William Marshall Mauney Jr. - 30 Sep 2025 Form 4 Insider Report for POWELL INDUSTRIES INC (POWL)

Role: Vice President, R&D
Signature: Michael W. Metcalf, Power of Attorney for William Marshall Mauney, Jr.
Issuer symbol: POWL
Transactions as of: 30 Sep 2025
Net transactions value: -$54,242
Form type: 4
Filing time: 01 Oct 2025, 17:07:31 UTC
Previous filing: 09 Sep 2025
Next filing: 03 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Mauney William Marshall Jr	Vice President, R&D	8550 MOSLEY ROAD, HOUSTON	Michael W. Metcalf, Power of Attorney for William Marshall Mauney, Jr.	01 Oct 2025	0002025220

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	POWL	Common Stock	Tax liability	$140,396	-466	-10%	$301.28	4,151	30 Sep 2025	Direct	F1, F2
transaction	POWL	Common Stock	Award	$86,154	+300	+7.2%	$287.18	4,451	01 Oct 2025	Direct	F2, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the average of the high and low stock price on 09/30/2025.
F2	Includes shares that have a time-based vesting provision.
F3	Represents the average closing stock price from September 1, 2025 - September 30, 2025.