POWL / Powell Industries, Inc. - Документы SEC, Годовой отчет, Доверенное заявление

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

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 1934For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indust

POWELL INDUSTRIES ANNOUNCES THIRD QUARTER FISCAL 2025 RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES THIRD QUARTER FISCAL 2025 RESULTS HOUSTON — August 5, 2025 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, control

Powell Industries Declares Quarterly Cash Dividend

Exhibit 99.2 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 Powell Industries Declares Quarterly Cash Dividend HOUSTON — August 5, 2025 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distrib

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): August 5, 2025 POWELL INDUSTRIES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): August 5, 2025 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): July 18, 2025 POWELL INDUSTRIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 8550 Mosley Road Houston, Texas 77075-1180 (Address of prin

Conflict Minerals Report for the calendar year ended December 31, 2024 as required by Item 1.01 of this Form.

Exhibit 1.01 Conflict Minerals Report For the Year Ended December 31, 2024 This is the Conflict Minerals Report (this “Report”) of Powell Industries, Inc. (referred to herein as “Powell”, the “Company”, “we”, “us” or “our”) for calendar year 2024 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Please refer to Section 13(p) of the Exchange A

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

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 001-12488 Powell Ind

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 6, 2025 POWELL INDUSTRIES, IN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 6, 2025 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission Fil

POWELL INDUSTRIES ANNOUNCES SECOND QUARTER FISCAL 2025 RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES SECOND QUARTER FISCAL 2025 RESULTS HOUSTON — May 6, 2025 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, control an

Powell Industries Declares Quarterly Cash Dividend

Exhibit 99.2 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 Powell Industries Declares Quarterly Cash Dividend HOUSTON — May 6, 2025 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distributi

Second Amended and Restated Bylaws of Powell Industries, Inc. (filed as Exhibit 3.1 to our Form 8-K filed February 24, 2025, and incorporated herein by reference).

Exhibit 3.1 SECOND AMENDED AND RESTATED BYLAWS OF POWELL INDUSTRIES, INC. Adopted by the Board of Directors: February 19, 2025 Effective: February 19, 2025 TABLE OF CONTENTS Page ARTICLE 1 OFFICES 1 Section 1.1 Principal Office 1 Section 1.2 Registered Office 1 Section 1.3 Other Offices 1 ARTICLE 2 STOCKHOLDERS 1 Section 2.1 Place of Meetings 1 Section 2.2 Annual Meeting 1 Section 2.3 Special Meet

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 19, 2025 POWELL INDUSTRI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 19, 2025 POWELL INDUSTRIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commissi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 19, 2025 POWELL INDUSTRI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of report (Date of earliest event reported): February 19, 2025 POWELL INDUSTRIES, INC. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commissi

Amended and Restated Certificate of Incorporation of Powell Industries, Inc. filed with the Secretary of State of the State of Delaware on February 19, 2025 (filed as Exhibit 3.1 to our Form 8-K filed February 19, 2025, and incorporated herein by reference)

Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF POWELL INDUSTRIES, INC. Powell Industries, Inc., a corporation (the “Corporation”) organized and existing under and by virtue of the General Corporation Law of the State of Delaware, hereby certifies that: A. The Name of the Corporation is Powell Industries, Inc. B. The original Certificate of Incorporation of the Corporation was fil

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

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 1934For the quarterly period ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell In

POWELL INDUSTRIES ANNOUNCES FIRST QUARTER FISCAL 2025 RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FIRST QUARTER FISCAL 2025 RESULTS HOUSTON — February 6, 2025 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, contro

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 6, 2025 POWELL INDUSTRIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 6, 2025 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commissio

POWELL INDUSTRIES RAISES QUARTERLY DIVIDEND TO $0.2675 PER SHARE

Exhibit 99.1 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES RAISES QUARTERLY DIVIDEND TO $0.2675 PER SHARE HOUSTON — February 4, 2025 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, con

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 4, 2025 POWELL INDUSTRIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 4, 2025 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commissio

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

TABLE OF CONTENTS 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:          ☐     Preliminary Proxy Statement  ☐     Confidential, for Use of the Commission Only (as permitted by Rule

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 ap

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: ☐ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))  ☐ Definitive Proxy St

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

TABLE OF CONTENTS 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:         ☒     Preliminary Proxy Statement  ☐     Confidential, for Use of the Commission Only (as permitted by Rule 1

Conforming Changes Amendment, dated September 24, 2024, by and between the Company, as Borrower, and Bank of America, N.A., as Administrative Agent.

EXHIBIT 10.21 CONFORMING CHANGES AMENDMENT THIS CONFORMING CHANGES AMENDMENT (this “Agreement”), dated as of September 24, 2024 (the “Execution Date”), is entered into by BANK OF AMERICA, N.A., as administrative agent (the “Administrative Agent”) and POWELL INDUSTRIES, INC., a Delaware corporation (the “Borrower”). RECITALS WHEREAS, the Borrower, the lenders from time to time party thereto (the “L

Insider Trading Policy effective September 1, 2022.

EXHIBIT 19 Insider Trading Policy Version: 9.1 Applies To: Company Company Policy Governance Policies Effective Date September 1, 2022 Supersedes Author Callahan, Bob Approvals Metcalf, Michael Purpose The purpose of this Insider Trading Policy (the “Policy”) is to promote compliance with applicable securities laws by Powell Industries, Inc. and its subsidiaries (“Powell” or the “Company”) and all

Subsidiaries of Powell Industries, Inc.

EXHIBIT 21.1 SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell Industries International B.V. Netherlands Powell International B.V. Netherlands Powell (UK) Limited United Kingdom Powell Industries Asia, Pte, Ltd. Singapore Powell Canada B.V. Netherlan

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

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 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 Number 001-12488 Powell Industr

Description of Powell Industries, Inc.'s Common Stock

EXHIBIT 4 Description of Powell Industries, Inc.’s Securities Registered under Section 12 of the Securities Exchange Act of 1934 We have one class of securities, our common stock, registered under Section 12 of the Securities Exchange Act of 1934, as amended. Our common stock is listed for trading on the Nasdaq Global Market under the symbol “POWL.” Our authorized capital stock consists of 30,000,

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): November 19, 2024 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commissi

POWELL INDUSTRIES ANNOUNCES FOURTH QUARTER AND FULL YEAR FISCAL 2024 RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FOURTH QUARTER AND FULL YEAR FISCAL 2024 RESULTS HOUSTON — November 19, 2024 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the ma

Powell Industries Declares Quarterly Cash Dividend

Exhibit 99.1 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 Powell Industries Declares Quarterly Cash Dividend HOUSTON — November 5, 2024 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distr

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): November 5, 2024 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commissio

POWL / Powell Industries, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 8 )* Powell Industries Inc (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

POWL / Powell Industries, Inc. / POWELL THOMAS W - SC 13D/A Activist Investment

SC 13D/A 1 tm2425942d1sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 2)* Powell Industries, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 739128106 (CUSIP Number) Thomas W. Powell P.O. Box 300 Giddings, Texas 78942 Tel: 713-819-5274 (Name, Address

Canadian Benchmark Replacement Conforming Changes Amendment, dated June 26, 2024, by and between the Company, as Borrower,

EXHIBIT 10.1 CANADIAN BENCHMARK REPLACEMENT CONFORMING CHANGES AMENDMENT THIS CANADIAN BENCHMARK REPLACEMENT CONFORMING CHANGES AMENDMENT (this “Agreement”), dated as of June 26, 2024, is entered into among POWELL INDUSTRIES, INC., a Delaware corporation (the “Borrower”), and BANK OF AMERICA, N.A., as administrative agent (the “Administrative Agent”). RECITALS WHEREAS, the Borrower, the lenders fr

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

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 1934For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indust

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): July 30, 2024 POWELL INDUSTRIES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): July 30, 2024 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission F

Powell Industries Declares Quarterly Cash Dividend

Exhibit 99.2 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 Powell Industries Declares Quarterly Cash Dividend HOUSTON — July 30, 2024 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, control and distribu

POWELL INDUSTRIES ANNOUNCES THIRD QUARTER FISCAL 2024 RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES THIRD QUARTER FISCAL 2024 RESULTS HOUSTON — July 30, 2024 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, contr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 8550 Mosley Road Houston, Texas 77075-1180 (Address of prin

Conflict Minerals Report for the calendar year ended December 31, 2023 as required by Item 1.01 of this Form.

Exhibit 1.01 Conflict Minerals Report For the Year Ended December 31, 2023 This is the Conflict Minerals Report (this “Report”) of Powell Industries, Inc. (referred to herein as “Powell”, the “Company”, “we”, “us” or “our”) for calendar year 2023 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Please refer to Section 13(p) of the Exchange A

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

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 1934For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indus

POWELL INDUSTRIES ANNOUNCES FISCAL 2024 SECOND QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2024 SECOND QUARTER RESULTS HOUSTON — April 30, 2024 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, con

Powell Industries Declares Quarterly Cash Dividend

Exhibit 99.2 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 Powell Industries Declares Quarterly Cash Dividend HOUSTON — April 30, 2024 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distrib

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): April 30, 2024 POWELL INDUSTRIES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): April 30, 2024 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 13, 2024 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commissi

POWL / Powell Industries, Inc. / POWELL THOMAS W - SC 13D/A Activist Investment

SC 13D/A 1 tm245985d1sc13da.htm SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 1)* Powell Industries, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 739128106 (CUSIP Number) Thomas W. Powell P.O. Box 300 Giddings, Texas 78942 Tel: 713-819-5274 (Name, Address a

POWL / Powell Industries, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01725-powellindustriesinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 3)* Name of issuer: Powell Industries Inc Title of Class of Securities: Common Stock CUSIP Number: 739128106 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to de

POWL / Powell Industries, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7 )* Powell Industries Inc (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

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

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 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 001-12488 Powell

POWELL INDUSTRIES ANNOUNCES FISCAL 2024 FIRST QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2024 FIRST QUARTER RESULTS HOUSTON — January 30, 2024 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, co

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): January 30, 2024 POWELL INDUSTRIES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): January 30, 2024 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES RAISES QUARTERLY DIVIDEND TO $0.2650 PER SHARE

Exhibit 99.2 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES RAISES QUARTERLY DIVIDEND TO $0.2650 PER SHARE HOUSTON —January 30, 2024 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, cont

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): January 5, 2024 POWELL INDUSTRIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): January 5, 2024 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission

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

TABLE OF CONTENTS 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:  ☐ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ D

(filed as Exhibit 10.29 to our Form 10-K filed December 6, 2023 and incorporated herein by reference)

EXHIBIT 10.29 THIRD AMENDMENT TO CREDIT AGREEMENT THIS THIRD AMENDMENT TO CREDIT AGREEMENT (this “Amendment”) is entered into as of October 4, 2023 (the “Third Amendment Effective Date”), among POWELL INDUSTRIES, INC., a Delaware corporation (the “Borrower”), certain Subsidiaries of the Borrower party hereto, as guarantors (the “Guarantors”), the lenders party hereto (the “Lenders”), and BANK OF A

Executive Recoupment Policy effective September

EXHIBIT 97 Executive Recoupment Policy Version: 2.0 Applies To: Company Company Policy Governance Policies Effective Date September 20, 2023 Supersedes Author Callahan, Bob Approvals Board of Directors Purpose This policy provides guidelines for possible recoupment or clawback of incentive compensation in appropriate situations to the extent permitted (or required) by law and by the Company’s plan

Subsidiaries of Powell Industries, Inc.

EXHIBIT 21.1 SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell Industries International B.V. Netherlands Powell International B.V. Netherlands Powell (UK) Limited United Kingdom Powell Industries Asia, Pte, Ltd. Singapore Powell Canada B.V. Netherlan

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

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 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 Number 001-12488 Powell Industr

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): December 5, 2023 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES ANNOUNCES FISCAL 2023 FOURTH QUARTER AND FULL YEAR RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2023 FOURTH QUARTER AND FULL YEAR RESULTS HOUSTON — December 5, 2023 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): October 31, 2023 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — October 31, 2023 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and d

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): October 4, 2023 POWELL INDUSTRIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): October 4, 2023 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission

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

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 1934For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indust

POWELL INDUSTRIES ANNOUNCES FISCAL 2023 THIRD QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2023 THIRD QUARTER RESULTS HOUSTON — August 1, 2023 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, cont

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): August 1, 2023 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — August 1, 2023 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distrib

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 8550 Mosley Road Houston, Texas 77075-1180 (Address of prin

Conflict Minerals Report for the calendar year ended December 31, 2022 as required by Item 1.01 of this Form.

Exhibit 1.01 Conflict Minerals Report For the Year Ended December 31, 2022 This is the Conflict Minerals Report (this “Report”) of Powell Industries, Inc. (referred to herein as, “Powell”, the “Company”, “we”, “us” or “our”) for calendar year 2022 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Please refer to Section 13(p) of the Exchange

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K/A CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 15, 2023 POWELL INDUSTRI

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K/A CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 15, 2023 POWELL INDUSTRIES, INC.

Filing Fee Table

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

As filed with the Securities and Exchange Commission on May 19, 2023

S-8 As filed with the Securities and Exchange Commission on May 19, 2023 Registration No.

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

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 1934For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indus

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 2, 2023 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — May 2, 2023 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distributi

POWELL INDUSTRIES ANNOUNCES FISCAL 2023 SECOND QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2023 SECOND QUARTER RESULTS HOUSTON — May 2, 2023 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, contro

Second Amendment to Credit Agreement, dated March 31, 2023 (filed as Exhibit 10.1 to our Form 8-K filed April 6, 2023 and incorporated herein by reference).

Exhibit 10.1 SECOND AMENDMENT TO CREDIT AGREEMENT This SECOND AMENDMENT TO CREDIT AGREEMENT (this “Amendment”) is entered into as of March 31, 2023 (the “Second Amendment Effective Date”), among POWELL INDUSTRIES, INC., a Delaware corporation (the “Borrower”), certain Subsidiaries of the Borrower party hereto, as guarantors (the “Guarantors”), the lenders party hereto (the “Lenders”), and BANK OF

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 DATE OF REPORT (Date of earliest event reported): March 31, 2023 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): April 5, 2023 POWELL INDUSTRIES, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation) (Commission F

Powell Industries, Inc. | 8550 Mosley Road | Houston, TX 77075 | 713.944.6900 | powellind.com

March 30, 2023 Ms. Beverly Singleton Ms. Claire Erlanger Division of Corporation Finance Office of Manufacturing United States Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Re: Powell Industries, Inc. Form 10-K for the Fiscal Year Ended September 30, 2022 Filed December 6, 2022 Form 8-K, Filed January 31, 2023 File No. 001-12488 Dear Ms. Singleton and Ms. Erlanger, Thi

March 20, 2023

CORRESP March 20, 2023 Ms. Beverly Singleton Ms. Claire Erlanger Division of Corporation Finance Office of Manufacturing United States Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Re: Powell Industries, Inc. Form 10-K for the fiscal year ended September 30, 2022 Filed December 6, 2022 Form 8-K, Filed January 31, 2023 File No. 001-12488 Dear Ms. Singleton and Ms. Erlan

First Amendment to Powell Industries, Inc. 2014 Equity Incentive Plan (filed as Exhibit 10.1 to our Form 8-K filed February 16, 2023 and incorporated herein by reference).

Exhibit 10.1 APPENDIX A FIRST AMENDMENT TO POWELL INDUSTRIES, INC. 2014 EQUITY INCENTIVE PLAN This First Amendment (this “First Amendment”) to that certain Powell Industries, Inc. 2014 Equity Incentive Plan (the “Plan”) of Powell Industries, Inc., a Delaware corporation (the “Company”), is adopted as of December 21, 2022, subject to the approval of the stockholders of the Company. All capitalized

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 15, 2023 POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6 )* Powell Industries Inc (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box

As filed with the Securities and Exchange Commission on February 9, 2023

As filed with the Securities and Exchange Commission on February 9, 2023 Registration No.

Filing Fee Table

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

POWL / Powell Industries, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01696-powellindustriesinc.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 2)* Name of issuer: Powell Industries Inc. Title of Class of Securities: Common Stock CUSIP Number: 739128106 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to d

First Amendment to Powell Industries, Inc. 2014 Non-Employee Director Equity Incentive Plan (filed as Exhibit 10.2 to our Form S-8 filed February 9, 2023 and incorporated herein by reference).

Exhibit 10.2 FIRST AMENDMENT TO POWELL INDUSTRIES, INC. 2014 NON-EMPLOYEE DIRECTOR EQUITY INCENTIVE PLAN This First Amendment (this “First Amendment”) to that certain Powell Industries, Inc. 2014 Non-Employee Director Equity Incentive Plan (the “Plan”) of Powell Industries, Inc., a Delaware corporation (the “Company”), is adopted as of December 15, 2021, subject to the approval of the stockholders

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

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 1934For the quarterly period ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell In

America, N.A., as Administrative Agent (filed as Exhibit 10.1 to our Form 10-Q filed February 1, 2023 and incorporated herein by reference).

EXHIBIT 10.1 LIBOR TRANSITION AMENDMENT THIS LIBOR TRANSITION AMENDMENT (this “Amendment”), dated as of November 10, 2022 (the “Amendment Effective Date”), is entered into among POWELL INDUSTRIES, INC., a Delaware corporation (the “Borrower”), the guarantor(s) party hereto (the “Guarantor(s)”), and BANK OF AMERICA, N.A., as administrative agent (the “Administrative Agent”), L/C Issuer, Swingline L

POWELL INDUSTRIES RAISES QUARTERLY DIVIDEND BY 1% TO $0.2625 PER SHARE

Exhibit 99.2 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES RAISES QUARTERLY DIVIDEND BY 1% TO $0.2625 PER SHARE HOUSTON —January 31, 2023 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management

POWELL INDUSTRIES ANNOUNCES FISCAL 2023 FIRST QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2023 FIRST QUARTER RESULTS HOUSTON — January 31, 2023 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, co

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): January 31, 2023 POWELL INDUSTRIES,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): January 31, 2023 POWELL INDUSTRIES, INC.

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

TABLE OF CONTENTS 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: ?? ? ? Preliminary Proxy Statement ?? ? ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)

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

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 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 Number 001-12488 Powell Industr

Subsidiaries of Powell Industries, Inc.

EXHIBIT 21.1 SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell Industries International B.V. Netherlands Powell International B.V. Netherlands Powell (UK) Limited United Kingdom Powell Industries Asia, Pte, Ltd. Singapore Powell Canada B.V. Netherlan

POWELL INDUSTRIES ANNOUNCES FISCAL 2022 FOURTH QUARTER AND FULL YEAR RESULTS

Exhibit 99.1 PRESS RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2022 FOURTH QUARTER AND FULL YEAR RESULTS HOUSTON ? December 5, 2022 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, control a

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): December 5, 2022 POWELL INDUSTRIES, INC.

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

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 1934For the quarterly period ended June 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indust

POWELL INDUSTRIES ANNOUNCES FISCAL 2022 THIRD QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2022 THIRD QUARTER RESULTS HOUSTON — August 2, 2022 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, cont

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): August 2, 2022 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — August 2, 2022 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distrib

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter)

SD 1 a2021conflictmineralsformsd.htm SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 8550 Mosley Road Ho

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

EX-1.01 2 ex1012021conflictmineralsr.htm EX-1.01 Exhibit 1.01 Conflict Minerals Report For the Year Ended December 31, 2021 This is the Conflict Minerals Report (this “Report”) of Powell Industries, Inc. (referred to herein as, “Powell”, the “Company”, “we”, “us” or “our”) for calendar year 2021 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”

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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 10, 2022 POWELL INDUSTRIES, INC.

May 10, 2022

Exhibit 99.1 May 10, 2022 To the Board of Directors of Powell Industries, Inc. I hereby resign from the Board of Directors of Powell Industries, Inc. and all committees thereof effective immediately. //s// Perry L. Elders Perry L. Elders

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

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 001-12488 Powell Ind

POWELL INDUSTRIES ANNOUNCES FISCAL 2022 SECOND QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2022 SECOND QUARTER RESULTS HOUSTON ? May 3, 2022 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, contro

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 3, 2022 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE For Immediate Release Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON ? May 3, 2022 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distributi

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 3, 2022 POWELL INDUSTRIES, INC.

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 16, 2022 POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. / 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.: 1)* Name of issuer: Powell Industries Inc. Title of Class of Securities: Common Stock CUSIP Number: 739128106 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

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

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 1934For the quarterly period ended December 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell In

LIBOR Transition Amendment, dated December 31, 2021, by and between the Company, as Borrower, certain subsidiaries of the Company identified therein, as Guarantors, the Lenders party thereto and Bank of America, N.A., as Administrative Agent (filed as Exhibit 10.1 to our Form 10-Q filed February 9, 2022 and incorporated herein by reference).

EXHIBIT 10.1 LIBOR TRANSITION AMENDMENT THIS LIBOR TRANSITION AMENDMENT (this ?Amendment?), dated as of December, 31, 2021 (the ?Amendment Effective Date?), is entered into among POWELL INDUSTRIES, INC., a Delaware corporation (the ?Borrower?), the Guarantors (as defined below) party hereto, the Lenders (as defined below) party hereto and BANK OF AMERICA, N.A., as administrative agent (the ?Admini

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 8, 2022 POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. / DIMENSIONAL FUND ADVISORS LP - 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. 5 )* Powell Industries Inc (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (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

POWELL INDUSTRIES ANNOUNCES FISCAL 2022 FIRST QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2022 FIRST QUARTER RESULTS HOUSTON ? February 8, 2022 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, co

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 1, 2022 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON ? February 1, 2022 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distr

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

DEF 14A 1 ny20001594x1def14a.htm DEF 14A TABLE OF CONTENTS 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:  ☐ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission On

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

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 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 Number 001-12488 Powell Industr

Subsidiaries of Powell Industries, Inc.

EXHIBIT 21.1 SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell Industries International B.V. Netherlands Powell International B.V. Netherlands Powell (UK) Limited United Kingdom Powell Industries Asia, Pte, Ltd. Singapore Powell Canada B.V. Netherlan

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): December 7, 2021 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES ANNOUNCES FISCAL 2021 FOURTH QUARTER AND FULL YEAR RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2021 FOURTH QUARTER AND FULL YEAR RESULTS HOUSTON ? December 7, 2021 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the

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

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 001-12488 Powell Indu

POWELL INDUSTRIES ANNOUNCES FISCAL 2021 THIRD QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2021 THIRD QUARTER RESULTS HOUSTON ? August 3, 2021 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, cont

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): August 3, 2021 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON ? August 3, 2021 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distrib

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 8550 Mosley Road Houston, Texas 77075-1180 (Address of prin

Conflict Minerals Report for the calendar year ended December 31, 2020

EX-1.01 2 ex1012020conflictmineralsr.htm EX-1.01 Exhibit 1.01 Conflict Minerals Report For the Year Ended December 31, 2020 This is the Conflict Minerals Report (this “Report”) of Powell Industries, Inc. (referred to herein as, “Powell”, the “Company”, “we”, “us” or “our”) for calendar year 2020 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”

Quarterly Report - 10-Q

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 001-12488 Powell Ind

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 4, 2021 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON ? May 4, 2021 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distributi

POWELL INDUSTRIES ANNOUNCES FISCAL 2021 SECOND QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE For immediate release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2021 SECOND QUARTER RESULTS HOUSTON ? May 4, 2021 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, contro

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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): March 12, 2021 POWELL INDUSTRIES, INC.

First Amendment to Credit Agreement dated March 12, 2021

Exhibit 10.1 FIRST AMENDMENT TO CREDIT AGREEMENT THIS FIRST AMENDMENT TO CREDIT AGREEMENT (this ?Amendment?) is entered into as of March 12, 2021 (the ?Effective Date?), among POWELL INDUSTRIES, INC., a Delaware corporation (the ?Borrower?), certain Subsidiaries of Borrower party hereto, as guarantors (the ?Guarantors?), the lenders from time to time party hereto (the ?Lenders?), and BANK OF AMERI

POWELL INDUSTRIES ANNOUNCES RETIREMENT OF CHAIRMAN EMERITUS THOMAS W. POWELL

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES RETIREMENT OF CHAIRMAN EMERITUS THOMAS W. POWELL HOUSTON — March 5, 2021 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the ma

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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): March 1, 2021 POWELL INDUSTRIES, INC.

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 26, 2021 POWELL INDUSTRIES, INC.

Amendment No. 1 to Amended and Restated Bylaws of Powell Industries, Inc. (filed as Exhibit 3.1 to our Form 8-K filed February 26, 2021, and incorporated herein by reference)

Exhibit 3.1 POWELL INDUSTRIES, INC. (a Delaware corporation) (the ?Company?) AMENDMENT NO. 1 TO THE AMENDED AND RESTATED BYLAWS Pursuant to Section 8.1 of the Amended and Restated Bylaws (the ?Bylaws?) of the Company, the Bylaws were amended by unanimous approval of the members of the Board of Directors of the Company as follows: 1. Section 2.7 of the Bylaws is hereby deleted in its entirety and r

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 17, 2021 POWELL INDUSTRIES, INC.

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* Powell Industries Inc (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (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

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: Powell Industries Inc. Title of Class of Securities: Common Stock CUSIP Number: 739128106 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: ☒ Rule 13d-1(b) ☐ 

Quarterly Report - 10-Q

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 1934For the quarterly period ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell In

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 2, 2021 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — February 2, 2021 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical

POWELL INDUSTRIES ANNOUNCES FISCAL 20201 FIRST QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE For Immediate Release Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 20201 FIRST QUARTER RESULTS HOUSTON — February 2, 2021 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom-engineered solutions for the management, c

- DEF 14A

TABLE OF CONTENTS 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:  ☐ Preliminary Proxy Statement  ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ D

Subsidiaries of Powell Industries, Inc.

EXHIBIT 21.1 SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell Industries International B.V. Netherlands Powell International B.V. Netherlands Powell (UK) Limited United Kingdom Powell Industries Asia, Pte, Ltd. Singapore Powell Canada B.V. Netherlan

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

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 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 001-12488 Powell Industr

POWELL INDUSTRIES ANNOUNCES FISCAL 2020 FOURTH QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES ANNOUNCES FISCAL 2020 FOURTH QUARTER RESULTS HOUSTON — DECEMBER 8, 2020 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distributio

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): December 8, 2020 POWELL INDUSTRIES, INC.

Financial Statements and Exhibits, Other Events - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): November 3, 2020 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Robert Winters or Ryan Coleman Alpha IR Group [email protected] 312-445-2870 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — NOVEMBER 3, 2020 /PRNewswire/ — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management,

Quarterly Report - 10-Q

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 1934For the quarterly period ended June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indust

POWELL INDUSTRIES ANNOUNCES FISCAL 2020 THIRD QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations [email protected] 713-529-6600 POWELL INDUSTRIES ANNOUNCES FISCAL 2020 THIRD QUARTER RESULTS HOUSTON — AUGUST 4, 2020 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): August 4, 2020 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations 713-529-6600 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — August 4, 2020 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distri

Conflict Minerals Report for the calendar year ended December 31, 2019

Exhibit 1.01 Conflict Minerals Report For the Year Ended December 31, 2019 This is the Conflict Minerals Report (this “Report”) of Powell Industries, Inc. (referred to herein as, “Powell”, the “Company”, “we”, “us” or “our”) for calendar year 2019 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Please refer to Section 13(p) of the Exchange

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 8550 Mosley Road Houston, Texas 77075-1180 (Address of prin

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the quarterly period ended March 31, 2020 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indus

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 5, 2020 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES ANNOUNCES FISCAL 2020 SECOND QUARTER RESULTS Highest Backlog in Company History

EX-99.1 2 ex991-q220earningsrelease.htm EXHIBIT 99.1 Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations [email protected] 713-529-6600 POWELL INDUSTRIES ANNOUNCES FISCAL 2020 SECOND QUARTER RESULTS Highest Backlog in Company History HOUSTON — MAY 5, 2020 — Powe

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations 713-529-6600 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — May 5, 2020 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribut

POWL / Powell Industries, Inc. CORRESP - -

March 18, 2020 Ms. Heather Clark Ms. Melissa Raminpour United States Securities and Exchange Commission Division of Corporate Finance Office of Manufacturing 100 F Street, N.E. Washington, DC 20549 Re: Powell Industries, Inc. Form 10-K for the fiscal year ended September 30, 2019 Filed December 5, 2019 File No. 001-12488 Dear Ms. Clark and Ms. Raminpour, This letter is submitted on behalf of Powel

POWL / Powell Industries, Inc. CORRESP - -

March 2, 2020 Ms. Heather Clark Ms. Melissa Raminpour Division of Corporate Finance United States Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Re: Powell Industries, Inc. Form 10-K for the fiscal year ended September 30, 2019 Filed December 5, 2019 File No. 001-12488 Dear Ms. Clark and Ms. Raminpour, We are respectfully requesting an extension regarding the proposed d

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 21, 2020 POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. / 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.: 1)* Name of issuer: Powell Industries Inc Title of Class of Securities: Common Stock CUSIP Number: 739128106 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:

POWL / Powell Industries, Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* POWELL INDUSTRIES INC (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

POWL / Powell Industries, Inc. 10-Q - Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the quarterly period ended December 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell In

POWELL INDUSTRIES ANNOUNCES FISCAL 2020 FIRST QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations [email protected] 713-529-6600 POWELL INDUSTRIES ANNOUNCES FISCAL 2020 FIRST QUARTER RESULTS HOUSTON — FEBRUARY 4, 2020 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solution

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations 713-529-6600 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON - February 4, 2020 - Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and dist

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): February 4, 2020 POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. / DEPRINCE RACE & ZOLLO INC - SCHEDULE 13G/A Passive Investment

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

POWL / Powell Industries, Inc. DEF 14A - - DEF 14A

DEF 14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 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(e)(2)) ☒ Definitive Pro

POWL / Powell Industries, Inc. DEFA14A - - 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

POWL / Powell Industries, Inc. 10-K - Annual Report - 10-K

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 September 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Industri

Subsidiaries of Powell Industries, Inc.

EXHIBIT 21.1 SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell Industries International B.V. Netherlands Powell International B.V. Netherlands Powell (UK) Limited United Kingdom Powell Industries Asia, Pte, Ltd. Singapore Powell Canada B.V. Netherlan

Amended and Restated Credit Agreement, dated September 27, 2019, by and between the Company, as Borrower, certain subsidiaries of the Company identified therein, as Guarantors, Bank of America, N.A., as Administrative Agent, Swingline Lender and L/C Issuer, the Lenders party thereto and BofA Securities, Inc., as Sole Lead Arranger and Sole Bookrunner (filed as Exhibit 10.25 to our Form 10-K filed December 5, 2019 and incorporated herein by reference).

Exhibit 10.25 AMENDED AND RESTATED CREDIT AGREEMENT Dated as of September 27, 2019 among POWELL INDUSTRIES, INC., as the Borrower, CERTAIN SUBSIDIARIES OF THE BORROWER PARTY HERETO, as the Guarantors, BANK OF AMERICA, N.A., as Administrative Agent, Swingline Lender and L/C Issuer, and THE LENDERS PARTY HERETO BOFA SECURITIES, INC., as Sole Lead Arranger and Sole Bookrunner TABLE OF CONTENTS Page I

POWELL INDUSTRIES ANNOUNCES FISCAL 2019 FOURTH QUARTER RESULTS Fiscal Year 2019 New Orders Up 47% Versus Prior Year

EX-99.1 Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard /Natalie Hairston Dennard Lascar Investor Relations [email protected] 713-529-6600 POWELL INDUSTRIES ANNOUNCES FISCAL 2019 FOURTH QUARTER RESULTS Fiscal Year 2019 New Orders Up 47% Versus Prior Year HOUSTON — DECEMBER 4, 2019 — Powell Industries, Inc. (NA

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): December 4, 2019 POWELL INDUSTRIES, INC.

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): November 4, 2019 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Michael Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations [email protected] 713-529-6600 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON - November 4, 2019 - Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the manag

Entry into a Material Definitive Agreement, 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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): September 27, 2019 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES ANNOUNCES BRETT A. COPE TO ASSUME ROLE OF CHAIRMAN OF THE BOARD THOMAS W. POWELL TO ASSUME ROLE OF CHAIRMAN EMERITUS

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations [email protected] 713-529-6600 POWELL INDUSTRIES ANNOUNCES BRETT A. COPE TO ASSUME ROLE OF CHAIRMAN OF THE BOARD THOMAS W. POWELL TO ASSUME ROLE OF CHAIRMAN EMERITUS HOUSTON - September 23, 2019 - Powell Indust

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): September 23, 2019 POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. 10-Q - Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the quarterly period ended June 30, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indust

POWELL INDUSTRIES ANNOUNCES FISCAL 2019 THIRD QUARTER RESULTS Highest Backlog Since Fiscal 2016

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations [email protected] 713-529-6600 POWELL INDUSTRIES ANNOUNCES FISCAL 2019 THIRD QUARTER RESULTS Highest Backlog Since Fiscal 2016 HOUSTON — AUGUST 6, 2019 — Powell Industries, Inc. (NASDAQ: POWL), a leading suppli

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Mike Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations [email protected] 713-529-6600 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON - August 6, 2019 - Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: August 6, 2019 (Date of earliest event reported) POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. SD - - SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 8550 Mosley Road Houston, Texas 77075-1180 (Address of prin

Conflict Minerals Report for the calendar year ended December 31, 2018

Exhibit 1.01 Conflict Minerals Report For the Year Ended December 31, 2018 This is the Conflict Minerals Report (this “Report”) of Powell Industries, Inc. (referred to herein as, “Powell”, the “Company”, “we”, “us” or “our”) for calendar year 2018 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Please refer to Section 13(p) of the Exchange

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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): May 6, 2019 POWELL INDUSTRIES, INC.

First Amendment to Consulting and Advisory Services Agreement effective May 6, 2019 by and between the Company and Don R. Madison (filed as Exhibit 10.1 to our Form 8-K filed May 8, 2019 and incorporated herein by reference).

Exhibit 10.1 FIRST AMENDMENT TO CONSULTING AND ADVISORY SERVICES AGREEMENT This First Amendment to Consulting and Advisory Services Agreement (this "First Amendment") is made and entered into as of May 6, 2019 (the "Effective Date") by and between Powell Industries, Inc., its subsidiaries and affiliates (the "Company") and Don R. Madison (the "Consultant"). WHEREAS, the Company and the Consultant

POWL / Powell Industries, Inc. 10-Q Quarterly Report 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the quarterly period ended March 31, 2019 OR ¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the transition period from to Commission File Number 001-12488 Powell Indus

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

EX-99.2 3 ex992-q219powldividendanno.htm EXHIBIT 99.2 Exhibit 99.2 PRESS RELEASE FOR IMMEDIATE RELEASE Contact: Mike Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations 713-529-6600 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON - May 7, 2019 - Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered

POWELL INDUSTRIES ANNOUNCES FISCAL 2019 SECOND QUARTER RESULTS 2Q FISCAL 2019 BOOK TO BILL 1.6

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations 713-529-6600 POWELL INDUSTRIES ANNOUNCES FISCAL 2019 SECOND QUARTER RESULTS 2Q FISCAL 2019 BOOK TO BILL 1.6 HOUSTON — MAY 7, 2019 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered sol

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: May 7, 2019 (Date of earliest event reported) POWELL INDUSTRIES, INC.

Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 20, 2019 POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. / VANGUARD GROUP INC Passive Investment

powellindustriesinc.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.: 0 )* Name of issuer: Powell Industries Inc Title of Class of Securities: Common Stock CUSIP Number: 739128106 Date of Event Which Requires Filing of this Statement: December 31, 2018 Check the appropriat

POWL / Powell Industries, Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* POWELL INDUSTRIES INC (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (CUSIP Number) December 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

POWL / Powell Industries, Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2018 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 001-12488 Powell

POWELL INDUSTRIES ANNOUNCES FISCAL 2019 FIRST QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE Contacts: Michael W. Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations 713-529-6600 POWELL INDUSTRIES ANNOUNCES FISCAL 2019 FIRST QUARTER RESULTS HOUSTON — FEBRUARY 5, 2019 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distributio

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: February 5, 2019 (Date of earliest event reported) POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE Contact: Mike Metcalf, CFO Powell Industries, Inc. 713-947-4422 Ken Dennard / Natalie Hairston Dennard Lascar Investor Relations 713-529-6600 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — February 5, 2019 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical en

POWL / Powell Industries, Inc. / DEPRINCE RACE & ZOLLO INC - SCHEDULE 13G HOLDINGS REPORT Passive Investment

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

POWL / Powell Industries, Inc. 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: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Pro

POWL / Powell Industries, Inc. DEF 14A

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): December 19, 2018 POWELL INDUSTRIES, INC.

Consulting and Advisory Services Agreement effective January 5, 2019 by and between the Company and Don R. Madison (filed as Exhibit 10.1 to our Form 8-K filed December 21, 2018 and incorporated herein by reference).

Exhibit 10.1 CONSULTING AND ADVISORY SERVICES AGREEMENT This Consulting and Advisory Services Agreement (the "Agreement") is made and entered into as of January 5, 2019 (the "Effective Date") by and between Powell Industries, Inc., its subsidiaries and affiliates (the "Company") and Don R. Madison ("Consultant"), who was heretofore employed by the Company through January 4, 2019 as an officer purs

Subsidiaries of Powell Industries, Inc.

EXHIBIT 21.1 SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell International B.V. Netherlands Powell (UK) Limited United Kingdom Powell Industries Asia, Pte, Ltd. Singapore Powell Canada B.V. Netherlands Powell Canada Inc. Canada Nextron Limited Cana

POWL / Powell Industries, Inc. 10-K (Annual Report)

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 September 30, 2018 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 001-12488 Powell Industr

POWELL INDUSTRIES ANNOUNCES FISCAL 2018 FOURTH QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE Contacts: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES ANNOUNCES FISCAL 2018 FOURTH QUARTER RESULTS HOUSTON — DECEMBER 11, 2018 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced results for the fiscal 2018 fourth quart

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: December 11, 2018 (Date of earliest event reported) POWELL INDUSTRIES, INC.

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): November 5, 2018 POWELL INDUSTRIES, INC.

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.1 PRESS RELEASE Contact: Don R. Madison, CFO Powell Industries, Inc. FOR IMMEDIATE RELEASE 713-947-4422 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — November 5, 2018 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced that its Board of Directors has

POWELL INDUSTRIES NAMES NEW CHIEF FINANCIAL OFFICER

Exhibit 99.1 PRESS RELEASE FOR IMMEDIATE RELEASE Contacts: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES NAMES NEW CHIEF FINANCIAL OFFICER HOUSTON — October 31, 2018 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced that Michael W. Metcalf has be

Employment Agreement effective November 5, 2018 by and between the Company and Michael W. Metcalf (filed as Exhibit 10.1 to our Form 8-K filed November 1, 2018 and incorporated herein by reference)

Exhibit 10.1 EXECUTIVE EMPLOYMENT AGREEMENT THIS EMPLOYMENT AGREEMENT and an ancillary agreement to be effective simultaneously herewith entitled "Confidentiality, Non-Competition and Non-Solicitation Agreement" (the "Confidentiality Agreement"), a copy of which is attached hereto as Attachment A, and incorporated herein by reference for all purposes, (this agreement and the Confidentiality Agreem

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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (Date of earliest event reported): October 22, 2018 POWELL INDUSTRIES, INC.

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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: October 1, 2018 (Date of earliest event reported) POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2018 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 001-12488 Powell Indu

POWELL INDUSTRIES ANNOUNCES FISCAL 2018 THIRD QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE Contacts: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES ANNOUNCES FISCAL 2018 THIRD QUARTER RESULTS HOUSTON — AUGUST 7, 2018 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced results for the fiscal 2018 third quarter en

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE Contact: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — August 7, 2018 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced that its Board of Directors has declared a quarterly cas

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: August 7, 2018 (Date of earliest event reported) POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM SD Specialized Disclosure Report Powell Industries, Inc. (Exact name of registrant as specified in its charter) Delaware 001-12488 88-0106100 (State or other jurisdiction of incorporation or organization) (Commission File No.) (I.R.S. Employer Identification No.) 8550 Mosley Road Houston, Texas 77075-1180 (Address of prin

Conflict Minerals Report for the calendar year ended December 31, 2017

Exhibit 1.01 Conflict Minerals Report For the Year Ended December 31, 2017 This is the Conflict Minerals Report (this Report) of Powell Industries, Inc. (referred to herein as Powell, the Company, we, us or our) for calendar year 2017 in accordance with Rule 13p-1 under the Securities Exchange Act of 1934, as amended (the Exchange Act). Please refer to Section 13(p) of the Exchange Act and the gen

POWELL INDUSTRIES ANNOUNCES CFO RETIREMENT PLAN

Exhibit 99.1 PRESS RELEASE Contact: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES ANNOUNCES CFO RETIREMENT PLAN HOUSTON — May 14, 2018 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced that Don R. Madison, Executive Vice President and Chief Finan

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, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: May 11, 2018 (Date of earliest event reported) POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2018 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 001-12488 Powell Ind

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: May 8, 2018 (Date of earliest event reported) POWELL INDUSTRIES, INC.

POWELL INDUSTRIES ANNOUNCES FISCAL 2018 SECOND QUARTER RESULTS

Exhibit 99.1 PRESS RELEASE Contacts: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES ANNOUNCES FISCAL 2018 SECOND QUARTER RESULTS HOUSTON — MAY 8, 2018 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced results for the fiscal 2018 second quarter end

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit 99.2 PRESS RELEASE Contact: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON — May 8, 2018 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced that its Board of Directors has declared a quarterly cash d

POWL / Powell Industries, Inc. 8-K (Current Report)

Document UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: February 21, 2018 (Date of earliest event reported) POWELL INDUSTRIES, INC.

POWL / Powell Industries, Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* POWELL INDUSTRIES INC (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this S

POWL / Powell Industries, Inc. / HEARTLAND ADVISORS INC - AMENDMENT NO. 1 TO SCHEDULE 13G Passive Investment

SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* POWELL INDUSTRIES, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (CUSIP Number) January 31, 2018 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant t

POWL / Powell Industries, Inc. 10-Q (Quarterly Report)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ý QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended December 31, 2017 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 001-12488 Powell

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

Document UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: February 6, 2018 (Date of earliest event reported) POWELL INDUSTRIES, INC.

POWELL INDUSTRIES ANNOUNCES FISCAL 2018 FIRST QUARTER RESULTS

Exhibit Exhibit 99.1 PRESS RELEASE Contacts: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES ANNOUNCES FISCAL 2018 FIRST QUARTER RESULTS HOUSTON ? FEBRUARY 6, 2018 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced results for the fiscal 2018 first

POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND

Exhibit Exhibit 99.2 PRESS RELEASE Contact: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES DECLARES QUARTERLY CASH DIVIDEND HOUSTON ? February 6, 2018 ? Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced that its Board of Directors has declared a qua

POWL / Powell Industries, Inc. / HEARTLAND ADVISORS INC - SCHEDULE 13G Passive Investment

SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* POWELL INDUSTRIES, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 739128106 (CUSIP Number) December 31, 2017 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant t

POWL / Powell Industries, Inc. 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 (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(e)(2))

POWL / Powell Industries, Inc. DEF 14A

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Current Report

Form 8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: December 20, 2017 (Date of earliest event reported) POWELL INDUSTRIES, INC.

SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell Industries Asia, Pte, Ltd. Delaware Powell Interna

EXHIBIT 21.1 SUBSIDIARIES OF POWELL INDUSTRIES, INC. Name of Subsidiary Incorporated Powell Industries, Inc. Delaware Powell Electrical Systems, Inc. Delaware Powell Industries International, Inc. Delaware Powell Industries Asia, Pte, Ltd. Delaware Powell International B.V. Netherlands Powell (UK) Limited United Kingdom Nextron Limited Canada Powell Canada B.V. Netherlands Powell Canada Inc. Canad

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

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 September 30, 2017 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 001-12488 Powell Industries, Inc. (Exact name of registran

POWELL INDUSTRIES ANNOUNCES FISCAL 2017 FOURTH QUARTER RESULTS

Exhibit Exhibit 99.1 PRESS RELEASE Contacts: Don R. Madison, CFO Powell Industries, Inc. 713-947-4422 POWELL INDUSTRIES ANNOUNCES FISCAL 2017 FOURTH QUARTER RESULTS HOUSTON — DECEMBER 5, 2017 — Powell Industries, Inc. (NASDAQ: POWL), a leading supplier of custom engineered solutions for the management, control and distribution of electrical energy, today announced results for the fiscal 2017 fourt

POWL / Powell Industries, Inc. 8-K (Current Report)

Document UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: December 5, 2017 (Date of earliest event reported) POWELL INDUSTRIES, INC.

Financial Statements and Exhibits, Other Events

Document UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT: November 7, 2017 (Date of earliest event reported) POWELL INDUSTRIES, INC.