POWL

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 17

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,259

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F15 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $537.45-$537.61, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 16

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,459

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F14 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $536.37-$537.20, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 15

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,852

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F13 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $535.26-$536.06, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 14

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,092

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F12 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $534.09-$534.95, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 13

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,212

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 12

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,252

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 11

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,292

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 10

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,332

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F11 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $522.72-$523.00, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 9

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,452

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F10 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $521.68-$522.65, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 8

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,656

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F9 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $520.36-$521.30, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 7

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,856

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F8 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $519.31-$519.93, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 6

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,096

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F7 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $518.27-$519.26, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 5

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,298

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F6 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $517.12-$517.78, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 4

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,460

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F5 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $515.68-$516.55, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 3

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,600

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F4 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $513.04-$513.09, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 2

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,680

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F3 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $511.75-$511.76, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000056 · wk-form4_1775160706.xml · nonDerivative · entry 1

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,760

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 2, 2025.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0001219199-26-000004 · primary_doc.xml · nonDerivative · entry 1

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 598,694

F1 · kind: The reporting person contributed 49,778 shares of POWL common stock to an exchange fund in exchange for shares of the exchange fund. The POWL common stock was valued at $502.23 per share for the purpose of determining the number of shares of the exchange fund issuable to the reporting person.

F1 · price: The reporting person contributed 49,778 shares of POWL common stock to an exchange fund in exchange for shares of the exchange fund. The POWL common stock was valued at $502.23 per share for the purpose of determining the number of shares of the exchange fund issuable to the reporting person.

SEC source: 0000080420-26-000050 · wk-form4_1773691272.xml · nonDerivative · entry 1

COPE BRETT ALAN · CIK 0001663174 · Director · President & CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 169,291

F1 · shares: The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 26, 2025.

F2 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0001219199-26-000003 · primary_doc.xml · nonDerivative · entry 2

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · By KRP 2025 Revocable Trust

Disclosed balance after: 6,000

F1 · kind: This transaction involved the reporting person's gift of 2,000 shares of POWL common stock to the KRP 2025 Revocable Trust, a trust established for the benefit of the reporting person's spouse ("Spousal Trust"). The reporting person disclaims beneficial ownership of the securities held by the Spousal Trust, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

F2 · ownership.nature: These shares are held directly by the Spousal Trust. The reporting person's spouse is the sole trustee of the Spousal Trust.

F3 · ownership.nature: For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the reporting person disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed an admission that such reporting person is the beneficial owner of such securities for purposes of Section 16 or otherwise.

SEC source: 0001219199-26-000003 · primary_doc.xml · nonDerivative · entry 1

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 648,472

F1 · kind: This transaction involved the reporting person's gift of 2,000 shares of POWL common stock to the KRP 2025 Revocable Trust, a trust established for the benefit of the reporting person's spouse ("Spousal Trust"). The reporting person disclaims beneficial ownership of the securities held by the Spousal Trust, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 or for any other purpose.

SEC source: 0001219199-26-000002 · primary_doc.xml · nonDerivative · entry 5

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 650,472

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $560.00 to $560.50, inclusive.

SEC source: 0001219199-26-000002 · primary_doc.xml · nonDerivative · entry 4

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 650,790

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $563.275 to $564.080, inclusive.

SEC source: 0001219199-26-000002 · primary_doc.xml · nonDerivative · entry 3

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 650,914

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $562.00 to $562.520, inclusive.

SEC source: 0001219199-26-000002 · primary_doc.xml · nonDerivative · entry 2

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 651,137

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $561.00 to $561.980, inclusive.

SEC source: 0001219199-26-000002 · primary_doc.xml · nonDerivative · entry 1

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 651,549

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $560.00 to $560.980, inclusive.

SEC source: 0000080420-26-000048 · wk-form4_1771539286.xml · nonDerivative · entry 1

McGill James W · CIK 0001299345 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,360

F1 · shares: Represents shares of restricted stock that have been granted to the Reporting Person as compensation for serving on the Powell Industries Board of Directors under the Non-Employee Director Equity Incentive Plan. These shares vest on the earlier of the first anniversary from the date of the grant or the Company's 2027 Annual Stockholder Meeting.

F2 · shares: RSUs convert into common stock on a one-for-one basis at the time of vesting.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000045 · wk-form4_1771539172.xml · nonDerivative · entry 1

CURTIS KATHERYN BAUCOM · CIK 0001803962 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,960

F1 · shares: Represents shares of restricted stock that have been granted to the Reporting Person as compensation for serving on the Powell Industries Board of Directors under the Non-Employee Director Equity Incentive Plan. These shares vest on the earlier of the first anniversary from the date of the grant or the Company's 2027 Annual Stockholder Meeting.

F2 · shares: RSUs convert into common stock on a one-for-one basis at the time of vesting.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000041 · wk-form4_1771538992.xml · nonDerivative · entry 1

Singh Mohit · CIK 0001897234 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,360

F1 · shares: Represents shares of restricted stock that have been granted to the Reporting Person as compensation for serving on the Powell Industries Board of Directors under the Non-Employee Director Equity Incentive Plan. These shares vest on the earlier of the first anniversary from the date of the grant or the Company's 2027 Annual Stockholder Meeting.

F2 · shares: RSUs convert into common stock on a one-for-one basis at the time of vesting.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0001528727-26-000002 · wk-form4_1771538935.xml · nonDerivative · entry 1

Smith Mark W. · CIK 0001528727 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 430

F1 · shares: Represents shares of restricted stock that have been granted to the Reporting Person as compensation for serving on the Powell Industries Board of Directors under the Non-Employee Director Equity Incentive Plan. These shares vest on the earlier of the first anniversary from the date of the grant or the Company's 2027 Annual Stockholder Meeting.

F2 · shares: RSUs convert into common stock on a one-for-one basis at the time of vesting.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000039 · wk-form4_1771538876.xml · nonDerivative · entry 1

Brooks Alaina K · CIK 0001631872 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,760

F1 · shares: Represents shares of restricted stock that have been granted to the Reporting Person as compensation for serving on the Powell Industries Board of Directors under the Non-Employee Director Equity Incentive Plan. These shares vest on the earlier of the first anniversary from the date of the grant or the Company's 2027 Annual Stockholder Meeting.

F2 · shares: RSUs convert into common stock on a one-for-one basis at the time of vesting.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000031 · wk-form4_1771537979.xml · nonDerivative · entry 1

Williams Richard E · CIK 0001668421 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,960

F1 · shares: Represents shares of restricted stock that have been granted to the Reporting Person as compensation for serving on the Powell Industries Board of Directors under the Non-Employee Director Equity Incentive Plan. These shares vest on the earlier of the first anniversary from the date of the grant or the Company's 2027 Annual Stockholder Meeting.

F2 · shares: RSUs convert into common stock on a one-for-one basis at the time of vesting.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000036 · wk-form4_1771538819.xml · nonDerivative · entry 1

Stacey John · CIK 0001428422 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,160

F1 · shares: Represents shares of restricted stock that have been granted to the Reporting Person as compensation for serving on the Powell Industries Board of Directors under the Non-Employee Director Equity Incentive Plan. These shares vest on the earlier of the first anniversary from the date of the grant or the Company's 2027 Annual Stockholder Meeting.

F2 · shares: RSUs convert into common stock on a one-for-one basis at the time of vesting.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0001219199-26-000001 · primary_doc.xml · nonDerivative · entry 6

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 651,949

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $600.00 to $600.190, inclusive.

SEC source: 0001219199-26-000001 · primary_doc.xml · nonDerivative · entry 5

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 652,069

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $602.55 to $602.600, inclusive.

SEC source: 0001219199-26-000001 · primary_doc.xml · nonDerivative · entry 4

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 652,149

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $601.00 to $601.945, inclusive.

SEC source: 0001219199-26-000001 · primary_doc.xml · nonDerivative · entry 3

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 658,469

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $600.00 to $600.820, inclusive.

SEC source: 0000080420-26-000024 · wk-form4_1770930490.xml · nonDerivative · entry 1

Ni Ping · CIK 0002024984 · Corp Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,023

F1 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0001219199-26-000001 · primary_doc.xml · nonDerivative · entry 2

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 666,980

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $593.00 to $593.840, inclusive.

SEC source: 0001219199-26-000001 · primary_doc.xml · nonDerivative · entry 1

POWELL THOMAS W · CIK 0001219199 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 669,289

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $592.00 to $592.970, inclusive.

SEC source: 0000080420-26-000023 · wk-form4_1770930450.xml · nonDerivative · entry 1

Eckenrode David L · CIK 0002025273 · Assistant Secretary/Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 443

F1 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000021 · wk-form4_1770758735.xml · nonDerivative · entry 1

Birchall John · CIK 0002025235 · Managing Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,567

F1 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000019 · wk-form4_1770672071.xml · nonDerivative · entry 4

McKertcher Terry B · CIK 0002025133 · Vice President, Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,433

F1 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000019 · wk-form4_1770672071.xml · nonDerivative · entry 3

McKertcher Terry B · CIK 0002025133 · Vice President, Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,933

F3 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $560.05-$560.34, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F1 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000019 · wk-form4_1770672071.xml · nonDerivative · entry 2

McKertcher Terry B · CIK 0002025133 · Vice President, Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,633

F2 · price: The price reported in Column 4 is an average price; shares were sold in multiple transactions. Reporting range is $555.74-$556.23, inclusive. Reporting person, upon request, will provide Powell Industries, Inc. or the staff of the Securities & Exchange Commission full information regarding the number of shares sold at each price within the ranges set for in this footnote.

F1 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000019 · wk-form4_1770672071.xml · nonDerivative · entry 1

McKertcher Terry B · CIK 0002025133 · Vice President, Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,933

F1 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000017 · wk-form4_1770239457.xml · nonDerivative · entry 1

TUNINETTI DAVIDE · CIK 0002056270 · CHIEF HUMAN RESOURCE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,070

F1 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000008 · wk-form4_1767736207.xml · nonDerivative · entry 1

COPE BRETT ALAN · CIK 0001663174 · Director · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,771

F1 · shares: The awards, which were approved by the Board of Directors on January 3, 2026, supplement the restricted stock unit awards that, consistent with prior years, were granted to the executives on October 1, 2025.

F2 · price: Represents the average closing stock price from September 1, 2025 - September 30, 2025.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000006 · wk-form4_1767735998.xml · nonDerivative · entry 1

METCALF MICHAEL WILLIAM · CIK 0001760055 · Exec Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,800

F1 · shares: The awards, which were approved by the Board of Directors on January 3, 2026, supplement the restricted stock unit awards that, consistent with prior years, were granted to the executives on October 1, 2025.

F2 · price: Represents the average closing stock price from September 1, 2025 - September 30, 2025.

F3 · balance_after: Includes shares that have a time-based vesting provision.

SEC source: 0000080420-26-000005 · wk-form4_1767735921.xml · nonDerivative · entry 2

MUDGE FREDERICK N · CIK 0002025646 · Vice President, Operations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,921

F2 · price: Represents the average of the high and low stock price on 01/02/2026.