[Form 4] POWELL INDUSTRIES INC Insider Trading Activity

Rhea-AI Filing Summary

Powell Industries President & CEO Brett Alan Cope reported an open-market sale of Common Stock. He sold 4,440 shares on May 14, 2026 at $301.00 per share and held 490,113 shares directly after the transaction, including shares subject to time-based vesting.

The trade was executed under a Rule 10b5-1 trading plan adopted on November 26, 2025, indicating it was pre-arranged rather than discretionary. The reported share amounts reflect the company’s 3-for-1 forward stock split effective on April 2, 2026.

Insider Trade Summary 10b5-1

Net Seller: 4,440 shares ($1,336,440)

Net Sell 1 txn

Insider COPE BRETT ALAN

Role President & CEO

Sold 4,440 shs ($1.34M)

Type	Security	Shares	Price	Value
Sale	Common Stock	4,440	$301.00	$1.34M

Holdings After Transaction: Common Stock — 490,113 shares (Direct, null)

Footnotes (1)

1. 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. Includes shares that have a time-based vesting provision. The reported number of shares have been adjusted to reflect the impact of the issuer's 3-for-1 forward split of its Common Stock effected on April 2, 2026.

Key Figures

Shares sold: 4,440 shares Sale price: $301.00 per share Shares held after: 490,113 shares +3 more

6 metrics

Shares sold 4,440 shares Open-market sale on May 14, 2026

Sale price $301.00 per share Common Stock transaction

Shares held after 490,113 shares Direct ownership following transaction

Net shares sold 4,440 shares Net-sell direction in transaction summary

Trading plan adoption date November 26, 2025 Rule 10b5-1 plan adoption

Stock split ratio 3-for-1 forward split Effective April 2, 2026

Key Terms

Rule 10b5-1 trading plan, time-based vesting provision, 3-for-1 forward split, Common Stock

4 terms

Rule 10b5-1 trading plan financial

"The sales reported in this Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted..."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

time-based vesting provision financial

"Includes shares that have a time-based vesting provision."

3-for-1 forward split financial

"adjusted to reflect the impact of the issuer's 3-for-1 forward split of its Common Stock..."

Common Stock financial

"security_title: "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

COPE BRETT ALAN

(Last) (First) (Middle)

8550 MOSLEY ROAD

(Street)

HOUSTON TEXAS 77075

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
POWELL INDUSTRIES INC [ POWL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/14/2026	05/14/2026	S		4,440(1)	D	$301	490,113(2)(3)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. Includes shares that have a time-based vesting provision.

3. The reported number of shares have been adjusted to reflect the impact of the issuer's 3-for-1 forward split of its Common Stock effected on April 2, 2026.

Remarks:

	Michael W. Metcalf, Power of Attorney for Brett A. Cope	05/15/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)