Other Events. On November 3, 2026, Powell Industries, Inc. (NASDAQ: POWL) (the “Company”) issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.09 per share payable to shareholders of record at the close of business on November 18, 2026. This dividend will be paid on December 16, 2026. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Other Events. On August 3, 2026, the Company also issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.09 per share payable to shareholders of record at the close of business on August 19, 2026. This dividend will be paid on September 16, 2026. A copy of the press release is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

The filing describes a special equity award to the CEO for retention purposes.

Other Events. On May 5, 2026, Powell Industries, Inc. (NASDAQ: POWL) (the “Company”) issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.09 per share payable to shareholders of record at the close of business on May 20, 2026. This dividend will be paid on June 17, 2026. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

Other Events. On February 3, 2026, the Company also issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.27 per share payable to shareholders of record at the close of business on February 18, 2026. This dividend will be paid on March 18, 2026. A copy of the press release is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

CEO — Brett A. Cope: The filing discloses the approval of annual restricted stock unit compensation awards for the CEO and CFO, which is a routine compensatory arrangement rather than a change in management personnel.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

Other Events. On November 4, 2025, Powell Industries, Inc. (NASDAQ: POWL) (the “Company”) issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.2675 per share payable to shareholders of record at the close of business on November 19, 2025. This dividend will be paid on December 17, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Other Events. On August 5, 2025, the Company also issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.2675 per share payable to shareholders of record at the close of business on August 20, 2025. This dividend will be paid on September 17, 2025. A copy of the press release is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

Director — Mark W. Smith: The filing discloses the appointment of a new director to a newly created seat, which is a routine board expansion rather than a departure of a senior executive.

Other Events. On May 6, 2025, the Company also issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.2675 per share payable to shareholders of record at the close of business on May 21, 2025. This dividend will be paid on June 18, 2025. A copy of the press release is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

Material Modification to Rights of Security Holders. The information set forth in

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

Other Events On February 4, 2025, Powell Industries, Inc. (NASDAQ: POWL) issued a press release announcing that its Board of Directors approved a quarterly cash dividend of $0.2675 per share payable to shareholders of record at the close of business on February 19, 2025. This dividend will be paid on March 19, 2025. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

Other Events On November 5, 2024, Powell Industries, Inc. (NASDAQ: POWL) issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.2650 per share payable to shareholders of record at the close of business on November 20, 2024. This dividend will be paid on December 18, 2024. A copy of the press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Other Events On July 30, 2024, the Company also issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.2650 per share payable to stockholders of record at the close of business on August 14, 2024. This dividend will be paid on September 18, 2024. A copy of the press release is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…

Other Events On April 30, 2024, the Company also issued a press release announcing that its Board of Directors declared a quarterly cash dividend of $0.2650 per share payable to stockholders of record at the close of business on May 15, 2024. This dividend will be paid on June 12, 2024. A copy of the press release is attached hereto as Exhibit 99.2 and is incorporated herein by reference.

of this Current Report on Form 8-K (“Current Report”) and Exhibit 99.1 attached hereto is being “furnished” and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified therein as being incorporated by refe…