IPGP / IPG Photonics Corporation - Документы SEC, Годовой отчет, Доверенное заявление

Корпорация IPG Photonics
US ˙ NasdaqGS ˙ US44980X1090

Основная статистика
LEI 5493002KZ51CADQ94G15
CIK 1111928
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 IPG Photonics Corporation
SEC Filings (Chronological Order)
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August 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 August 5, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPO

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 August 5, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

August 5, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

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

August 5, 2025 EX-99.1

IPG PHOTONICS ANNOUNCES SECOND QUARTER 2025 FINANCIAL RESULTS Demand Recovery and Strategic Initiatives Drove Revenue Above Expectations Book-to-Bill was Approximately One as Bookings Also Remained Strong

Exhibit 99.1 IPG PHOTONICS ANNOUNCES SECOND QUARTER 2025 FINANCIAL RESULTS Demand Recovery and Strategic Initiatives Drove Revenue Above Expectations Book-to-Bill was Approximately One as Bookings Also Remained Strong MARLBOROUGH, Mass. – August 5, 2025 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the second quarter ended June 30, 2025. Three Months Ended June 30

July 8, 2025 EX-10.2

amended and restated on June 1, 2019

Exhibit 10.2 IPG PHOTONICS CORPORATION EXECUTIVE SEVERANCE PLAN (And Summary Plan Description) Article 1. Establishment and Term of the Plan 1.1 Establishment of the Plan. IPG Photonics Corporation (the “Corporation”) established the IPG Photonics Corporation Executive Severance Plan (the “Plan”) effective on January 1, 2014, amended and restated the Plan April 1, 2018, and now has amended and res

July 8, 2025 EX-10.1

(incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed with the Commission on July 8, 2025)

Exhibit 10.1 Managing Director's Service Contract Between (1) IPG Photonics GmbH & Co. KG, Carl-Benz-Straße 28, 57299 Burbach, – "Company" – And (2) Mr. Dr. Paulus Bucher, Nürnberger Straße 12, 40599 Düsseldorf, – "Mr. Bucher" – § 1 Appointment and representation (1) Mr. Bucher was appointed director of the Company with effect as of 1 July 2025 by resolution passed by the general partner IPG Photo

July 8, 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 July 1, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04

June 30, 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 June 24, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPOR

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 June 24, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

June 30, 2025 EX-10.1

Credit Agreement dated as of June 24, 2025 among IPG Photonics Corporation and certain subsidiaries, and Bank of America, N.A., in its capacity as Administrative Agent, Swing Line Lender and L/C Issuer, the other L/C Issuers, and the other Lenders from time to time a party thereto.

Exhibit 10.1 EXECUTION VERSION CREDIT AGREEMENT Dated as of June 24, 2025 among IPG PHOTONICS CORPORATION, and CERTAIN SUBSIDIARIES as the Borrowers, BANK OF AMERICA, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, The Other L/C Issuers Party Hereto, and The Other Lenders Party Hereto and BANK OF AMERICA, N.A., as Sole Lead Arranger and Sole Bookrunner TABLE OF CONTENTS Section

May 23, 2025 EX-1.01

Conflict Minerals Report for the year ended December 31, 2024

Exhibit 1.01 IPG Photonics Corporation Conflict Minerals Report For the year ended December 31, 2024 1.Introduction This report for the year ended December 31, 2024, is filed to comply with Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Rule 13p-1 under the Securities Exchange Act of 1934 (the “Rule”). The Rule imposes certain reporting obligations on

May 23, 2025 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 377 Simarano Drive Marlborough, Massachusetts 01752 (Addr

May 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 May 20, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORA

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 May 20, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04

May 21, 2025 S-8 POS

As filed with the United States Securities and Exchange Commission on May 20, 2025

As filed with the United States Securities and Exchange Commission on May 20, 2025 Registration No.

May 21, 2025 S-8 POS

As filed with the United States Securities and Exchange Commission on May 20, 2025

As filed with the United States Securities and Exchange Commission on May 20, 2025 Registration No.

May 21, 2025 EX-FILING FEES

Calculation of Filing Fee Table (filed herewith).

Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) IPG Photonics Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered(1) Proposed Maximum Offering Price Per Share(2) Maximum Aggregate Offering Price(2) Fee Rate Amount of Registration Fee Fees to be paid Equity Common Stock, $0.

May 21, 2025 S-8 POS

As filed with the United States Securities and Exchange Commission on May 20, 2025

As filed with the United States Securities and Exchange Commission on May 20, 2025 Registration No.

May 21, 2025 EX-10.1

2025 Incentive Compensation Plan effective May 20, 2025.

Exhibit 10.1 IPG PHOTONICS CORPORATION 2025 INCENTIVE COMPENSATION PLAN IPG Photonics Corporation (the “Company”) hereby establishes the IPG Photonics Corporation 2025 Incentive Compensation Plan for the benefit of its eligible Participants for the purposes hereinafter set forth. The Plan permits the award of Stock Options, Restricted Stock, Performance Shares, Performance Units, Stock Units, Cash

May 21, 2025 S-8

As filed with the United States Securities and Exchange Commission on May 20, 2025

As filed with the United States Securities and Exchange Commission on May 20, 2025 Registration No.

May 21, 2025 S-8 POS

As filed with the United States Securities and Exchange Commission on May 20, 2025

As filed with the United States Securities and Exchange Commission on May 20, 2025 Registration No.

May 6, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ 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

May 6, 2025 EX-99.1

IPG PHOTONICS ANNOUNCES FIRST QUARTER 2025 FINANCIAL RESULTS Growth from Strategic Initiatives Drove Revenue Above the Midpoint of Guidance Book-to-Bill was Above One and Highest in Over Two Years

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FIRST QUARTER 2025 FINANCIAL RESULTS Growth from Strategic Initiatives Drove Revenue Above the Midpoint of Guidance Book-to-Bill was Above One and Highest in Over Two Years MARLBOROUGH, Mass. – May 6, 2025 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the first quarter ended March 31, 2025. Three Months Ended March 31, (In mill

May 6, 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 May 6, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04-

May 2, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ 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

April 11, 2025 EX-10.1

Amendment to Services Agreement dated April 8, 2025 between the Registrant and Dr. Alexander Ovtchinnikov

Exhibit 10.1 April 8, 2025 Alexander Ovtchinnikov, Ph.D. Via Electronic Delivery Re: Extension of Services Agreement Dr. Ovtchinnikov, This letter is in reference to the Services Agreement between you and IPG Photonics Corporation (“IPG”) entered into as of August 15, 2024 (the “Services Agreement”). As discussed, we are pleased to memorialize our agreement to extend your consulting services with

April 11, 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 April 8, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

April 7, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ ) þ Filed by the Registrant ¨ Filed by a Party other

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ 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

April 7, 2025 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ 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

March 7, 2025 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 March 6, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

February 20, 2025 EX-97

IPG Photonics Corporation Incentive Based Compensation Recoupment Policy

Exhibit 97 IPG PHOTONICS CORPORATION INCENTIVE BASED COMPENSATION RECOUPMENT POLICY 1.

February 20, 2025 EX-10.1

Registration Rights Letter, dated February

Exhibit 10.1 Registration Rights Agreement IQ EQ Trust Company, U.S., LLC 3 Executive Park Drive, Suite 302 Bedford, NH 03110 February 20, 2025 IPG Photonics Corporation 377 Simarano Drive Marlborough, MA 01752 Attention: Dr. Mark Gitin, CEO Re: Request for Registration of Securities for Resale Dear Dr. Gitin: This letter agreement (the “Agreement”) is entered into by and between IQ EQ Trust Compa

February 20, 2025 EX-21.1

List of Subsidiaries

Exhibit 21.1 Subsidiaries of Registrant Name State or Jurisdiction of Incorporation Ownership by Registrant as of December 31, 2024 IPG Laser GmbH & Co. KG Germany 100%

February 20, 2025 EX-19

Insider Trading Policy

Exhibit 19 INSIDER TRADING POLICY Purpose This Insider Trading Policy (the “Policy”) provides guidelines with respect to transactions in the securities of IPG Photonics Corporation (the “Company”) and the handling of confidential information about the Company and the companies with which the Company does business.

February 20, 2025 S-3ASR

As filed with the Securities and Exchange Commission on February 20, 2025

As filed with the Securities and Exchange Commission on February 20, 2025 Registration No.

February 20, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ 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 ☐ 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-

February 20, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-3 (Form Type) IPG Photonics Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Share (2) Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee (3) Fees to be paid Equity Common Stock, $0.

February 11, 2025 EX-99.1

IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2024 FINANCIAL RESULTS Delivered Revenue At the High End of the Guidance Improved Gross Margin and Generated Strong Cash Flow From Operations

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2024 FINANCIAL RESULTS Delivered Revenue At the High End of the Guidance Improved Gross Margin and Generated Strong Cash Flow From Operations MARLBOROUGH, Mass. – February 11, 2025 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the fourth quarter ended December 31, 2024. Three Months Ended December 31, Twelve Mont

February 11, 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, 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 February 11, 2025 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

October 29, 2024 EX-99.2

IPG Photonics Announces Agreement to Acquire CleanLASER Tuck-in acquisition expands IPG’s opportunity in laser cleaning applications

Exhibit 99.2 IPG Photonics Announces Agreement to Acquire CleanLASER Tuck-in acquisition expands IPG’s opportunity in laser cleaning applications MARLBOROUGH, Mass. – October 29, 2024 - IPG Photonics Corporation (NASDAQ: IPGP) today announced that it has signed a definitive agreement to acquire Clean-Lasersysteme GmbH (cleanLASER), a leader in laser cleaning systems. The transaction strengthens IP

October 29, 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 October 29, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

October 29, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Num

October 29, 2024 EX-99.1

IPG PHOTONICS ANNOUNCES THIRD QUARTER 2024 FINANCIAL RESULTS Focusing on Execution and Future Growth Opportunities Delivered Results At the High End of Guidance

Exhibit 99.1 IPG PHOTONICS ANNOUNCES THIRD QUARTER 2024 FINANCIAL RESULTS Focusing on Execution and Future Growth Opportunities Delivered Results At the High End of Guidance MARLBOROUGH, Mass. – October 29, 2024 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the third quarter ended September 30, 2024. Three Months Ended September 30, Nine Months Ended September 30,

August 29, 2024 EX-99.1

IPG Photonics Announces Sale of its Russian Operations

Exhibit 99.1 IPG Photonics Announces Sale of its Russian Operations MARLBOROUGH, Mass. – August 29, 2024 - IPG Photonics Corporation (NASDAQ: IPGP) today announced that it has sold its entire interest in its Russian subsidiary, IRE-Polus. The purchaser is a group led by Softline Projects LLC and current management of IRE-Polus. The sale marks the finalization of IPG’s exit from all facilities in R

August 29, 2024 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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 August 27, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

August 16, 2024 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 August 15, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

August 16, 2024 EX-10.1

(incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed with the Commission on August 16, 2024)

Exhibit 10.1 SERVICES AGREEMENT This SERVICES AGREEMENT (the “Agreement”) is made as of August 15, 2024 (the “Effective Date”) between IPG PHOTONICS CORPORATION (“IPG”), a Delaware corporation registered to do business in the Commonwealth of Massachusetts, having a principal business address of 377 Simarano Drive, Marlborough, MA 01752, and the service provider identified in Schedule A to this Agr

July 30, 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 July 30, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

July 30, 2024 EX-99.1

IPG PHOTONICS ANNOUNCES SECOND QUARTER 2024 FINANCIAL RESULTS Prioritizing Investment in Innovation Pipeline While Optimizing Business for Cash Generation

Exhibit 99.1 IPG PHOTONICS ANNOUNCES SECOND QUARTER 2024 FINANCIAL RESULTS Prioritizing Investment in Innovation Pipeline While Optimizing Business for Cash Generation MARLBOROUGH, Mass. – July 30, 2024 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the second quarter ended June 30, 2024. Three Months Ended June 30, Six Months Ended June 30, (In millions, except pe

July 30, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

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

June 18, 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 June 18, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

May 23, 2024 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 377 Simarano Drive Marlborough, Massachusetts 01752 (Addr

May 23, 2024 EX-1.01

Conflict Minerals Report for the year ended December 31, 2023

Exhibit 1.01 IPG Photonics Corporation Conflict Minerals Report For the year ended December 31, 2023 1.Introduction This report for the year ended December 31, 2023 is filed to comply with Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Rule 13p-1 under the Securities Exchange Act of 1934 (the “Rule”). The Rule imposes certain reporting obligations on

May 9, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ 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

May 9, 2024 DEF 14A

COURTESY PDF OF PROXY

- 6tlysto/ fi r\ 4 2024 ANNUAL MEETING PROXY STATEMENT & NOTICE OF ANNUAL MEETING JUNE 18, 2024 PHOTONICS Notice of Annual Meeting of Stockholders DODO DOG DATE AND TIME June 18, 2024 10:00 a.

May 9, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ ) þ Filed by the Registrant ¨ Filed by a Party other

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ 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

April 30, 2024 EX-10.3

Advisor Agreement dated April 25, 2024 between the Registrant and Dr. Eugene Scherbakov (incorporated by reference to Exhibit 10.3 to the Registrant's Current Report on Form 8-K filed with the Commission on April 30, 2024)

Exhibit 10.3 ADVISOR AGREEMENT THIS AGREEMENT is between Eugene Scherbakov (“Advisor”) and IPG Photonics Corporation (the “Company” or “Photonics”) (each a “Party” and collectively the “Parties”). Capitalized but undefined terms in this Agreement are defined in the Transition Agreement between Advisor and the Company. This Advisor Agreement is conditioned on the effectiveness of the Transition Agr

April 30, 2024 EX-99.2

IPG PHOTONICS ANNOUNCES LEADERSHIP TRANSITION Mark Gitin Appointed Next Chief Executive Officer and to Board of Directors Co-Founder Dr. Eugene Scherbakov to Remain a Member of the Board

Exhibit 99.2 IPG PHOTONICS ANNOUNCES LEADERSHIP TRANSITION Mark Gitin Appointed Next Chief Executive Officer and to Board of Directors Co-Founder Dr. Eugene Scherbakov to Remain a Member of the Board MARLBOROUGH, Mass. – April 30, 2024 - IPG Photonics Corporation (NASDAQ: IPGP) (“IPG” or the “Company”) today announced that its Board of Directors (the “Board”) has appointed Mark Gitin, 57, as the n

April 30, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ 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

April 30, 2024 EX-10.1

Employment Agreement dated April 25, 2024 between the Registrant and Dr. Mark Gitin (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed with the Commission on April 30, 2024)

Exhibit 10.1 EMPLOYMENT AGREEMENT This Employment Agreement (“Agreement”), executed on this 25th day of April 2024 (the “Effective Date”), by and between IPG Photonics Corporation, a Delaware corporation having its principal executive office at 377 Simarano Drive, Marlborough, MA 01540 (the “Corporation”), and Mark Gitin (“Executive”). The Corporation and Executive are referred to jointly below as

April 30, 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 April 25, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPO

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 April 25, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

April 30, 2024 EX-99.1

IPG PHOTONICS ANNOUNCES FIRST QUARTER 2024 FINANCIAL RESULTS Delayed E-mobility Investments and Soft Industrial Demand Negatively Impacted Results Strong Operating Cash Flow Benefited from Working Capital Management

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FIRST QUARTER 2024 FINANCIAL RESULTS Delayed E-mobility Investments and Soft Industrial Demand Negatively Impacted Results Strong Operating Cash Flow Benefited from Working Capital Management MARLBOROUGH, Mass. – April 30, 2024 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the first quarter ended March 31, 2024. Three Months En

April 30, 2024 EX-10.2

Transition Agreement dated April 25, 2024 between the Registrant, IPG Laser GmbH & Co. KG and Dr. Eugene Scherbakov (incorporated by reference to Exhibit 10.2 to the Registrant's Current Report on Form 8-K filed with the Commission on April 30, 2024)

Exhibit 10.2 April 25, 2024 Dr. Eugene Scherbakov Re: Transition Agreement Dear Eugene: This letter agreement follows our conversations regarding the transition from your employment with IPG Laser GmbH & Co. KG (“Laser”) and IPG Photonics Corporation (“Photonics”) and your anticipated continuing Advisor and Board service to Photonics. Laser and Photonics very much appreciate your years of service

April 30, 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 April 30, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPO

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 April 30, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

April 29, 2024 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1) (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 ☐ TRAN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1) (Mark One) ☑ 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 ☐ 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: 00

February 21, 2024 EX-97

IPG Photonics Corporation Incentive Based Compensation Recoupment Policy

Exhibit 97 IPG PHOTONICS CORPORATION INCENTIVE BASED COMPENSATION RECOUPMENT POLICY 1.

February 21, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ 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 ☐ 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-

February 21, 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 February 16, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 21, 2024 EX-21.1

List of Subsidiaries

Exhibit 21.1 Subsidiaries of Registrant Name State or Jurisdiction of Incorporation Ownership by Registrant as of December 31, 2023 IPG Laser GmbH & Co. KG Germany 100%

February 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 February 13, 2024 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 13, 2024 SC 13G/A

IPGP / IPG Photonics Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01226-ipgphotonicscorp.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: IPG Photonics Corp Title of Class of Securities: Common Stock CUSIP Number: 44980X109 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designat

February 13, 2024 EX-99.1

IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2023 FINANCIAL RESULTS Continued Growth in Welding and Medical Applications Working Capital Discipline Resulted in Strong Cash Flow From Operations

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2023 FINANCIAL RESULTS Continued Growth in Welding and Medical Applications Working Capital Discipline Resulted in Strong Cash Flow From Operations MARLBOROUGH, Mass. – February 13, 2024 - IPG Photonics Corporation (Nasdaq: IPGP) today reported financial results for the fourth quarter ended December 31, 2023. Three Months Ended December 31, Twelv

January 4, 2024 SC 13D/A

IPGP / IPG Photonics Corporation / Valentin Gapontsev Trust I - SC 13D/A Activist Investment

SC 13D/A 1 vgtr1sc13dadecember2023.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 5) IPG Photonics Corporation (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 44980X109 (CUSIP Number) Angelo P. Lopresti c/o IQ EQ Trust Company, U.S., LLC 3 Executiv

October 31, 2023 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 October 31, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

October 31, 2023 EX-99.1

IPG PHOTONICS ANNOUNCES THIRD QUARTER 2023 FINANCIAL RESULTS Weak Industrial Demand and Lower E-mobility Sales in China Negatively Impacted Results Gross Margin Improved to 44.1% Driven by Continued Focus on Manufacturing Costs and Efficiency

Exhibit 99.1 IPG PHOTONICS ANNOUNCES THIRD QUARTER 2023 FINANCIAL RESULTS Weak Industrial Demand and Lower E-mobility Sales in China Negatively Impacted Results Gross Margin Improved to 44.1% Driven by Continued Focus on Manufacturing Costs and Efficiency MARLBOROUGH, Mass. – October 31, 2023 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the third quarter ended Se

October 31, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Num

October 11, 2023 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 October 6, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

September 1, 2023 EX-10.1

Amendment to Dr. Scherbakov Service Agreement (incorporated by reference to Exhibit 10.1 to

Exhibit 10.1 Amendment to Service Agreement THIS AMENDMENT TO SERVICE AGREEMENT (this “Amendment”) is made and entered into effective as of August 30, 2023 (the “Amendment Effective Date”), by and between IPG Laser GmbH, a German limited liability company having an office at Carl-Benz-Strasse 28, D-57299 Burbach, Germany (the “Company”), and Evgeny Scherbakov (“Executive” and, together with the Co

September 1, 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 August 30, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORP

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 August 30, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

August 3, 2023 EX-FILING FEES

Filing Fee Table (filed herewith).

Exhibit 107 Calculation of Filing Fee Form S-8 (Form Type) IPG Photonics Corporation (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule (1) Amount Registered (2) Proposed Maximum Offering Price Per Unit (3) Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Equity Common Stock, $0.

August 3, 2023 S-8

As filed with the United States Securities and Exchange Commission on August 3, 2023

As filed with the United States Securities and Exchange Commission on August 3, 2023 Registration No.

August 1, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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 August 1, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

August 1, 2023 EX-10.1

.1 to the Registrant's Quarterly Report on Form 10-Q filed w

Exhibit 10.1 IPG PHOTONICS CORPORATION 2006 INCENTIVE COMPENSATION PLAN (As Amended and Restated Effective May 23, 2023) IPG Photonics Corporation (the “Company”) originally established the IPG Photonics Corporation 2006 Incentive Compensation Plan effective February 28, 2006, for the benefit of its eligible Participants for the purposes hereinafter set forth. The Company has amended the Plan from

August 1, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ 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

August 1, 2023 EX-99.2

IPG Photonics Announces Addition to its Board of Directors

Exhibit 99.2 IPG Photonics Announces Addition to its Board of Directors MARLBOROUGH, Mass. – August 1, 2023 - IPG Photonics Corporation (Nasdaq: IPGP) today announced that its Board of Directors has elected Kolleen Kennedy as a new director of the company, increasing the size of the Board to 11 members. “I am pleased to welcome Ms. Kennedy to the Board,” said John Peeler, non-executive Chair of th

August 1, 2023 EX-99.1

IPG PHOTONICS ANNOUNCES SECOND QUARTER 2023 FINANCIAL RESULTS Continued Growth in Welding and Cleaning Applications Driven by E-Mobility Softer Demand in Industrial Markets Impacted Sales and Outlook

Exhibit 99.1 IPG PHOTONICS ANNOUNCES SECOND QUARTER 2023 FINANCIAL RESULTS Continued Growth in Welding and Cleaning Applications Driven by E-Mobility Softer Demand in Industrial Markets Impacted Sales and Outlook MARLBOROUGH, Mass. – August 1, 2023 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the second quarter ended June 30, 2023. Three Months Ended June 30, Six

August 1, 2023 EX-3.1

Restated Certificate of Incorporation of the Registrant (incorporated by reference to Exhibit 3.1 to the Registrant’s Quarterly Report on Form 10-Q filed with the Commission on August 1, 2023).

Exhibit 3.1 RESTATED CERTIFICATE OF INCORPORATION OF IPG PHOTONICS CORPORATION The present name of the corporation is IPG Photonics Corporation. The corporation was incorporated by the filing of its original Certificate of Incorporation with the Secretary of State of the State of Delaware on December 2, 1998. This Restated Certificate of Incorporation of the corporation only restates and integrate

May 25, 2023 EX-3.1

Certificate of Amendment to Amended and Restated Certificate of Incorporation of IPG Photonics Corporation

Exhibit 3.1 CERTIFICATE OF AMENDMENT TO AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF IPG PHOTONICS CORPORATION IPG PHOTONICS CORPORATION (the “Corporation”), a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware, does hereby certify: FIRST: That the Board of Directors of the Corporation (the “Board of Directors”) has duly adopted t

May 25, 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 May 23, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORA

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 May 23, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04

May 22, 2023 EX-1.01

Conflict Minerals Report for the year ended December 31, 2022

Exhibit 1.01 IPG Photonics Corporation Conflict Minerals Report For the year ended December 31, 2022 1.Introduction This report for the year ended December 31, 2022 is filed to comply with Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Rule 13p-1 under the Securities Exchange Act of 1934 (the “Rule”). The Rule imposes certain reporting obligations on

May 22, 2023 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 377 Simarano Drive Marlborough, Massachusetts 01752 (Addr

May 2, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ 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

May 2, 2023 EX-99.1

IPG PHOTONICS ANNOUNCES FIRST QUARTER 2023 FINANCIAL RESULTS Growth in Welding Revenue with Record Results in E-Mobility and LightWELD Diversification Efforts Offsetting Softer Demand in Cutting and Marking Applications

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FIRST QUARTER 2023 FINANCIAL RESULTS Growth in Welding Revenue with Record Results in E-Mobility and LightWELD Diversification Efforts Offsetting Softer Demand in Cutting and Marking Applications MARLBOROUGH, Mass. – May 2, 2023 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the first quarter ended March 31, 2023. Three Months E

May 2, 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 May 2, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORAT

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 May 2, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04-

April 13, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ 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

April 13, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ ) þ Filed by the Registrant ¨ Filed by a Party other

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ 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

April 13, 2023 DEF 14A

COURTESYCOPYIPGPPROXY

2023 Annual Letter I am pleased to see that our strategy to diversify revenue, which was reflected in strong growth of emerging growth products and applications helped to offset soft demand in general industrial markets in China and Europe.

March 27, 2023 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ ) þ Filed by the Registrant ¨ Filed by a Party other

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ Filed by a Party other than the Registrant CHECK THE APPROPRIATE BOX: þ Preliminary Proxy Statement ¨ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6

March 17, 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 March 17, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPO

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 March 17, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

February 27, 2023 EX-10.3

(incorporated by reference to Exhibit 10.3 to the Registrant's Annual Report on Form 10-K filed with the Com

Exhibit 10.3 IPG PHOTONICS CORPORATION SENIOR EXECUTIVE ANNUAL INCENTIVE PLAN ARTICLE I GENERAL SECTION 1.1 PURPOSE. The purpose of the IPG Photonics Corporation Senior Executive Annual Incentive Plan (the "Plan") is to benefit and advance the interests of IPG Photonics Corporation, a Delaware corporation (the "Company"), by providing to selected senior executives of the Company and its subsidiari

February 27, 2023 EX-21.1

List of Subsidiaries

Exhibit 21.1 Subsidiaries of Registrant Name State or Jurisdiction of Incorporation Ownership by Registrant as of December 31, 2022 IPG Laser GmbH Germany 100%

February 27, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ 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-

February 22, 2023 EX-10.1

IPG Photonics Corporation Non-Employee Director Compensation Plan, as amended (incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the Commission on February 22, 2023)

Exhibit 10.1 IPG PHOTONICS CORPORATION NON-EMPLOYEE DIRECTOR COMPENSATION PLAN As Amended and Restated, effective February 17, 2023 Article 1. Establishment, Objectives and Duration 1.1 Amendment and Restatement of Plan. IPG Photonics Corporation, a Delaware corporation (the “Company”), hereby amends and restates the compensation plan for Non-Employee Directors known as the “IPG Photonics Corporat

February 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 February 17, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CO

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 February 17, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 14, 2023 SC 13G/A

IPGP / IPG Photonics Corporation / ALLIANCEBERNSTEIN L.P. - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* IPG Photonics Corp (Name of Issuer) Common Stock (Title of Class of Securities) 44980X109 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sch

February 14, 2023 EX-99.1

IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2022 FINANCIAL RESULTS Continued Growth in E-mobility, Renewable Energy and Medical Inventory Related Charges, Impairment of Long-Lived Assets and Restructuring Charges Impact Operating Results

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2022 FINANCIAL RESULTS Continued Growth in E-mobility, Renewable Energy and Medical Inventory Related Charges, Impairment of Long-Lived Assets and Restructuring Charges Impact Operating Results MARLBOROUGH, Mass. – February 14, 2023 - IPG Photonics Corporation (Nasdaq: IPGP) today reported financial results for the fourth quarter ended December 3

February 14, 2023 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 February 14, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 9, 2023 SC 13G/A

IPGP / IPG Photonics Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6)* Name of issuer: IPG Photonics Corp. Title of Class of Securities: Common Stock CUSIP Number: 44980X109 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒

January 23, 2023 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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 January 20, 2023 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

January 23, 2023 EX-99.1

IPG Photonics Announces Changes to the Board of Directors

Exhibit 99.1 IPG Photonics Announces Changes to the Board of Directors OXFORD, Mass. – January 23, 2023 - IPG Photonics Corporation (Nasdaq: IPGP) today announced the election of Greg Beecher to its Board of Directors. “I am pleased to welcome Mr. Beecher to the Board,” said John Peeler, non-executive Chair of the Board. “He has more than 35 years of broad technology industry experience coupled wi

January 23, 2023 EX-3.2

Amended and Restated By-Laws of the Registrant (incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K filed with the Commission on January 23, 2023).

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF IPG PHOTONICS CORPORATION Effective as of November 8, 2022 SECTION I Certificate of Incorporation and Bylaws 1.1 Conflicts. In the event of any conflict between the provisions of these bylaws and the provisions of the certificate of incorporation of IPG Photonics Corporation (the “Corporation”), the provisions of the certificate of incorporation shall gover

November 10, 2022 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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 November 8, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

November 10, 2022 EX-3.2

Amended and Restated Bylaws of IPG Photonics Corporation

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF IPG PHOTONICS CORPORATION Effective as of November 8, 2022 SECTION I Certificate of Incorporation and Bylaws 1.1Conflicts. In the event of any con?ict between the provisions of these bylaws and the provisions of the certi?cate of incorporation of IPG Photonics Corporation (the ?Corporation?), the provisions of the certificate of incorporation shall govern

November 1, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Num

November 1, 2022 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 November 1, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

November 1, 2022 EX-99.1

IPG PHOTONICS ANNOUNCES THIRD QUARTER 2022 FINANCIAL RESULTS Strong Demand from E-Mobility and Medical were Offset by Currency Headwinds and Softer General Industrial Demand in China and Europe

Exhibit 99.1 IPG PHOTONICS ANNOUNCES THIRD QUARTER 2022 FINANCIAL RESULTS Strong Demand from E-Mobility and Medical were Offset by Currency Headwinds and Softer General Industrial Demand in China and Europe OXFORD, Mass. ? November 1, 2022 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the third quarter ended September 30, 2022. Three Months Ended September 30, Nin

September 9, 2022 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 September 7, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

August 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? 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

August 2, 2022 EX-99.1

IPG PHOTONICS ANNOUNCES SECOND QUARTER 2022 FINANCIAL RESULTS Strong Performance in Electric Vehicle and Medical Applications Drives Sales Company Announces New $300 million Stock Repurchase Program After Completing $312 million of Repurchases in the

Exhibit 99.1 IPG PHOTONICS ANNOUNCES SECOND QUARTER 2022 FINANCIAL RESULTS Strong Performance in Electric Vehicle and Medical Applications Drives Sales Company Announces New $300 million Stock Repurchase Program After Completing $312 million of Repurchases in the First Half of 2022 OXFORD, Mass. ? August 2, 2022 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the se

August 2, 2022 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 August 2, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

June 24, 2022 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 June 24, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

May 25, 2022 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 May 24, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04

May 12, 2022 EX-1.01

Conflict Minerals Report for the year ended December 31, 2021.

Exhibit 1.01 IPG Photonics Corporation Conflict Minerals Report For the year ended December 31, 2021 1.Introduction This report for the year ended December 31, 2021 is filed to comply with Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the ?Act?) and Rule 13p-1 under the Securities Exchange Act of 1934 (the ?Rule?). The Rule imposes certain reporting obligations on

May 12, 2022 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 50 Old Webster Road, Oxford, Massachusetts 01540 (Address

May 5, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? 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

May 3, 2022 EX-99.1

IPG PHOTONICS ANNOUNCES FIRST QUARTER 2022 FINANCIAL RESULTS Successful Diversification Across Geographies and Applications Drives Strong Demand, Enhanced by Solid Performance in Electric Vehicle Applications and Emerging Growth Products

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FIRST QUARTER 2022 FINANCIAL RESULTS Successful Diversification Across Geographies and Applications Drives Strong Demand, Enhanced by Solid Performance in Electric Vehicle Applications and Emerging Growth Products OXFORD, Mass. ? May 3, 2022 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the first quarter ended March 31, 2022. T

May 3, 2022 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 May 3, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04-

April 6, 2022 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ ) þ Filed by the Registrant ¨ Filed by a Party other

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) ? Filed by the Registrant ? 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

April 6, 2022 DEF 14A

COURTESYCOPYIPGPPROXY

April 6, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) ? Filed by the Registrant ? 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

March 28, 2022 EX-99.1

IPG Photonics Announces Addition of New Directors to the Board

Exhibit 99.1 IPG Photonics Announces Addition of New Directors to the Board OXFORD, Mass. ? March 28, 2022 - IPG Photonics Corporation (NASDAQ: IPGP) today announced that the Company has appointed Agnes K. Tang and Felix Stukalin to its Board of Directors, increasing the Board size to 10 directors. ?I would like to welcome Agnes and Felix to the Board,? said John Peeler, non-executive Chair of the

March 28, 2022 8-K

Regulation FD Disclosure, 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 March 28, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

March 3, 2022 EX-99.1

IPG Photonics Announces Continued Production at Russian Operations Taking Steps To Minimize Disruptions And Implementing Contingency Plans In Light Of Global Sanctions

Exhibit 99.1 IPG Photonics Announces Continued Production at Russian Operations Taking Steps To Minimize Disruptions And Implementing Contingency Plans In Light Of Global Sanctions OXFORD, Mass. ? March 3, 2022 - IPG Photonics Corporation (NASDAQ: IPGP) today announced more information regarding its Russian operations in light of current events. IPG?s Russian facilities continue to operate and man

March 3, 2022 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 March 3, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

February 22, 2022 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 February 18, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 22, 2022 EX-21.1

List of Subsidiaries

Exhibit 21.1 Subsidiaries of Registrant Name State or Jurisdiction of Incorporation Ownership by Registrant as of December 31, 2021 IPG Laser GmbH Germany 100%

February 22, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? 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-

February 15, 2022 EX-99.1

IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2021 FINANCIAL RESULTS AND RECORD ANNUAL REVENUE Strong Demand in Europe, North America and Japan Drives Sales Increasing Contribution from Emerging Growth Products Further Diversifies Revenue Authorization of N

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2021 FINANCIAL RESULTS AND RECORD ANNUAL REVENUE Strong Demand in Europe, North America and Japan Drives Sales Increasing Contribution from Emerging Growth Products Further Diversifies Revenue Authorization of New $200 Million Stock Buyback Program OXFORD, Mass. ? February 15, 2022 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financi

February 15, 2022 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 February 15, 2022 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 14, 2022 SC 13G/A

IPGP / IPG Photonics Corporation / ALLIANCEBERNSTEIN L.P. Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* IPG Photonics Corp (Name of Issuer) Common Stock (Title of Class of Securities) 44980X109 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sch

February 10, 2022 SC 13G/A

IPGP / IPG Photonics Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 5)* Name of issuer: IPG Photonics Corp. Title of Class of Securities: Common Stock CUSIP Number: 44980X109 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ?

November 12, 2021 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 November 10, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

November 12, 2021 EX-10.1

IPG Photonics Corporation Non-Employee Director Compensation Plan, as amended.

Exhibit 10.1 IPG PHOTONICS CORPORATION NON-EMPLOYEE DIRECTOR COMPENSATION PLAN As Amended and Restated, effective October 29, 2021 Article 1. Establishment, Objectives and Duration 1.1 Amendment and Restatement of Plan. IPG Photonics Corporation, a Delaware corporation (the ?Company?), hereby amends and restates the compensation plan for Non-Employee Directors known as the ?IPG Photonics Corporati

November 3, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to . Commission File Num

November 2, 2021 EX-3.2

Amended and Restated Bylaws of IPG Photonics Corporation.

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF IPG PHOTONICS CORPORATION Effective as of October 29, 2021 SECTION I Certificate of Incorporation and Bylaws 1.1 Conflicts. In the event of any conflict between the provisions of these bylaws and the provisions of the certificate of incorporation of IPG Photonics Corporation (the ?Corporation?), the provisions of the certificate of incorporation shall gov

November 2, 2021 EX-99.1

IPG PHOTONICS REPORTS THIRD QUARTER 2021 FINANCIAL RESULTS Improved Demand in Europe and U.S. and Growth in Emerging Products and Applications Drive Revenue of $379 Million and Earnings per Diluted Share of $1.40

Exhibit 99.1 IPG PHOTONICS REPORTS THIRD QUARTER 2021 FINANCIAL RESULTS Improved Demand in Europe and U.S. and Growth in Emerging Products and Applications Drive Revenue of $379 Million and Earnings per Diluted Share of $1.40 OXFORD, Mass. ? November 2, 2021 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the third quarter ended September 30, 2021. Three Months Ende

November 2, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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 October 29, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

November 1, 2021 SC 13G/A

IPGP / IPG Photonics Corporation / IP FIBRE DEVICES LTD - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* IPG Photonics Corporation (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 44980X109 (CUSIP Number) October 22, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate

November 1, 2021 SC 13D/A

IPGP / IPG Photonics Corporation / Valentin Gapontsev Trust I - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 4) IPG Photonics Corporation (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 44980X109 (CUSIP Number) Angelo P. Lopresti IPG Photonics Corporation 50 Old Webster Road Oxford, MA 01540 (508) 373-1100 (Name, Address

November 1, 2021 SC 13G/A

IPGP / IPG Photonics Corporation / GAPONTSEV VALENTIN P - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 3)* IPG Photonics Corporation (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 44980X109 (CUSIP Number) October 22, 2021 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate

November 1, 2021 SC 13D

IPGP / IPG Photonics Corporation / Shcherbakov Eugene A - SC 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 IPG Photonics Corporation (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 44980X109 (CUSIP Number) Dr. Eugene A. Scherbakov 50 Old Webster Road Oxford, MA 01540 (508) 373-1100 (Name, Address and Telephone Number of Person Authorize

October 25, 2021 EX-99.1

IPG Photonics Announces the Passing of Founder Dr. Valentin Gapontsev, Unique Combination of Scientist, Entrepreneur and Leader Father of Fiber Laser Industry Commercialized Innovative Laser Technology Changing Industrial Manufacturing

Exhibit 99.1 IPG Photonics Announces the Passing of Founder Dr. Valentin Gapontsev, Unique Combination of Scientist, Entrepreneur and Leader Father of Fiber Laser Industry Commercialized Innovative Laser Technology Changing Industrial Manufacturing OXFORD, Mass., Oct. 25, 2021 (GLOBE NEWSWIRE) - It is with profound sadness that IPG Photonics announces the passing of beloved founder and Chairman an

October 25, 2021 8-K

Regulation FD Disclosure, 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 October 25, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

October 18, 2021 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 October 18, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

August 4, 2021 EX-10.1

Employment Agreement dated May 4, 2021 between Registrant and Dr. Valentin P. Gapontsev.

Exhibit 10.1 EMPLOYMENT AGREEMENT This Employment Agreement (?Agreement?), executed on this 4th day of May, 2021 (the ?Effective Date?), by and between IPG Photonics Corporation, a Delaware corporation having an office at 50 Old Webster Road, Oxford, MA 01540 (the ?Corporation?), and Valentin P. Gapontsev (?Executive?). The Corporation and Executive are referred to jointly below as the ?Parties.?

August 4, 2021 EX-10.3

Service Agreement dated May 4, 2021 between IPG Laser GmbH and Dr. Eugene Scherbakov.

Exhibit 10.3 SERVICE AGREEMENT This Service Agreement (?Agreement?), executed on this 4th day of May, 2021 (the ?Effective Date?), by and between IPG Laser GmbH, a German limited liability company having an office at Siemensstrasse 7, D-57299 Burbach, Germany (the ?Company?), and Evgeny Scherbakov (?Executive?). The Company and Executive are referred to jointly below as the ?Parties.? WHEREAS, the

August 4, 2021 EX-10.2

Secondment Agreement dated May 4, 2021 among the Registrant, IPG Laser GmbH and Dr. Eugene Scherbakov.

Exhibit 10.2 SECONDMENT AGREEMENT This Secondment Agreement (?Agreement?), executed on this 4th day of May, 2021 (the ?Effective Date?), by and between IPG Photonics Corporation, a Delaware corporation (?Photonics?), IPG Laser GmbH, a German limited liability company (?Laser?), and Evgeny Scherbakov, (?Executive?). Photonics, Laser and Executive are referred to jointly below as the ?Parties.? WHER

August 4, 2021 EX-10.4

Confidentiality, Non-Competition and Confirmatory Assignment Agreement dated May 4, 2021 between the Registrant and Dr. Eugene Scherbakov.

Exhibit 10.4 IPG Photonics Corporation 50 Old Webster Road Oxford, MA 01540 STATEMENT REGARDING CONFIDENTIALITY, NON-COMPETITION AND CONFIRMATORY ASSIGNMENT AGREEMENT Attached to this statement is your Confidentiality, Non-Competition and Confirmatory Assignment Agreement (the ?Agreement?) with IPG Photonics Corporation, including its subsidiaries (the ?Company?). Please take the time to review th

August 4, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ? 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

August 3, 2021 EX-99.1

IPG PHOTONICS REPORTS SECOND QUARTER 2021 FINANCIAL RESULTS Improved Demand in Europe and U.S. Drives Revenue of $372 Million and Earnings per Diluted Share of $1.29

Exhibit 99.1 IPG PHOTONICS REPORTS SECOND QUARTER 2021 FINANCIAL RESULTS Improved Demand in Europe and U.S. Drives Revenue of $372 Million and Earnings per Diluted Share of $1.29 OXFORD, Mass. ? August 3, 2021 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the second quarter ended June 30, 2021. Three Months Ended June 30, Six Months Ended June 30, (In millions, ex

August 3, 2021 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 August 3, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

May 26, 2021 EX-1.01

Conflict Minerals Report for the year ended December 31, 20

EX-1.01 2 exhibit1011.htm EX-1.01 Exhibit 1.01 IPG Photonics Corporation Conflict Minerals Report For the year ended December 31, 2020 1.Introduction This report for the year ended December 31, 2020 is filed to comply with Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Rule 13p-1 under the Securities Exchange Act of 1934 (the “Rule”). The Rule imposes

May 26, 2021 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 May 25, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04

May 26, 2021 SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 50 Old Webster Road, Oxford, Massachusetts 01540 (Address

May 5, 2021 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ? 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

May 4, 2021 EX-99.2

IPG Photonics Announces CEO Transition Eugene A. Scherbakov, COO, to become CEO Valentin P. Gapontsev, CEO, to transition to Executive Chairman of the Board and remain active

Exhibit 99.2 IPG Photonics Announces CEO Transition Eugene A. Scherbakov, COO, to become CEO Valentin P. Gapontsev, CEO, to transition to Executive Chairman of the Board and remain active OXFORD, Mass. ? May 4, 2021 - IPG Photonics Corporation (NASDAQ: IPGP) today announced a management change, which is effective immediately. Eugene A. Scherbakov Ph.D., currently Chief Operating Officer, Managing

May 4, 2021 DEFA14A

- 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 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a- 6(e)(2)) o Definitive Proxy Stat

May 4, 2021 EX-99.1

IPG PHOTONICS REPORTS FIRST QUARTER 2021 FINANCIAL RESULTS Demand Recovery Strengthens, Driving Revenue of $346 Million and Earnings per Diluted Share of $1.26 Eugene A. Scherbakov to become CEO and Valentin P. Gapontsev to transition to Executive Ch

Exhibit 99.1 IPG PHOTONICS REPORTS FIRST QUARTER 2021 FINANCIAL RESULTS Demand Recovery Strengthens, Driving Revenue of $346 Million and Earnings per Diluted Share of $1.26 Eugene A. Scherbakov to become CEO and Valentin P. Gapontsev to transition to Executive Chairman of the Board OXFORD, Mass. ? May 4, 2021 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the first

May 4, 2021 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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 May 4, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04-

April 15, 2021 DEFR14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) ? Filed by the Registrant ? 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-

April 15, 2021 DEFR14A

DEFR14A

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April 9, 2021 DEF 14A

DEF 14A

April 9, 2021 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.__ )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) ? Filed by the Registrant ? 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

April 9, 2021 DEFA14A

- 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 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a- 6(e)(2)) o Definitive Proxy Stat

March 16, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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 March 10, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

February 22, 2021 EX-10.1

IPG Photonics Corporation Non-Employee Director Compensation Plan, as amended.

Exhibit 10.1 IPG PHOTONICS CORPORATION NON-EMPLOYEE DIRECTOR COMPENSATION PLAN As Amended and Restated February 19, 2021 Article 1. Establishment, Objectives and Duration 1.1 Amendment and Restatement of Plan. IPG Photonics Corporation, a Delaware corporation (the ?Company?), hereby amends and restates the compensation plan for Non-Employee Directors known as the ?IPG Photonics Corporation Non-Emp

February 22, 2021 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? 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-

February 22, 2021 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 February 19, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 22, 2021 EX-21.1

List of Subsidiaries

Exhibit 21.1 Subsidiaries of Registrant Name State or Jurisdiction of Incorporation Ownership by Registrant as of December 31, 2020 IPG Laser GmbH Germany 100% NTO IRE-Polus Russia 100%

February 16, 2021 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 February 16, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 16, 2021 EX-99.1

IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2020 FINANCIAL RESULTS Company Ends 2020 with Year-Over-Year Growth in Sales and Strong Bookings EPS of $0.92 Reduced by Additional Inventory Charge of $0.20 and Foreign Exchange Loss of $0.07

EX-99.1 2 ipgp12312020exhibit991.htm EX-99.1 Exhibit 99.1 IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2020 FINANCIAL RESULTS Company Ends 2020 with Year-Over-Year Growth in Sales and Strong Bookings EPS of $0.92 Reduced by Additional Inventory Charge of $0.20 and Foreign Exchange Loss of $0.07 OXFORD, Mass. – February 16, 2021 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results

February 16, 2021 SC 13G/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENT FILED PURSUANT TO § 240.13d-1(b), (c) AND (d) AND AMENDMENTS FILED PURSUANT TO §240.13d-2 (Amendment No. 12)* IPG Photonics C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENT FILED PURSUANT TO § 240.13d-1(b), (c) AND (d) AND AMENDMENTS FILED PURSUANT TO §240.13d-2 (Amendment No. 12)* IPG Photonics Corporation (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 44980X (CUSIP Number) December 31, 2020 (Date of

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 4)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 4)* Name of issuer: IPG Photonics Corp. Title of Class of Securities: Common Stock CUSIP Number: 44980X109 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒

February 8, 2021 SC 13G

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* IPG Photonics Corp (Name of Issuer) Common Stock (Title of Class of Securities) 44980X109 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sched

January 7, 2021 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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 January 7, 2021 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

January 7, 2021 EX-99.1

IPG Photonics Further Strengthens Board with Addition of Jeanmarie Desmond and Natalia Pavlova

EX-99.1 2 pressrelease991.htm EX-99.1 Exhibit 99.1 Contact: Nicholas Manganaro Sharon Merrill Associates (617) 542-5300 [email protected] IPG Photonics Further Strengthens Board with Addition of Jeanmarie Desmond and Natalia Pavlova OXFORD, Mass., January 7, 2021 – IPG Photonics Corporation (NASDAQ: IPGP) today announced that the Company has appointed Ms. Jeanmarie Desmond and Ms. Natalia

December 4, 2020 8-K

Other Events - 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 December 4, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

November 3, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ☐ 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 001-331

October 30, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - 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 October 30, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

October 30, 2020 EX-99.1

IPG PHOTONICS ANNOUNCES THIRD QUARTER 2020 FINANCIAL RESULTS Revenue of $318 Million Exceeds the Top End of the Guidance Range Earnings per Diluted Share of $0.66 Reduced by $0.63 due to Goodwill Impairment Charge

EX-99.1 2 ipgp09302020exhibit991.htm EX-99.1 Exhibit 99.1 IPG PHOTONICS ANNOUNCES THIRD QUARTER 2020 FINANCIAL RESULTS Revenue of $318 Million Exceeds the Top End of the Guidance Range Earnings per Diluted Share of $0.66 Reduced by $0.63 due to Goodwill Impairment Charge OXFORD, Mass. – October 30, 2020 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the third quart

September 21, 2020 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 September 21, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS C

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 September 21, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File N

September 16, 2020 8-K

Other Events - 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 September 16, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File N

August 24, 2020 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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 August 18, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

August 24, 2020 EX-3.2

Amended and Restated Bylaws of IPG Photonics Corporation (incorporated by reference to Exhibit 3.2 to the Registrant's Current Report on Form 8-K filed with the Commission on August 24, 2020)

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF IPG PHOTONICS CORPORATION Effective as of August 18, 2020 SECTION I Certificate of Incorporation and Bylaws 1.1 Conflicts. In the event of any conflict between the provisions of these bylaws and the provisions of the certificate of incorporation of IPG Photonics Corporation (the “Corporation”), the provisions of the certificate of incorporation shall gove

August 4, 2020 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 August 4, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

August 4, 2020 EX-99.1

IPG PHOTONICS ANNOUNCES SECOND QUARTER 2020 FINANCIAL RESULTS Earnings Per Diluted Share of $0.71 Reduced by $0.20 from Foreign Exchange Loss and Charge for Restructuring and Asset Impairment

Exhibit 99.1 IPG PHOTONICS ANNOUNCES SECOND QUARTER 2020 FINANCIAL RESULTS Earnings Per Diluted Share of $0.71 Reduced by $0.20 from Foreign Exchange Loss and Charge for Restructuring and Asset Impairment OXFORD, Mass. – August 4, 2020 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the second quarter ended June 30, 2020. Three Months Ended June 30, Six Months Ended

August 4, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ☐ 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 001-33155 IP

June 18, 2020 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 June 10, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

May 29, 2020 SD

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 50 Old Webster Road, Oxford, Massachusetts 01540 (Address

May 29, 2020 EX-1.01

Conflict Minerals Report for the year ended December 31, 201

Exhibit 1.01 IPG Photonics Corporation Conflict Minerals Report For the year ended December 31, 2019 1.Introduction This report for the year ended December 31, 2019 is filed to comply with Section 1502 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Rule 13p-1 under the Securities Exchange Act of 1934 (the “Rule”). The Rule imposes certain reporting obligations on

May 29, 2020 8-K

Other Events, 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 May 28, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04

May 5, 2020 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 May 5, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04-

May 5, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 OR ☐ 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 001-33155 I

May 5, 2020 EX-99.1

IPG PHOTONICS ANNOUNCES FIRST QUARTER 2020 FINANCIAL RESULTS Earnings Per Diluted Share of $0.68 Increased by $0.28 Due to Foreign Exchange Gains Company Increases Share Repurchase Program by $200 Million

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FIRST QUARTER 2020 FINANCIAL RESULTS Earnings Per Diluted Share of $0.68 Increased by $0.28 Due to Foreign Exchange Gains Company Increases Share Repurchase Program by $200 Million OXFORD, Mass. – May 5, 2020 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the first quarter ended March 31, 2020. Three Months Ended March 31, (In m

April 23, 2020 8-K

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

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 April 22, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

April 23, 2020 EX-10.1

First Amendment to Credit Facility Agreement between IPG Laser GmbH and Deutsche Bank AG, dated April 20, 2020 (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed with the Commission on April 23, 2020)

Exhibit 10.1 1st amendment dated April 20, 2020 to the Credit Facility Agreement in the amount of EUR 50,000,000.00 dated July 27, 2017 IPG Laser GmbH Siemensstraße 7 57299 Burbach (the ”Borrower“) and Deutsche Bank AG Filiale Deutschlandgeschäft An den Dominikanern 11 – 27 50 668 Cologne (the ”Bank”) entered into an credit agreement (the „Credit Facility Agreement“) pursuant to which the Bank mak

April 8, 2020 DEFA14A

IPGP / IPG Photonics Corp. DEFA14A - - 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 Filed by the Registrant ý Filed by a Party other than the Registrant ¨ Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a- 6(e)(2) ) o Definitive Proxy Sta

April 7, 2020 DEF 14A

IPGP / IPG Photonics Corp. DEF 14A - - DEFINITIVE PROXY STATEMENT

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 (Rule 14a-101) SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) þ Filed by the Registrant ¨ 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

April 7, 2020 DEF 14A

IPGP / IPG Photonics Corp. DEF 14A - - COURTESY PDF OF PROXY

begin 644 ipgpcourtesycopyproxy.pdf M)5!$1BTQ+C4-)>+CS],-"C,X.2 P(&]B:@T\/"],:6YE87)I>F5D(#$O3" V M.3(Q-3%LS.#D@ M,CE=+TEN9F\@,S@X(# @4B],96YG=&@@.#0O4')E=B V.3$R-#,O4F]O=" S M.3 @,"!2+U-I>F4@-#$X+U1Y<&4O6%)E9B]76S$@,B Q73X^(Y0$B4D'<;!"K&<2J!;$N M FN5I"./4!"\S*06!/+P,3(* (RCX&1-.(0^HW@ # )Y*#"H-"F5N9'-T MR!R:#&[('/%8N=QF,,K3+S5QX\I8\WZ3>:3M)2[(HRAN M*<(LN4R 47@YWS0Q-NXN"3&A4LG/[*<4?+2WB7CRETEG\[Z3

March 26, 2020 EX-10.1

Second Amended and Restated Loan Agreement, between the Registrant and Bank of America, N.A. dated as of March 25, 2020 (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed with the Commission on March 26, 2020)

Exhibit 10.1 SECOND AMENDED AND RESTATED LOAN AGREEMENT THIS SECOND AMENDED AND RESTATED LOAN AGREEMENT (“this Agreement”) dated as of March 25, 2020, is by and between IPG PHOTONICS CORPORATION, a Delaware corporation with a principal place of business at 50 Old Webster Road, Oxford, Massachusetts 01540 (the “Borrower”) and BANK OF AMERICA, N.A., a national banking association with an office at 1

March 26, 2020 8-K

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, 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 March 25, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

March 26, 2020 EX-10.2

Revolving Credit Note, between the Registrant and Bank of America, N.A., dated March 25, 2020 (incorporated by reference to Exhibit 10.2 to the Registrant's Current Report on Form 8-K filed with the Commission on March 26, 2020)

EX-10.2 3 exhibit102revolvingcre.htm EX-10.2 Exhibit 10.2 REVOLVING CREDIT NOTE $75,000,000.00 Worcester, Massachusetts March 25, 2020 FOR VALUE RECEIVED, the undersigned, IPG PHOTONICS CORPORATION, a Delaware corporation with a principal place of business at 50 Old Webster Road, Oxford, Massachusetts 01540 (the “Borrower”) hereby promises to pay to BANK OF AMERICA, N.A., a national banking associ

February 24, 2020 EX-4.2

Description of the Registrant's Securities Registered under Section 12 of the Exchange Act (incorporated by reference to Exhibit 4.2 to the Registrant's Annual Report on Form 10-K filed with the Commission on February 24, 2020)

Exhibit 4.2 DESCRIPTION OF SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 The following summary describes the material terms of the common stock, par value $0.0001 per share, of IPG Photonics Corporation (the “Company”), which is the only security of the Company registered pursuant to Section 12 of the Securities Exchange Act of 1934, as amended. This is intend

February 24, 2020 EX-21.1

List of Subsidiaries

Exhibit 21.1 Subsidiaries of Registrant Name State or Jurisdiction of Incorporation Ownership by Registrant as of December 31, 2019 IPG Laser GmbH Germany 100%

February 24, 2020 EX-10.6

Service Agreement dated May 30, 2019 between IPG Laser GmbH and Dr. Eugene Scherbakov

Exhibit 10.6 SERVICE AGREEMENT This Service Agreement (“Agreement”), executed on this 30th day of May 2019 (the “Effective Date”), by and between IPG Laser GmbH, a German limited liability company having an office at Siemensstrasse 7, D-57299 Burbach, Germany (the “Company”), and Evgeny Scherbakov, residing at Auf der Bracht 7, D-57299 Burbach, Germany (“Executive”). The Company and Executive are

February 24, 2020 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ☐ 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-

February 24, 2020 EX-10.7

Form of Employment Agreement dated May 30, 2019 between the Registrant and each of Timothy P.V. Mammen, Angelo P. Lopresti and Alexander Ovtchinnikov

Exhibit 10.7 EMPLOYMENT AGREEMENT This Employment Agreement (“Agreement”), executed on this 30th day of May 2019 (the “Effective Date”), by and between IPG Photonics Corporation, a Delaware corporation having an office at 50 Old Webster Road, Oxford, MA 01540 (the “Corporation”), and (“Executive”). The Corporation and Executive are referred to jointly below as the “Parties.” WHEREAS, the Corporati

February 24, 2020 EX-10.5

Employment Agreement dated May 30, 2019 between the Registrant and Dr. Valentin P. Gapontsev

EX-10.5 3 ex105q42019.htm EX-10.5 Exhibit 10.5 EMPLOYMENT AGREEMENT This Employment Agreement (“Agreement”), executed on this 30th day of May 2019 (the “Effective Date”), by and between IPG Photonics Corporation, a Delaware corporation having an office at 50 Old Webster Road, Oxford, MA 01540 (the “Corporation”), and Valentin P. Gapontsev (“Executive”). The Corporation and Executive are referred t

February 21, 2020 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 February 19, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 21, 2020 EX-10.1

IPG Photonics Corporation Non-Employee Director Compensation Plan, as amended.

Exhibit 10.1 IPG PHOTONICS CORPORATION NON-EMPLOYEE DIRECTOR COMPENSATION PLAN As Amended and Restated Effective February 19, 2020 Article 1. Establishment, Objectives and Duration 1.1 Amendment and Restatement of Plan. IPG Photonics Corporation, a Delaware corporation (the “Company”), hereby amends and restates the compensation plan for Non-Employee Directors known as the “IPG Photonics Corporati

February 13, 2020 EX-99.1

IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2019 FINANCIAL RESULTS Fourth Quarter Revenue Exceeds Guidance; Company Generates $130 Million Operating Cash Flow Goodwill and Asset Impairment, Inventory Provision and Restructuring Charges Reduce Earnings Per

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FOURTH QUARTER 2019 FINANCIAL RESULTS Fourth Quarter Revenue Exceeds Guidance; Company Generates $130 Million Operating Cash Flow Goodwill and Asset Impairment, Inventory Provision and Restructuring Charges Reduce Earnings Per Diluted Share by $0.99 OXFORD, Mass. – February 13, 2020 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for

February 13, 2020 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 February 13, 2020 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

February 12, 2020 SC 13G/A

IPGP / IPG Photonics Corp. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: IPG Photonics Corp Title of Class of Securities: Common Stock CUSIP Number: 44980X109 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ 

January 21, 2020 SC 13G

IPGP / IPG Photonics Corp. / GAPONTSEV VALENTIN P - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENT FILED PURSUANT TO § 240.13d-1(b), (c) AND (d) AND AMENDMENTS FILED PURSUANT TO §240.13d-2 (Amendment No. 11)* IPG Photonics Corporation (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 44980X (CUSIP Number) December 2, 2019 (Date of E

December 4, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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 September 6, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

November 5, 2019 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 OR ☐ 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 001-331

October 29, 2019 EX-99

IPG PHOTONICS ANNOUNCES THIRD QUARTER 2019 FINANCIAL RESULTS

Exhibit 99.1 IPG PHOTONICS ANNOUNCES THIRD QUARTER 2019 FINANCIAL RESULTS OXFORD, Mass. – October 29, 2019 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the third quarter ended September 30, 2019. Three Months Ended September 30, Nine Months Ended September 30, (In millions, except per share data and percentages) 2019 2018 Change 2019 2018 Change Revenue $ 329.1 $

October 29, 2019 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 October 29, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.

September 17, 2019 8-K

Current Report

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 August 6, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

August 6, 2019 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019 OR ☐ 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 001-33155 IPG

July 30, 2019 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 July 30, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

July 30, 2019 EX-99.1

IPG PHOTONICS ANNOUNCES SECOND QUARTER 2019 FINANCIAL RESULTS

Exhibit 99.1 IPG PHOTONICS ANNOUNCES SECOND QUARTER 2019 FINANCIAL RESULTS OXFORD, Mass. – July 30, 2019 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the second quarter ended June 30, 2019. Three Months Ended June 30, Six Months Ended June 30, (In millions, except per share data and percentages) 2019 2018 Change 2019 2018 Change Revenue $ 363.8 $ 413.6 (12) % $ 6

June 3, 2019 EX-10.1

IPG Photonics Corporation 2008 Employee Stock Purchase Plan, as amended and restated effective December 1, 2018 (incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K filed with the Commission on June 3, 2019)

EX-10.1 2 a2008eestkpurchaseplan.htm 2008 EE STK PURCHASE PLAN AS A&R Exhibit 10.1 IPG PHOTONICS CORPORATION 2008 EMPLOYEE STOCK PURCHASE PLAN (As Amended and Restated Effective December 1, 2018) ARTICLE I INTRODUCTION 1.01 Purpose. IPG Photonics Corporation (the "Company") established and maintains this IPG Photonics Corporation 2008 Employee Stock Purchase Plan, as amended from time to time (the

June 3, 2019 8-K

Financial Statements and Exhibits, Other Events, 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 May 30, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 04

May 28, 2019 SD

IPGP / IPG Photonics Corp. SD - - 2019 FORM SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 001-33155 04-3444218 (State or other jurisdiction of incorporation or organization) (Commission File Number) (IRS Employer Identification No.) 50 Old Webster Road, Oxford, Massachusetts 01540 (Address

May 28, 2019 EX-1.01

UNITED STATES SECURITIES AND EXCHANGE COMMISSION IPG Photonics Corporation Conflict Minerals Report For the year ended December 31, 2018

Exhibit 1.01 UNITED STATES SECURITIES AND EXCHANGE COMMISSION IPG Photonics Corporation Conflict Minerals Report For the year ended December 31, 2018 1. Introduction This report for the year ended December 31, 2018 is filed to comply with Rule 13p-1 under the Securities Exchange Act of 1934 (the “Rule”). The Rule imposes certain reporting obligations on SEC registrants whose manufactured products

May 8, 2019 10-Q

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2019 OR [ ] 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 001-33155

April 30, 2019 EX-99.1

IPG PHOTONICS ANNOUNCES FIRST QUARTER 2019 FINANCIAL RESULTS

Exhibit 99.1 IPG PHOTONICS ANNOUNCES FIRST QUARTER 2019 FINANCIAL RESULTS OXFORD, Mass. – April 30, 2019 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the first quarter ended March 31, 2019. Three Months Ended March 31, (In millions, except per share data and percentages) 2019 2018 Change Revenue $ 315.0 $ 359.9 (12) % Gross margin 47.3 % 56.5 % Operating income $

April 30, 2019 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 April 30, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

April 8, 2019 DEFA14A

IPGP / IPG Photonics Corp. DEFINITIVE ADDITIONAL MATERIALS

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 ý Filed by a Party other than the Registrant ¨ Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a- 6(e)(2) ) o Definitive Proxy Sta

April 5, 2019 DEF 14A

IPGP / IPG Photonics Corp. DEFINITIVE PROXY STATEMENT

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 ý 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)) ý Definitive Proxy Stat

April 5, 2019 DEF 14A

IPGP / IPG Photonics Corp. COURTESY PDF OF PROXY

begin 644 courtesycopyipgpproxy.pdf M)5!$1BTQ+C<*)>+CS],-"CA%1-;Q0Q#+WG5^2,-%[;^9:J M/4 K!#=$) Z(0SMJ$4@M@CWT[,R']O=:18T\B@??G[VBY/=^\]BOQ,VVIV MM8H56Q^,,)5L&=\\2DK,K#9Q(5^P4!-[MTAV$ P&%\,FSKV'[/Y@J>;E] M8C8 YHO:>OVR6MTQRKD1,*,<>D,\]((N13\'; 0),[=QQ>=BFE>+:'FG6I M.1(JG&J>1I(S";.WGCUB9FU% ^=D(G1'[VDDI5#,&^]A5@W*-)S"$N8C+,)R MRV%>UW(L9).%1D]).;R*JVM<"3#$$0\;>[EAD]1+/(O!"[Q/Z]A1WD+@K;Y+ M()Z";KRGXL-:

March 7, 2019 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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 March 5, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.) 0

March 7, 2019 EX-3.2

Amended and Restated By-laws of the Registrant (incorporated by reference to Exhibit 3.2 to the Registrant's current Report on Form 8-K filed with the Commission on March 7, 2019)

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF IPG PHOTONICS CORPORATION Effective as of March 5, 2019 SECTION I Certificate of Incorporation and Bylaws 1.1 Conflicts. In the event of any conflict between the provisions of these bylaws and the provisions of the certificate of incorporation of IPG Photonics Corporation (the "Corporation"), the provisions of the certificate of incorporation shall govern

February 27, 2019 10-K

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 10-K (Mark One) þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-33155 IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware 04-3444218 (State or other jurisdiction of incorporation or organization) (IRS Employer Identification No.

February 27, 2019 EX-21.1

List of Subsidiaries

Exhibit 21.1 Subsidiaries of Registrant Name State or Jurisdiction of Incorporation Ownership by Registrant as of December 31, 2018 IPG Laser GmbH Germany 100% NTO IRE-Polus Russia 100%

February 20, 2019 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 February 15, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 0001-33155 (Commission File N

February 13, 2019 SC 13G/A

IPGP / IPG Photonics Corp. / VANGUARD GROUP INC Passive Investment

ipgphotonicscorp.htm - Generated by SEC Publisher for SEC Filing SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2 )* Name of issuer: IPG Photonics Corp Title of Class of Securities: Common Stock CUSIP Number: 44980X109 Date of Event Which Requires Filing of this Statement: December 31, 2018 Check the appropriate box

February 12, 2019 EX-99.1

IPG Photonics Announces Fourth Quarter 2018 Financial Results

Exhibit 99.1 IPG Photonics Announces Fourth Quarter 2018 Financial Results OXFORD, Mass. – February 12, 2019 - IPG Photonics Corporation (NASDAQ: IPGP) today reported financial results for the fourth quarter ended December 31, 2018. Three Months Ended December 31, Twelve Months Ended December 31, (In millions, except per share data) 2018 2017 % Change 2018 2017 % Change Revenue $ 330.1 $ 361.1 (9)

February 12, 2019 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 February 12, 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No

January 25, 2019 EX-99.1

IPG Photonics Appoints Greg Dougherty to Board of Directors Brings extensive leadership and industry experience to the Board

Exhibit 99.1 IPG Photonics Appoints Greg Dougherty to Board of Directors Brings extensive leadership and industry experience to the Board OXFORD, Mass. – January 25, 2019 - IPG Photonics Corporation (NASDAQ: IPGP) has appointed Gregory P. Dougherty to its Board of Directors. Mr. Dougherty was an officer and director of numerous optical components and laser-based technology companies, most recently

January 25, 2019 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 January 23 2019 Date of Report (Date of earliest event reported) IPG PHOTONICS CORPORATION (Exact name of registrant as specified in its charter) Delaware (State or Other Jurisdiction of Incorporation) 001-33155 (Commission File No.)

November 5, 2018 EX-99.1

IPG PHOTONICS ANNOUNCES AGREEMENT TO ACQUIRE GENESIS SYSTEMS GROUP Genesis a leader in the integration of robotic welding and automation solutions

Exhibit 99.1 IPG PHOTONICS ANNOUNCES AGREEMENT TO ACQUIRE GENESIS SYSTEMS GROUP Genesis a leader in the integration of robotic welding and automation solutions OXFORD, Mass. – November 5, 2018 - IPG Photonics Corporation (NASDAQ: IPGP) today announced that it has signed a definitive agreement to acquire privately held Genesis Systems Group (Genesis), a leader in the integration of robotic welding

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