен полный хронологический список документов SEC, за исключением документов о собственности, которые мы предоставляем в других местах.
September 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 3, 2025 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 3, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

September 2, 2025 424B3

Up to $1,300,000 Common Stock NAUTICUS ROBOTICS, INC.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-284675 PROSPECTUS SUPPLEMENT (to Prospectus Supplement dated July 18,2025) (to Prospectus Supplement dated June 30, 2025) (to Prospectus dated May 29, 2025) Up to $1,300,000 Common Stock NAUTICUS ROBOTICS, INC. This prospectus supplement is being filed to update, amend, and supplement certain information in the prospectus dated May 29, 2025 as

September 2, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 2, 2025 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 2, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

September 2, 2025 EX-99.1

Nauticus Robotics Announces 1-for-9 Reverse Stock Split HOUSTON – September 2, 2025. Nauticus Robotics, Inc. (NASDAQ: KITT, “Nauticus” or the “Company”) today announced that it will proceed with a 1-for-9 reverse stock split (“Reverse Split”) of its

nauticus-pressreleaserev Nauticus Robotics Announces 1-for-9 Reverse Stock Split HOUSTON – September 2, 2025.

September 2, 2025 EX-3.1

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF NAUTICUS ROBOTICS, INC. Nauticus Robotics, Inc., (the “Corporation”), a corporation duly organized and validly existing under the General Corporat

certificateofamendmentre Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF NAUTICUS ROBOTICS, INC. Nauticus Robotics, Inc., (the “Corporation”), a corporation duly organized and validly existing under the General Corporation Law of the State of Delaware (the “DGCL”), hereby files this Certificate of Amendment (this “Certificate of Amendment”) t

September 2, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 2, 2025 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 2, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

August 19, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 15, 2025 NAUTICUS ROBOTICS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 15, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

August 19, 2025 EX-3.1

Exhibit 3.1 AMENDMENT NO. 1 TO THE AMENDED AND RESTATED BY-LAWS OF NAUTICUS ROBOTICS, INC. This Amendment No. 1 to the Amended and Restated By-laws (as currently in effect prior to Amendment No. 1, the “By-laws”) of Nauticus Robotics, Inc., a Delawar

kitt-ex31toform8xkamendm Exhibit 3.1 AMENDMENT NO. 1 TO THE AMENDED AND RESTATED BY-LAWS OF NAUTICUS ROBOTICS, INC. This Amendment No. 1 to the Amended and Restated By-laws (as currently in effect prior to Amendment No. 1, the “By-laws”) of Nauticus Robotics, Inc., a Delaware corporation (the “Corporation”), is effective as of August 15, 2025. ARTICLE I, SECTION 1.6 of the By-laws entitled “Quorum

August 11, 2025 8-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 7, 2025 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 7, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

August 11, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 o TRANSITION REPORT PURSUANT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40611 NAUTICUS ROBOTIC

August 8, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 7, 2025 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 7, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

August 7, 2025 EX-3.1

Certificate of Designations of Rights and Preferences of Series B Convertible Preferred Stock of Nauticus Robotics, Inc

nauticus-codseriesbv6red Execution Version CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS NOT MATERIAL AND IS THE TYPE OF INFORMATION THAT THE REGISTRANT CUSTOMARILY AND ACTUALLY TREATS AS PRIVATE AND CONFIDENTIAL.

August 7, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 6, 2025 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 6, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

August 7, 2025 EX-10.1

Securities Purchase Agreement dated August 6, 2025, by and among Nauticus Robotics, Inc. and each of the investors listed on the Schedule of Buyers thereto.

nauticus-spapipepv6redac Execution Version CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS NOT MATERIAL AND IS THE TYPE OF INFORMATION THAT THE REGISTRANT CUSTOMARILY AND ACTUALLY TREATS AS PRIVATE AND CONFIDENTIAL.

July 28, 2025 EX-99.1

Nauticus Robotics Announces Interim CFO Transition Houston, TX, July 28, 2025 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in autonomous subsea robotics and software solutions, today announced that Jimena Begaries will assume the rol

a2025-0725executivechan Nauticus Robotics Announces Interim CFO Transition Houston, TX, July 28, 2025 – Nauticus Robotics, Inc.

July 28, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 25, 2025 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 25, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

July 21, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 18, 2025 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 18, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

July 18, 2025 424B3

Up to $1,400,000 Common Stock NAUTICUS ROBOTICS, INC.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-284675 PROSPECTUS SUPPLEMENT (to Prospectus Supplement dated June 30, 2025) (to Prospectus dated May 29, 2025) Up to $1,400,000 Common Stock NAUTICUS ROBOTICS, INC. This prospectus supplement is being filed to update, amend, and supplement certain information in the prospectus dated May 29, 2025 as supplemented by the prospectus supplement date

July 11, 2025 S-8

As filed with the Securities and Exchange Commission on July 11, 2025

As filed with the Securities and Exchange Commission on July 11, 2025 Registration No.

July 11, 2025 EX-FILING FEES

Calculation of Filing Fee Table

nauticus-2025sx8exhibit1 Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Nauticus Robotics, Inc.

July 1, 2025 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 30, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

June 30, 2025 424B3

Up to $663,814 Common Stock NAUTICUS ROBOTICS, INC.

424B3 1 kittprosupp6-062725.htm 424B3 Registration No. 333-284675 PROSPECTUS SUPPLEMENT (to Prospectus dated May 29, 2025) Up to $663,814 Common Stock NAUTICUS ROBOTICS, INC. We previously entered into an At The Market Offering Agreement (the “Sales Agreement”) with H.C. Wainwright & Co., LLC, or Wainwright, relating to shares of our common stock, $0.0001 par value per share, offered by this prosp

June 25, 2025 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 25, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

June 10, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

May 29, 2025 EX-99.2

1 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION On March 20, 2025, Nauticus Robotics, Inc., a Delaware corporation (the “Company” or “Nauticus”) consummated the acquisition of substantially all of the assets and certain specified liabi

1 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL INFORMATION On March 20, 2025, Nauticus Robotics, Inc.

May 29, 2025 EX-99.1

SEATREPID INTERNATIONAL, LLC Consolidated Financial Statements As of and for the years ended December 31, 2024 and 2023 With Report of Independent Auditors SEATREPID INTERNATIONAL, LLC CONSOLIDATED FINANCIAL STATEMENTS For the Years Ended December 31

SEATREPID INTERNATIONAL, LLC Consolidated Financial Statements As of and for the years ended December 31, 2024 and 2023 With Report of Independent Auditors SEATREPID INTERNATIONAL, LLC CONSOLIDATED FINANCIAL STATEMENTS For the Years Ended December 31, 2024 and 2023 TABLE OF CONTENTS PAGE Report of Independent Auditors 2 Consolidated Balance Sheets 4 Consolidated Statements of Operations 5 Consolidated Statements of Changes in Members’ Deficit 6 Consolidated Statements of Cash Flows 7 Notes to the Consolidated Financial Statements 8 Houston Office 3737 Buffalo Speedway Suite 1600 Houston, Texas 77098 713.

May 29, 2025 8-K/A

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 20, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

May 27, 2025 CORRESP

May 27, 2025 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Re: Nauticus Robotics, Inc. Registration Statement on Form S-3 (File No. 333-284675) Request for Acceleration of Effec

corresprequestforacceler May 27, 2025 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

May 16, 2025 S-3/A

As filed with the Securities and Exchange Commission on May 15, 2025

As filed with the Securities and Exchange Commission on May 15, 2025 Registration No.

May 15, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 15, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission Fi

May 15, 2025 EX-99.1

Nauticus Robotics Reports Strong Start to 2025 Revenue Momentum Builds; Strategic Acquisition Positions Company for Accelerated Growth HOUSTON, May 14, 2025 – Nauticus Robotics, Inc. (“Nauticus” or the “Company”) (NASDAQ: KITT), a trailblazer in subs

Nauticus Robotics Reports Strong Start to 2025 Revenue Momentum Builds; Strategic Acquisition Positions Company for Accelerated Growth HOUSTON, May 14, 2025 – Nauticus Robotics, Inc.

May 14, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 o TRANSITION REPORT PURSUAN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40611 NAUTICUS ROBOTI

April 30, 2025 ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR o TRANSITION REPORT PURSUANT TO SE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-40611 NAUTICUS ROBOTICS, INC. (

April 29, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

April 18, 2025 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: x Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) Definitive Proxy Stateme

April 16, 2025 EX-99.1

Nauticus Robotics Announces Results for Year-End 2024 HOUSTON, April 15, 2025 – Nauticus Robotics, Inc. (“Nauticus” or “Company) (NASDAQ: KITT), a leading innovator in subsea robotics and software, today announced its financial results for the year-e

Nauticus Robotics Announces Results for Year-End 2024 HOUSTON, April 15, 2025 – Nauticus Robotics, Inc.

April 16, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 15, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

April 15, 2025 10-Q/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1) (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 o T

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1) (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 0

April 15, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 o TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-40611 NAUTICU

April 15, 2025 EX-19.1

Insider Trading Policy

April 15, 2025 10-Q/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1) (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 o TRANS

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1) (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission

April 15, 2025 10-Q/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1) (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 o TRANSI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q/A (Amendment No. 1) (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission F

April 2, 2025 EX-10.1

Award Letter dated March 27, 2025

VIA HAND DELIVERY AND/OR EMAIL March 27, 2025 Dear John W. Gibson, Jr.: On behalf of the Board of Directors (the “Board”) of Nauticus Robotics, Inc. (the “Company”), I would like to thank you for your dedication and service to our Company. We all realize that the growth of our business to date, and our future as a public company, is dependent on the contributions made by our senior executives. To

April 2, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 27, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

March 31, 2025 NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check one): ☒ Form 10-K ☐ Form 20-F ☐ Form 11-K x Form 10-Q ☐Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: December 31, 2024 ☐Transition Report on Form 10-K ☐Transition Report on Form 20-F ☐Transition Report on Form 11-K ☐Transition Report on Form 10-Q For the Transition Period

March 25, 2025 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 20, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

March 25, 2025 EX-99.1

Nauticus Robotics Announces Early Closure of SeaTrepid International Acquisition HOUSTON, March 20, 2025 – Nauticus Robotics, Inc. (NASDAQ: KITT, “Nauticus”), a leading innovator in autonomous subsea robotics and software solutions, today announced a

Nauticus Robotics Announces Early Closure of SeaTrepid International Acquisition HOUSTON, March 20, 2025 – Nauticus Robotics, Inc.

March 25, 2025 EX-10.1

Amendment No. 1 to Asset Purchase Agreement, dated March 20, 2025, by and among Nauticus Robotics Inc., SeaTrepid International, L.L.C., SeaTrepid Deepsea LLC, Remote Inspection Technologies, L.L.C. and each of the signatories thereto.

CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) THE TYPE OF INFORMATION THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL AND HAS BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

March 19, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 13, 2025 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 13, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

March 5, 2025 EX-10.1

Asset Purchase Agreement, dated March 5, 2025, by and among Nauticus Robotics Inc., SeaTrepid International, L.L.C., SeaTrepid Deepsea LLC, Remote Inspection Technologies, L.L.C. and each of the signatories thereto.

EXECUTION VERSION CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) THE TYPE OF INFORMATION THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL AND HAS BEEN MARKED WITH “[***]” TO INDICATE WHERE OMISSIONS HAVE BEEN MADE.

March 5, 2025 EX-99.1

Nauticus Robotics Announces Intent to Acquire SeaTrepid International Combination Expands Addressable Market and Drives Operational Synergies HOUSTON, March 05, 2025 – Nauticus Robotics, Inc. (NASDAQ: KITT, “Nauticus”), a leading innovator in autonom

a2025-0304seatrepidacqu Nauticus Robotics Announces Intent to Acquire SeaTrepid International Combination Expands Addressable Market and Drives Operational Synergies HOUSTON, March 05, 2025 – Nauticus Robotics, Inc.

March 5, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 5, 2025 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): March 5, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

February 20, 2025 EX-99.1

Sent via electronic delivery February 18, 2025 Brie Charles Donohoe Advisory Associates LLC 9801 Washingtonian Blvd, Suite 340 Gaithersburg, MD 20878 RE: Nauticus Robotics, Inc. (Symbol: KITT) Nasdaq Listing Qualifications Hearings Docket No. NQ 6952

Sent via electronic delivery February 18, 2025 Brie Charles Donohoe Advisory Associates LLC 9801 Washingtonian Blvd, Suite 340 Gaithersburg, MD 20878 RE: Nauticus Robotics, Inc.

February 20, 2025 EX-99.2

Nauticus Robotics Regains Compliance with Nasdaq Listing Standards HOUSTON, February 20, 2025 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in autonomous subsea robotics and software, today announced that on February 18, 2025, it rece

Nauticus Robotics Regains Compliance with Nasdaq Listing Standards HOUSTON, February 20, 2025 – Nauticus Robotics, Inc.

February 20, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 20, 2025 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 20, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

February 12, 2025 CORRESP

February 12, 2025 VIA EDGAR Securities and Exchange Commission Chief, Office of Information Technology Division of Corporate Finance 100 F Street, NE Washington, D.C. 20549 Re: Nauticus Robotics, Inc. (“Nauticus” or the “Company”) (Filing No. 001-406

correspfilingdateadjreqk February 12, 2025 VIA EDGAR Securities and Exchange Commission Chief, Office of Information Technology Division of Corporate Finance 100 F Street, NE Washington, D.

February 12, 2025 CORRESP

February 12, 2025 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance Office of Technology 100 F Street, N.E. Washington, D.C. 20549 Attention: Mariam Mansaray Jan Woo Re: Nauticus Robotics, Inc. Registration Statement of For

responselettertoseccomme February 12, 2025 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance Office of Technology 100 F Street, N.

February 3, 2025 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Nauticus Robotics, Inc.

February 3, 2025 S-3

As filed with the Securities and Exchange Commission on February 3, 2025

As filed with the Securities and Exchange Commission on February 3, 2025 Registration No.

January 29, 2025 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 29, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 17, 2025 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 17, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 17, 2025 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

424B3 1 kitt-011525424b31.htm 424B3 Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 25 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the infor

January 17, 2025 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 32 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

January 16, 2025 424B3

Up to $7,338,975 Common Stock NAUTICUS ROBOTICS, INC.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-277034 PROSPECTUS SUPPLEMENT (to Prospectus Supplement dated January 13, 2025) (to Prospectus Supplement dated January 7, 2025) (to Prospectus Supplement dated June 12, 2024) (to Prospectus Supplement dated June 11, 2024) (to Prospectus Supplement dated May 20, 2024) (to Prospectus dated May 6, 2024) Up to $7,338,975 Common Stock NAUTICUS ROBOT

January 15, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 15, 2025 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 15, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 14, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 13, 2025 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 13, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 14, 2025 424B3

Up to $6,204,307 Common Stock NAUTICUS ROBOTICS, INC.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-277034 PROSPECTUS SUPPLEMENT (to Prospectus Supplement dated January 7, 2025) (to Prospectus Supplement dated June 12, 2024) (to Prospectus Supplement dated June 11, 2024) (to Prospectus Supplement dated May 20, 2024) (to Prospectus dated May 6, 2024) Up to $6,204,307 Common Stock NAUTICUS ROBOTICS, INC. This prospectus supplement is being file

January 7, 2025 424B3

Up to $6,646,516 Common Stock NAUTICUS ROBOTICS, INC.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-277034 PROSPECTUS SUPPLEMENT (to Prospectus Supplement dated June 12, 2024) (to Prospectus Supplement dated June 11, 2024) (to Prospectus Supplement dated May 20, 2024) (to Prospectus dated May 6, 2024) Up to $6,646,516 Common Stock NAUTICUS ROBOTICS, INC. This prospectus supplement is being filed to update, amend, and supplement certain inform

January 6, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 3, 2025 NAUTICUS ROBOTICS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 3, 2025 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

January 6, 2025 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Material Modification to Rights of Security Holders, Unregistered Sales of Equity Securities, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 27, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

December 27, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 27, 2024 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 27, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

December 27, 2024 EX-3.1

Certificate of Designation of Series A Convertible Preferred Stock of Nauticus Robotics, Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K filed on December 27, 2024).

Error! Unknown document property name. EXHIBIT 3.1 CERTIFICATE OF DESIGNATIONS OF RIGHTS AND PREFERENCES OF SERIES A CONVERTIBLE PREFERRED STOCK OF NAUTICUS ROBOTICS, INC. I, John W. Gibson, Jr., hereby certify that I am the President and Chief Executive Officer of Nauticus Robotics, Inc. (the “Company”), a corporation organized and existing under the Delaware General Corporation Law (the “DGCL”),

December 20, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

December 18, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

December 11, 2024 8-K

Unregistered Sales of Equity Securities, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 11, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

November 25, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: x Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

November 13, 2024 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: x Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

November 13, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 12, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

November 13, 2024 EX-99.1

Nauticus Robotics Announces Results for the Third Quarter of 2024 HOUSTON, November 12, 2024 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in subsea robotics and software, today announced its financial results for the quarter ended Se

Nauticus Robotics Announces Results for the Third Quarter of 2024 HOUSTON, November 12, 2024 – Nauticus Robotics, Inc.

November 12, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 o TRANSITION REPORT PUR

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-40611 NAUTICUS RO

November 12, 2024 EX-10.1

Offer Letter dated August 9, 2024, Between Nauticus Robotics, Inc. and John Symington

EXHIBIT 10.1 August 9, 2024 John Symington Re: Offer Letter Dear John: On behalf of Nauticus Robotics, Inc., a Texas corporation (“Nauticus”), I am delighted to confirm our offer to you for employment in the position of General Counsel of Nauticus. You shall report directly to the CEO of Nauticus. Your employment under this letter agreement (this “Agreement”) will be effective on August 12, 2024 s

November 5, 2024 EX-10.1

Form of Second Amendment and Exchange

EXHIBIT 10.1 SECOND AMENDMENT AND EXCHANGE AGREEMENT This Second Amendment and Exchange Agreement (the “Agreement”) is entered into as of the date set forth on the signature pages below, by and among Nauticus Robotics, Inc., a Delaware corporation (the “Company”) and the investor signatory hereto (the “Holder”), with reference to the following facts: A. Prior to the date hereof, the Company and th

November 5, 2024 EX-10.5

IP Security Agreement, dated as of November 4

EXHIBIT 10.5 INTELLECTUAL PROPERTY SECURITY AGREEMENT This Intellectual Property Security Agreement (as amended, amended and restated, supplemented or otherwise modified from time to time, the “Agreement”), dated as of November 4, 2024 is entered into by NAUTICUS ROBOTICS, INC. (F/K/A CLEANTECH ACQUISITION CORP.), a Delaware corporation (together with its successors and assigns, the “Company”), NA

November 5, 2024 EX-10.3

Form of Original Issue Discount Senior Secured Convertible Debenture Due 2026 (incorporated by reference to Exhibit 10.3 to the Company’s Form 8-K filed on November 5, 2024)

EXHIBIT 10.3 NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO AN EFFECTIVE REGIS

November 5, 2024 EX-10.2

Form of Securities Purchase Agreement dated

EXHIBIT 10.2 SECURITIES PURCHASE AGREEMENT This SECURITIES PURCHASE AGREEMENT (the “Agreement”), dated as of November 4, 2024, is by and among Nauticus Robotics, Inc., a Delaware corporation, with offices located at 17146 Feathercraft Lane, Suite 450, Webster, TX 77598 (the “Company”), and each of the investors listed on the Schedule of Buyers attached hereto (individually, a “Buyer” and collectiv

November 5, 2024 EX-99.2

EXHIBIT 99.2 Nauticus Robotics Completes Initial 2024 Gulf of Mexico Field Survey Work for Shell HOUSTON, November 05, 2024 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in autonomous subsea robotics and software, successfully complet

EXHIBIT 99.2 Nauticus Robotics Completes Initial 2024 Gulf of Mexico Field Survey Work for Shell HOUSTON, November 05, 2024 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in autonomous subsea robotics and software, successfully completed its initial 2024 Gulf of Mexico (GOM) survey scope for Shell Exploration and Production Inc (“Shell”), a subsidiary of Shell plc (NYSE: SHEL), an i

November 5, 2024 EX-10.8

Intercreditor agreement, dated as of November 4,

EXHIBIT 10.8 INTERCREDITOR AGREEMENT Dated as of November 4, 2024 among ATW SPECIAL SITUATIONS MANAGEMENT LLC, as Super Senior Collateral Agent, and ACQUIOM AGENCY SERVICES LLC, as Subordinated Lien Collateral Agent, and acknowledged and agreed to by NAUTICUS ROBOTICS, INC., as the Company, and the other Grantors referred to herein 168776.01000/150935546v.3 TABLE OF CONTENTS Page 1.1 Defined Terms

November 5, 2024 EX-10.7

Intercreditor agreement, dated as of November 4

EXHIBIT 10.7 INTERCREDITOR AGREEMENT Dated as of November 4, 2024 among ATW SPECIAL SITUATIONS MANAGEMENT LLC, as Super Senior Collateral Agent, and ATW SPECIAL SITUATIONS MANAGEMENT LLC, as Subordinated Lien Collateral Agent, and acknowledged and agreed to by NAUTICUS ROBOTICS, INC., as the Company, and the other Grantors referred to herein 168776.01000/150935551v.4 TABLE OF CONTENTS Page 1.1 Def

November 5, 2024 EX-10.6

Subsidiary Guarantee, dated as of November 4, 2024, by Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, and Nauticus Robotics USA LLC,

EXHIBIT 10.6 SUBSIDIARY GUARANTEE This SUBSIDIARY GUARANTEE (this “Guarantee”) is made as of November 4, 2024, by NAUTICUS ROBOTICS HOLDINGS, INC. (F/K/A NAUTICUS ROBOTICS, INC.), a Texas corporation (together with its successors and assigns, “Nauticus Sub”), NAUTIWORKS LLC, a Delaware limited liability company (together with its successors and assigns, “NautiWorks”), NAUTICUS ROBOTICS FLEET LLC,

November 5, 2024 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Unregistered Sales of Equity Securities, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 4, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

November 5, 2024 EX-10.4

Pledge and Security Agreement, dated as of

EXHIBIT 10.4 PLEDGE AND SECURITY AGREEMENT PLEDGE AND SECURITY AGREEMENT, dated as of November 4, 2024 (this “Agreement”), among ATW SPECIAL SITUATIONS MANAGEMENT LLC, as collateral agent (the “Agent”) on behalf of the Buyers now or hereafter party to the Securities Purchase Agreement (defined below), NAUTICUS ROBOTICS, INC. (F/K/A CLEANTECH ACQUISITION CORP.), a Delaware corporation (together wit

November 5, 2024 EX-10.9

Intercreditor agreement, dated as of November 4, 2024, by and among the Collateral Agent and ATW Special Situations I LLC and acknowledged and agreed to by the Debtors.

EXHIBIT 10.9 INTERCREDITOR AGREEMENT Dated as of November 4, 2024 among ATW SPECIAL SITUATIONS MANAGEMENT LLC, as Super Senior Collateral Agent, and ATW SPECIAL SITUATIONS I LLC, as Subordinated Lien Collateral Agent, and acknowledged and agreed to by NAUTICUS ROBOTICS, INC., as the Company, and the other Grantors referred to herein 168776.01000/150935587v.4 TABLE OF CONTENTS Page 1.1 Defined Term

November 5, 2024 EX-99.1

EXHIBIT 99.1 Nauticus Robotics Debtholders Agree to Exchange $33M of Debt to Equity HOUSTON, November 05, 2024 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in autonomous subsea robotics and software, announces that it has entered int

EXHIBIT 99.1 Nauticus Robotics Debtholders Agree to Exchange $33M of Debt to Equity HOUSTON, November 05, 2024 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in autonomous subsea robotics and software, announces that it has entered into an agreement with existing debtholders to convert $33M dollars of debt into equity through a preferred stock exchange. The company anticipates that

September 20, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 31 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

September 20, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 19, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commiss

September 20, 2024 EX-99.1

Exhibit 99.1 Nauticus Robotics Announces Notification of NASDAQ Listing Extension HOUSTON, September 19, 2024 – Nauticus Robotics Inc. (NASDAQ:KITT) a leading innovator in autonomous subsea robotics and software, today announced receipt of a letter f

Exhibit 99.1 Nauticus Robotics Announces Notification of NASDAQ Listing Extension HOUSTON, September 19, 2024 – Nauticus Robotics Inc. (NASDAQ:KITT) a leading innovator in autonomous subsea robotics and software, today announced receipt of a letter from the Nasdaq Stock Market LLC (“Nasdaq”) approving an extension of time to regain compliance with all listing standards. The letter received from Na

September 20, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 24 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

September 19, 2024 EX-99.1

Nauticus Robotics Announces Second Round of Aquanaut Mark 2 Deepwater Qualification Testing

Exhibit 99.1 Nauticus Robotics Announces Second Round of Aquanaut Mark 2 Deepwater Qualification Testing HOUSTON, Sept. 17, 2024 /PRNewswire/ - Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in autonomous subsea robotics and software, began its second round of qualification testing of its flagship underwater vehicle, Aquanaut Mark 2, in the Gulf of Mexico (GOM). Vehicle 2 will be used

September 19, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 17, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commiss

September 6, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 30 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

September 6, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 23 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

September 3, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 2, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

September 3, 2024 EX-99.1

ATW Special Situations I LLC ONE PENN 1 Pennsylvania Plaza, Suite 4810 New York, N.Y. 10119

EXHIBIT 99.1 ATW Special Situations I LLC ONE PENN 1 Pennsylvania Plaza, Suite 4810 New York, N.Y. 10119 September 2, 2024 Nauticus Robotics, Inc. 17146 Feathercraft Lane, Suite 450 Webster, Texas 77598 Attention: John W. Gibson, Jr., CEO Re: Proposal by ATW Special Situations I LLC to Exchange Certain Securities of Nauticus Robotics, Inc. Dear Mr. Gibson: In accordance with our recent discussions

August 23, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 29 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

August 23, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 22 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

August 20, 2024 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 14, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

August 14, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 o TRANSITION REPORT PURSUANT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-4061

August 14, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 13, 2024 NAUTICUS ROBOTICS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 13, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

August 14, 2024 EX-99.1

NAUTICUS ROBOTICS, INC. UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

Exhibit 99.1 Nauticus Robotics Announces Results for the Second Quarter of 2024 HOUSTON, Aug. 13, 2024 /PRNewswire/ - Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in subsea robotics and software, today announced its financial results for the quarter ended June 30, 2024. "I would like to thank our existing lenders for their continued support. Their steady conversion of warrants and c

August 9, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 21 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

August 9, 2024 EX-99.1

Nauticus Robotics Enters Aquanaut Mark 2 Testing Partnership with FAU

Exhibit 99.1 Nauticus Robotics Enters Aquanaut Mark 2 Testing Partnership with FAU HOUSTON, August 8, 2024 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in subsea robotics and software, announces a partnership with Florida Atlantic University (FAU) for further testing of its flagship underwater vehicle, Aquanaut Mark 2. Nauticus has contracted with FAU to perform Aquanaut Mark 2 ve

August 9, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 28 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

August 9, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 8, 2024 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): August 8, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

August 2, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 29, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

August 2, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 20 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

August 2, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 27 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

July 26, 2024 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 24, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

July 18, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 18, 2024 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 18, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

July 18, 2024 EX-99.1

Nauticus Robotics Invoices Phase I: Concept Validation Under Contract for Aquanaut Mark 2

Exhibit 99.1 Nauticus Robotics Invoices Phase I: Concept Validation Under Contract for Aquanaut Mark 2 HOUSTON, July 18, 2024 – Nauticus Robotics, Inc. (NASDAQ: KITT), a leading innovator in subsea robotics and software, announces the successful completion and invoicing of Phase I in its transformative four-phase contract with Brazil's largest offshore oil & gas operator. This milestone concludes

July 18, 2024 EX-99.1

Nauticus Robotics Announces Transformative 1-for-36 Reverse Stock Split

Exhibit 99.1 Nauticus Robotics Announces Transformative 1-for-36 Reverse Stock Split HOUSTON – July 18, 2024. Nauticus Robotics, Inc. (“Nauticus” or the “Company”) (NASDAQ: KITT) today announced that it will proceed with a 1-for-36 reverse stock split ("Reverse Split") of its outstanding shares of common stock (the "Common Stock") following approval by its Board of Directors. This ratio is within

July 18, 2024 EX-3.1

Certificate of Amendment

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO THE SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF NAUTICUS ROBOTICS, INC. Nauticus Robotics, Inc., (the “Corporation”), a corporation duly organized and validly existing under the General Corporation Law of the State of Delaware (the “DGCL”), hereby files this Certificate of Amendment (this “Certificate of Amendment”) to the Amended and Restate

July 18, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 18, 2024 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): July 18, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

July 16, 2024 S-8

As filed with the Securities and Exchange Commission on July 15, 2024

As filed with the Securities and Exchange Commission on July 15, 2024 Registration No.

July 16, 2024 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Nauticus Robotics, Inc.

June 25, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 26 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

June 25, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 19 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

June 18, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 17, 2024 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 17, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

June 13, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 12, 2024 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): June 12, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

June 12, 2024 424B3

Up to $9,858,269 Common Stock NAUTICUS ROBOTICS, INC.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-277034 PROSPECTUS SUPPLEMENT (to Prospectus Supplement dated June 11, 2024) (to Prospectus Supplement dated May 20, 2024) (to Prospectus dated May 6, 2024) Up to $9,858,269 Common Stock NAUTICUS ROBOTICS, INC. This prospectus supplement is being filed to update, amend, and supplement certain information in the prospectus dated May 6, 2024 as su

June 11, 2024 424B3

Up to $8,355,844 Common Stock NAUTICUS ROBOTICS, INC.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-277034 PROSPECTUS SUPPLEMENT (to Prospectus Supplement dated May 20, 2024) (to Prospectus dated May 6, 2024) Up to $8,355,844 Common Stock NAUTICUS ROBOTICS, INC. This prospectus supplement is being filed to update, amend, and supplement certain information in the prospectus dated May 6, 2024 as supplemented by the prospectus supplement dated M

June 3, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 18 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

June 3, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 25 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

May 30, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 29, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission Fi

May 28, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 17 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

May 28, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 24 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

May 28, 2024 8-K

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 28, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission Fi

May 22, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

May 21, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 23 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425

May 21, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 16 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained i

May 20, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

May 20, 2024 424B3

Up to $5,430,449 Common Stock NAUTICUS ROBOTICS, INC.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-277034 PROSPECTUS SUPPLEMENT (to Prospectus dated May 6, 2024) Up to $5,430,449 Common Stock NAUTICUS ROBOTICS, INC. We have entered into an At The Market Offering Agreement, or the Sales Agreement, with H.C. Wainwright & Co., LLC, or Wainwright, relating to shares of our common stock, $0.0001 par value per share, offered by this prospectus sup

May 20, 2024 EX-10.1

At the Market Offering Agreement dated May 20, 2024.

Exhibit 10.1 AT THE MARKET OFFERING AGREEMENT May 20, 2024 H.C. Wainwright & Co., LLC 430 Park Avenue New York, New York 10022 Ladies and Gentlemen: Nauticus Robotics, Inc., a corporation organized under the laws of Delaware (the “Company”), confirms its agreement (this “Agreement”) with H.C. Wainwright & Co., LLC (the “Manager”) as follows: 1.Definitions. The terms that follow, when used in this

May 20, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 20, 2024 NAUTICUS ROBOTICS, I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 20, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission Fi

May 14, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 13, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission Fi

May 14, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 o TRANSITION REPORT PURSUAN

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) x QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-406

May 14, 2024 EX-99.1

Nauticus Robotics Announces Results for the First Quarter of 2024 HOUSTON – May 13, 2024. Nauticus Robotics, Inc. (“Nauticus” or the “Company”) (NASDAQ: KITT) today announced its financial results for the quarter ended March 31, 2024. “We have succes

Nauticus Robotics Announces Results for the First Quarter of 2024 HOUSTON – May 13, 2024.

May 8, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 22 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

May 8, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 15 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

May 6, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 14 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Proxy Statem

May 6, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 21 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

May 3, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 13 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Proxy Statem

May 3, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 20 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

May 2, 2024 CORRESP

May 2, 2024

May 2, 2024 VIA EDGAR United States Securities and Exchange Commission Division of Corporation Finance Office of Technology 100 F Street, N.

May 1, 2024 EX-10.1

First Amendment to Senior Secured Term Loan Agreement dated May 1, 2024.

Exhibit 10.1 FIRST AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT THIS FIRST AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT (this “Agreement”) is entered into as of May 1, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), the undersigned guarantors (the “Guarantors” and together with the Company, collectively, the “Group Members” and

May 1, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 1, 2024 NAUTICUS ROBOTICS, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 1, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission Fil

April 30, 2024 S-3/A

As filed with the Securities and Exchange Commission on April 30, 2024

As filed with the Securities and Exchange Commission on April 30, 2024 Registration No.

April 29, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

April 29, 2024 ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 o TRANSITION REPORT PURSUANT TO SECTI

April 29, 2024 Stakeholders, While a CEO letter typically only addresses shareholders, I would like to depart from that tradition and address a broader group of Nauticus Robotics stakeholders.

April 29, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 19 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

April 29, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 12 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

April 26, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

April 22, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 16, 2024 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 16, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission

April 17, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 11 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained i

April 17, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 18 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425

April 17, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 10 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repo

April 17, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 17 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

April 15, 2024 SC 13D/A

KITT / Nauticus Robotics, Inc. / Berka Angela - AMENDMENT NO. 1 TO SCHEDULE 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1) Nauticus Robotics, Inc. (Name of Issuer) Common stock, par value $0.0001 per share (Title of Class of Securities) Common stock: 63911H 108 (CUSIP Number) 17146 Feathercraft Lane, Suite 450 Webster, TX 77598 (281) 942-9069 (Name, Address and Telephone Numb

April 12, 2024 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant x Filed by a Party other than the Registrant ¨ Check the appropriate box: x Preliminary Proxy Statement ¨ Confidential, for use of the Commission only (as permitted by Rule 14a-6(e)(2)) ¨ Definitive Proxy State

April 10, 2024 EX-97.1

Nauticus Robotics, Inc. Clawback Policy

Nauticus Robotics, Inc. Dodd-Frank Restatement Recoupment Policy (Adopted and Approved on November 7, 2023) 1. Introduction The Board of Directors (the “Board”) of Nauticus Robotics, Inc. (the “Company”) has determined that it is in the best interests of the Company to adopt this policy providing for the recoupment by the Company of certain Incentive-Based Compensation paid to Executives Officers

April 10, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 o TRANSITION REPORT PURSUANT TO SECTI

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 001-40611 NAUTICU

April 10, 2024 EX-99.1

Nauticus Robotics Tests Aquanaut Mk2 Vehicle, Announces 2023 Results HOUSTON – April 9, 2024. Nauticus Robotics, Inc. (“Nauticus” or the “Company”) (NASDAQ: KITT) today announced preliminary testing results for its Aquanaut Mk2 vehicle and financial

Nauticus Robotics Tests Aquanaut Mk2 Vehicle, Announces 2023 Results HOUSTON – April 9, 2024.

April 10, 2024 EX-4.8

Description of Registrant’s Securities

Exhibit 4.8 DESCRIPTION OF REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 DESCRIPTION OF CAPITAL STOCK The following summary sets forth the material terms of our securities. The following summary is not intended to be a complete summary of the rights and preferences of such securities, and is qualified by reference to the Charter and the amended an

April 10, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 9, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

April 8, 2024 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons below agree to the joint filing on behalf of each of them of a Statement on Schedule 13G, and any and all amendments thereto, with regard to the beneficial ownership of shares of common stock, par value $0.0001 per share, of Nauticus Robotics, Inc., a D

April 8, 2024 SC 13D/A

KITT / Nauticus Robotics, Inc. / SCHLUMBERGER LIMITED/NV - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No.

April 8, 2024 SC 13G

KITT / Nauticus Robotics, Inc. / SCHLUMBERGER LIMITED/NV - SC 13G Passive Investment

SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 NAUTICUS ROBOTICS, INC. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 63911H 108 (CUSIP Number) April 4, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

April 4, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 4, 2024 NAUTICUS ROBOTICS,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): April 4, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commission F

April 4, 2024 EX-99.1

Nauticus Robotics Announces Timing of Release of 2023 Earnings and Investor Conference Call

Exhibit 99.1 Nauticus Robotics Announces Timing of Release of 2023 Earnings and Investor Conference Call HOUSTON – April 4, 2024 Nauticus Robotics, Inc. (“Nauticus” or the “Company”) (NASDAQ: KITT) today announced the Company’s schedule for releasing its fourth quarter and year end financial and operating results for the period ended December 31, 2023. The Company plans to release its fourth quart

April 3, 2024 SC 13G

KITT / Nauticus Robotics, Inc. / ATW Partners Opportunities Management, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 0)* Nauticus Robotics, Inc. (Name of Issuer) Common Stock, par value $0.0001 (Title of Class of Securities) 63911H108 (CUSIP Number) March 26, 2024 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursua

April 1, 2024 NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check one): ☒ Form 10-K ☐ Form 20-F ☐ Form 11-K x Form 10-Q ☐Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: December 31, 2023 ☐Transition Report on Form 10-K ☐Transition Report on Form 20-F ☐Transition Report on Form 11-K ☐Transition Report on Form 10-Q For the Transition Period

February 29, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 16 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

February 29, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 9 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repor

February 22, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 15, 2024 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 15, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

February 22, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 15, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

February 22, 2024 EX-10.1

Employment Agreement dated February 21, 2024 between John W. Gibson Jr. and Nauticus Robotics, Inc.

Exhibit 10.1 EMPLOYMENT AGREEMENT This Employment Agreement (this “Agreement”), entered into on February 21, 2024 (“Effective Date”), is made by and between John W. Gibson, Jr. (the “Executive”) and Nauticus Robotics, Inc., a Delaware corporation (together with any of its subsidiaries and Affiliates as shall employ the Executive from time to time, and any and all successors thereto, the “Company”)

February 22, 2024 EX-10.1

Employment Agreement dated February 21, 2024 between John W. Gibson Jr. and Nauticus Robotics, Inc.

Exhibit 10.1 EMPLOYMENT AGREEMENT This Employment Agreement (this “Agreement”), entered into on February 21, 2024 (“Effective Date”), is made by and between John W. Gibson, Jr. (the “Executive”) and Nauticus Robotics, Inc., a Delaware corporation (together with any of its subsidiaries and Affiliates as shall employ the Executive from time to time, and any and all successors thereto, the “Company”)

February 13, 2024 EX-FILING FEES

Calculation of Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Nauticus Robotics, Inc.

February 13, 2024 S-3

As filed with the Securities and Exchange Commission on February 12, 2024

As filed with the Securities and Exchange Commission on February 12, 2024 Registration No.

February 6, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 15 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

February 6, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 8 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repor

February 5, 2024 EX-10.1

Senior Secured Term Loan Agreement, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., ATW Special Situations Management LLC, as collateral agent and lender, and the lenders party thereto

Exhibit 10.1 EXECUTION VERSION Senior secured term loan Agreement nauticus robotics, inc. This SENIOR SECURED TERM LOAN AGREEMENT dated as of January 30, 2024 (this “Agreement”), is by and among Nauticus Robotics, Inc. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (together with its successors and permitted assigns, the “Company”), having its principal place of business at 17146 Feat

February 5, 2024 EX-10.1

Senior Secured Term Loan Agreement, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., ATW Special Situations Management LLC, as collateral agent and lender, and the lenders party thereto

Exhibit 10.1 EXECUTION VERSION Senior secured term loan Agreement nauticus robotics, inc. This SENIOR SECURED TERM LOAN AGREEMENT dated as of January 30, 2024 (this “Agreement”), is by and among Nauticus Robotics, Inc. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (together with its successors and permitted assigns, the “Company”), having its principal place of business at 17146 Feat

February 5, 2024 EX-10.7

Second Amendment to Senior Secured Term Loan Agreement, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, ATW Special Situations II LLC, ATW Special Situations I LLC, and Material Impact Fund II, L.P.

Exhibit 10.7 EXECUTION VERSION SECOND AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT THIS SECOND AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT (this “Amendment”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), the undersigned guarantors (the “Guarantors” and together with the Company, collectively

February 5, 2024 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Unregistered Sales of Equity Securities, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 30, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

February 5, 2024 EX-10.2

Pledge and Security Agreement, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, and ATW Special Situations Management LLC, as collateral agent

Exhibit 10.2 EXECUTION VERSION PLEDGE AND SECURITY AGREEMENT PLEDGE AND SECURITY AGREEMENT, dated as of January 30, 2024 (this “Agreement”), among ATW Special Situations Management LLC, as collateral agent (the “Agent”) on behalf of the lenders now or hereafter party to the Loan Agreement (defined below), NAUTICUS ROBOTICS, INC. (F/K/A CLEANTECH ACQUISITION CORP.), a Delaware corporation (together

February 5, 2024 EX-10.7

Second Amendment to Senior Secured Term Loan Agreement, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, ATW Special Situations II LLC, ATW Special Situations I LLC, and Material Impact Fund II, L.P.

Exhibit 10.7 EXECUTION VERSION SECOND AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT THIS SECOND AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT (this “Amendment”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), the undersigned guarantors (the “Guarantors” and together with the Company, collectively

February 5, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 30, 2024 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 30, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

February 5, 2024 EX-10.9

Form of Amendment and Exchange Agreement

Exhibit 10.9 EXECUTION VERSION AMENDMENT AND EXCHANGE AGREEMENT THIS AGREEMENT AND EXCHANGE AGREEMENT (this “Agreement”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), NAUTICUS ROBOTICS HOLDINGS, INC. (f/k/a Nauticus Robotics, Inc.), a Texas corporation (the “Nauticus Sub”), NAUTIWORKS LLC, a Delawa

February 5, 2024 EX-10.3

Intellectual Property Security Agreement, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, and ATW Special Situations Management LLC, as collateral agent

Exhibit 10.3 EXECUTION VERSION INTELLECTUAL PROPERTY SECURITY AGREEMENT This Intellectual Property Security Agreement (as amended, amended and restated, supplemented or otherwise modified from time to time, the “Agreement”), dated as of January 30, 2024 is entered into by NAUTICUS ROBOTICS, INC. (F/K/A CLEANTECH ACQUISITION CORP.), a Delaware corporation (together with its successors and assigns,

February 5, 2024 EX-10.11

Nauticus Second Lien Restructuring Agreement, entered into as of January 31, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, and SLS Family Irrevocable Trust

Exhibit 10.11 EXECUTION VERSION NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT THIS NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT (this “Agreement”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), NAUTICUS ROBOTICS HOLDINGS, INC. (f/k/a Nauticus Robotics, Inc.), a Texas corporation (the “Nauticus Sub”),

February 5, 2024 EX-10.10

Form of Original Issue Discount Exchanged Senior Secured Convertible Debenture Due September 9, 2026

Exhibit 10.10 Execution Version NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO

February 5, 2024 EX-10.8

Second Agreement Regarding Incremental Loans, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, ATW Special Situations II LLC, and Material Impact Fund II, L.P.

Exhibit 10.8 EXECUTION VERSION SECOND AGREEMENT REGARDING INCREMENTAL LOANS THIS Second agreement REGARDING incremental loanS (this “Agreement”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), the undersigned guarantors (the “Guarantors” and together with the Company, collectively, the “Group Members

February 5, 2024 EX-10.4

Subsidiary Guarantee, dated as of January 30, 2024, by Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, and Nauticus Robotics USA LLC, and acknowledged and agreed to by Nauticus Robotics, Inc.

Exhibit 10.4 EXECUTION VERSION SUBSIDIARY GUARANTEE This SUBSIDIARY GUARANTEE (this “Guarantee”) is made as of January 30, 2024, by NAUTICUS ROBOTICS HOLDINGS, INC. (F/K/A NAUTICUS ROBOTICS, INC.), a Texas corporation (together with its successors and assigns, “Nauticus Sub”), NAUTIWORKS LLC, a Delaware limited liability company (together with its successors and assigns, “NautiWorks”), NAUTICUS RO

February 5, 2024 EX-99.1

Nauticus Robotics Raises $12M in Funding to Execute 2024 Goals, including Industry-changing ‘Augmented Autonomy’ for Subsea Robots

Exhibit 99.1 Nauticus Robotics Raises $12M in Funding to Execute 2024 Goals, including Industry-changing ‘Augmented Autonomy’ for Subsea Robots HOUSTON – Feb.5, 2024 Nauticus Robotics (NASDAQ: KITT), a leading developer of subsea robots and software, announces securing over $12M net today, part of a second tranche of investment. The new investment will expedite certification of Nauticus’ flagship

February 5, 2024 EX-10.6

Intercreditor Agreement, dated as of January 30, 2024, by and between ATW Special Situations Management LLC, as 2024 first lien collateral agent, ATW Special situations I LLC, as second lien collateral agent, and acknowledged by Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC

Exhibit 10.6 EXECUTION VERSION INTERCREDITOR AGREEMENT Dated as of January 30, 2024 among ATW Special Situations Management LLC, as 2024 First Lien Collateral Agent, and ATW Special situations i llc, as Second Lien Collateral Agent, and acknowledged and agreed to by NAUTICUS ROBOTICS, INC., as the Company, and the other Grantors referred to herein TABLE OF CONTENTS Page Section 1. Definitions 2 1.

February 5, 2024 EX-10.3

Intellectual Property Security Agreement, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, and ATW Special Situations Management LLC, as collateral agent

Exhibit 10.3 EXECUTION VERSION INTELLECTUAL PROPERTY SECURITY AGREEMENT This Intellectual Property Security Agreement (as amended, amended and restated, supplemented or otherwise modified from time to time, the “Agreement”), dated as of January 30, 2024 is entered into by NAUTICUS ROBOTICS, INC. (F/K/A CLEANTECH ACQUISITION CORP.), a Delaware corporation (together with its successors and assigns,

February 5, 2024 EX-10.5

Pari Passu Intercreditor Agreement, dated as of January 30, 2024, by and among ATW Special Situations Management LLC, as collateral agent for the lenders under the Term Loan Agreement, Acquiom Agency Services LLC, as collateral agent for the lenders under the 2023 Term Loan Agreement, and Nauticus Robotics, Inc., and Nauticus Robotics Holdings, Inc., as grantors

Exhibit 10.5 EXECUTION VERSION PARI PASSU INTERCREDITOR AGREEMENT Dated as of January 30, 2024 among Nauticus Robotics, Inc. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation as Borrower, and the Grantors from time to time party hereto, ATW Special Situations Management LLC, as the Credit Agreement Collateral Agent for the Credit Agreement Secured Parties, and Acquiom Agency Services LLC

February 5, 2024 EX-10.12

Nauticus Second Lien Restructuring Agreement, entered into as of January 31, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, and Material Impact Fund II, L.P.

Exhibit 10.12 EXECUTION VERSION NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT THIS NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT (this “Agreement”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), NAUTICUS ROBOTICS HOLDINGS, INC. (f/k/a Nauticus Robotics, Inc.), a Texas corporation (the “Nauticus Sub”),

February 5, 2024 EX-10.4

Subsidiary Guarantee, dated as of January 30, 2024, by Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, and Nauticus Robotics USA LLC, and acknowledged and agreed to by Nauticus Robotics, Inc.

Exhibit 10.4 EXECUTION VERSION SUBSIDIARY GUARANTEE This SUBSIDIARY GUARANTEE (this “Guarantee”) is made as of January 30, 2024, by NAUTICUS ROBOTICS HOLDINGS, INC. (F/K/A NAUTICUS ROBOTICS, INC.), a Texas corporation (together with its successors and assigns, “Nauticus Sub”), NAUTIWORKS LLC, a Delaware limited liability company (together with its successors and assigns, “NautiWorks”), NAUTICUS RO

February 5, 2024 EX-10.5

Pari Passu Intercreditor Agreement, dated as of January 30, 2024, by and among ATW Special Situations Management LLC, as collateral agent for the lenders under the Term Loan Agreement, Acquiom Agency Services LLC, as collateral agent for the lenders under the 2023 Term Loan Agreement, and Nauticus Robotics, Inc., and Nauticus Robotics Holdings, Inc., as grantors

Exhibit 10.5 EXECUTION VERSION PARI PASSU INTERCREDITOR AGREEMENT Dated as of January 30, 2024 among Nauticus Robotics, Inc. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation as Borrower, and the Grantors from time to time party hereto, ATW Special Situations Management LLC, as the Credit Agreement Collateral Agent for the Credit Agreement Secured Parties, and Acquiom Agency Services LLC

February 5, 2024 EX-10.2

Pledge and Security Agreement, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, and ATW Special Situations Management LLC, as collateral agent

Exhibit 10.2 EXECUTION VERSION PLEDGE AND SECURITY AGREEMENT PLEDGE AND SECURITY AGREEMENT, dated as of January 30, 2024 (this “Agreement”), among ATW Special Situations Management LLC, as collateral agent (the “Agent”) on behalf of the lenders now or hereafter party to the Loan Agreement (defined below), NAUTICUS ROBOTICS, INC. (F/K/A CLEANTECH ACQUISITION CORP.), a Delaware corporation (together

February 5, 2024 EX-10.6

Intercreditor Agreement, dated as of January 30, 2024, by and between ATW Special Situations Management LLC, as 2024 first lien collateral agent, ATW Special situations I LLC, as second lien collateral agent, and acknowledged by Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC

Exhibit 10.6 EXECUTION VERSION INTERCREDITOR AGREEMENT Dated as of January 30, 2024 among ATW Special Situations Management LLC, as 2024 First Lien Collateral Agent, and ATW Special situations i llc, as Second Lien Collateral Agent, and acknowledged and agreed to by NAUTICUS ROBOTICS, INC., as the Company, and the other Grantors referred to herein TABLE OF CONTENTS Page Section 1. Definitions 2 1.

February 5, 2024 EX-10.8

Second Agreement Regarding Incremental Loans, dated as of January 30, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, ATW Special Situations II LLC, and Material Impact Fund II, L.P.

Exhibit 10.8 EXECUTION VERSION SECOND AGREEMENT REGARDING INCREMENTAL LOANS THIS Second agreement REGARDING incremental loanS (this “Agreement”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), the undersigned guarantors (the “Guarantors” and together with the Company, collectively, the “Group Members

February 5, 2024 EX-10.12

Nauticus Second Lien Restructuring Agreement, entered into as of January 31, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, and Material Impact Fund II, L.P.

Exhibit 10.12 EXECUTION VERSION NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT THIS NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT (this “Agreement”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), NAUTICUS ROBOTICS HOLDINGS, INC. (f/k/a Nauticus Robotics, Inc.), a Texas corporation (the “Nauticus Sub”),

February 5, 2024 EX-10.9

Form of Amendment and Exchange Agreement

Exhibit 10.9 EXECUTION VERSION AMENDMENT AND EXCHANGE AGREEMENT THIS AGREEMENT AND EXCHANGE AGREEMENT (this “Agreement”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), NAUTICUS ROBOTICS HOLDINGS, INC. (f/k/a Nauticus Robotics, Inc.), a Texas corporation (the “Nauticus Sub”), NAUTIWORKS LLC, a Delawa

February 5, 2024 EX-10.10

Form of Original Issue Discount Exchanged Senior Secured Convertible Debenture Due September 9, 2026

Exhibit 10.10 Execution Version NEITHER THIS SECURITY NOR THE SECURITIES INTO WHICH THIS SECURITY IS CONVERTIBLE HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF ANY STATE IN RELIANCE UPON AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND, ACCORDINGLY, MAY NOT BE OFFERED OR SOLD EXCEPT PURSUANT TO

February 5, 2024 EX-10.11

Nauticus Second Lien Restructuring Agreement, entered into as of January 31, 2024, by and among Nauticus Robotics, Inc., Nauticus Robotics Holdings, Inc., NautiWorks LLC, Nauticus Robotics Fleet LLC, Nauticus Robotics USA LLC, and SLS Family Irrevocable Trust

Exhibit 10.11 EXECUTION VERSION NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT THIS NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT (this “Agreement”) is entered into as of January 30, 2024, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), NAUTICUS ROBOTICS HOLDINGS, INC. (f/k/a Nauticus Robotics, Inc.), a Texas corporation (the “Nauticus Sub”),

February 5, 2024 EX-99.1

Nauticus Robotics Raises $12M in Funding to Execute 2024 Goals, including Industry-changing ‘Augmented Autonomy’ for Subsea Robots

Exhibit 99.1 Nauticus Robotics Raises $12M in Funding to Execute 2024 Goals, including Industry-changing ‘Augmented Autonomy’ for Subsea Robots HOUSTON – Feb.5, 2024 Nauticus Robotics (NASDAQ: KITT), a leading developer of subsea robots and software, announces securing over $12M net today, part of a second tranche of investment. The new investment will expedite certification of Nauticus’ flagship

February 2, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 7 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repor

February 2, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 14 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

February 1, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 28, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

February 1, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 28, 2024 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 28, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 29, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 6 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repor

January 29, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 13 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

January 26, 2024 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 22, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 26, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 22, 2024 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 22, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 22, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 5 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repor

January 22, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 12 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

January 19, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 12, 2024 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 12, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 19, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 12, 2024 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 12, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 10, 2024 EX-99.1

Nauticus Robotics Secures Additional Funding, Appoints New Executive Management, Improves Operations and Cost Structures, and Engages Strategic Advisor

Exhibit 99.1 Nauticus Robotics Secures Additional Funding, Appoints New Executive Management, Improves Operations and Cost Structures, and Engages Strategic Advisor Nauticus Robotics, Inc. (NASDAQ: KITT) (“Nauticus” or the “Company”), a developer of subsea autonomous robotic systems and software, today announced that it had secured an investment before the close of 2023 and eliminated many of the

January 10, 2024 EX-99.1

Nauticus Robotics Secures Additional Funding, Appoints New Executive Management, Improves Operations and Cost Structures, and Engages Strategic Advisor

Exhibit 99.1 Nauticus Robotics Secures Additional Funding, Appoints New Executive Management, Improves Operations and Cost Structures, and Engages Strategic Advisor Nauticus Robotics, Inc. (NASDAQ: KITT) (“Nauticus” or the “Company”), a developer of subsea autonomous robotic systems and software, today announced that it had secured an investment before the close of 2023 and eliminated many of the

January 10, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 10, 2024 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 10, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 10, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 10, 2024 NAUTICUS ROBOTIC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 10, 2024 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissio

January 8, 2024 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 11 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

January 8, 2024 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock ___________________________________

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 4 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repor

January 5, 2024 EX-10.1

First Amendment to Senior Secured Loan Agreement dated December 31, 2023 (incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed on January 5, 2024).

Exhibit 10.1 EXECUTION VERSION FIRST AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT THIS FIRST AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT (this “Agreement”) is entered into as of December 31, 2023, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), the undersigned guarantors (the “Guarantors” and together with the Company, collectively,

January 5, 2024 EX-10.3

Nauticus Second Lien Restructuring Agreement dated December 31, 2023

Exhibit 10.3 EXECUTION VERSION NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT THIS NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT (this “Agreement”) is entered into as of December 31, 2023, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), NAUTICUS ROBOTICS HOLDINGS, INC. (f/k/a Nauticus Robotics, Inc.), a Texas corporation (the “Nauticus Sub”),

January 5, 2024 EX-10.1

First Amendment to Senior Secured Term Loan Agreement dated December 31, 2023

Exhibit 10.1 EXECUTION VERSION FIRST AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT THIS FIRST AMENDMENT TO SENIOR SECURED TERM LOAN AGREEMENT (this “Agreement”) is entered into as of December 31, 2023, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), the undersigned guarantors (the “Guarantors” and together with the Company, collectively,

January 5, 2024 EX-10.2

Securities Purchase Agreement dated December 31, 2023

Exhibit 10.2 EXECUTION COPY SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of December 31, 2023, between Nauticus Robotics, Inc., a Texas corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively, the “Purchasers”). WHEREAS, subject to the term

January 5, 2024 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 31, 2023 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 31, 2023 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

January 5, 2024 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 31, 2023 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 31, 2023 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

January 5, 2024 EX-10.3

Nauticus Second Lien Restructuring Agreement dated December 31,

Exhibit 10.3 EXECUTION VERSION NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT THIS NAUTICUS SECOND LIEN RESTRUCTURING AGREEMENT (this “Agreement”) is entered into as of December 31, 2023, among NAUTICUS ROBOTICS, INC. (f/k/a Cleantech Acquisition Corp.), a Delaware corporation (the “Company”), NAUTICUS ROBOTICS HOLDINGS, INC. (f/k/a Nauticus Robotics, Inc.), a Texas corporation (the “Nauticus Sub”),

January 5, 2024 EX-10.2

Securities Purchase Agreement dated December 31, 2023

Exhibit 10.2 EXECUTION COPY SECURITIES PURCHASE AGREEMENT This Securities Purchase Agreement (this “Agreement”) is dated as of December 31, 2023, between Nauticus Robotics, Inc., a Texas corporation (the “Company”), and each purchaser identified on the signature pages hereto (each, including its successors and assigns, a “Purchaser” and collectively, the “Purchasers”). WHEREAS, subject to the term

December 22, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 18, 2023 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 18, 2023 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

December 22, 2023 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 10 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common

December 22, 2023 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 3 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repor

December 22, 2023 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 18, 2023 NAUTICUS ROBOTI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): December 18, 2023 NAUTICUS ROBOTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-40611 87-1699753 (State or other jurisdiction of incorporation) (Commissi

December 11, 2023 424B3

NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,92

Filed Pursuant to Rule 424(b)(3) Registration No. 333-267375 PROSPECTUS SUPPLEMENT NO. 9 (to prospectus dated April 18, 2023) NAUTICUS ROBOTICS, INC. 8,275,000 Shares of Common Stock Up to 8,625,000 Shares of Common Stock Underlying Public Warrants to Purchase Common Stock Up to 7,175,000 Shares of Common Stock Underlying Private Warrants to Purchase Common Stock Up to 2,922,425 Shares of Common S

December 11, 2023 424B3

NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock

Filed Pursuant to Rule 424(b)(3) Registration No. 333-273752 PROSPECTUS SUPPLEMENT NO. 2 (to prospectus dated September 12, 2023) NAUTICUS ROBOTICS, INC. Up to 1,890,066 Shares of Common Stock This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated September 12, 2023 (the “Prospectus”), with the information contained in our Current Repor

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