Powell Industries: John Birchall gets 400-share award

The reported per-share figures are stock-price averages tied to the dates and periods described in the footnotes.

Rhea-AI Filing Summary

Powell Industries (POWL) Managing Director John Birchall reported a 400-share award acquisition on October 1, 2026, and 599 shares delivered or withheld on September 30, 2026, for payment of exercise price or tax liability. The 400-share award count is adjusted for the issuer’s 3-for-1 forward split effected April 2, 2026.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Birchall John

Role Managing Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F3, F2, F4	400	$181.67	$73K
Exercise Price or Tax Liability	Common Stock F1, F2	599	$187.67	$112K

Holdings After Transaction: Common Stock — 19,502 shares (Direct)

Footnotes (4)

1. F1. Represents the average of the high and low stock price on 09/30/2026.
2. F2. Includes shares that have a time-based vesting provision.
3. F3. Represents the average closing stock price from September 1, 2026 - September 30, 2026.
4. F4. 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

Award shares acquired: 400 shares Shares delivered or withheld: 599 shares Average closing stock price: $181.67 per share +2 more

5 metrics

Award shares acquired 400 shares October 1, 2026; share count adjusted for the 3-for-1 forward split effected April 2, 2026

Shares delivered or withheld 599 shares September 30, 2026; for payment of exercise price or tax liability

Average closing stock price $181.67 per share Average from September 1, 2026, through September 30, 2026; associated with the award entry

Average of high and low stock price $187.67 per share September 30, 2026; associated with the delivery-or-withholding entry

Forward split ratio 3-for-1 Powell Industries Common Stock split effected April 2, 2026

Key Terms

time-based vesting, forward split, exercise price or tax liability, average closing stock price

4 terms

time-based vesting financial

"shares that have a time-based vesting provision"

Time-based vesting is a schedule that gives employees or contractors ownership of granted stock or options gradually as they remain with a company, like unlocking rewards in a loyalty program the longer you stick around. For investors, it matters because it affects future share supply, management incentives and staff retention — all of which can influence company performance and dilution of existing shareholders.

forward split financial

"3-for-1 forward split of its Common Stock"

A forward split increases the number of a company’s shares by exchanging each existing share for multiple new shares, so each investor owns more pieces while their overall ownership stake and the company’s value stay the same. Think of cutting a pizza into more slices: each slice is smaller but you still have the same total; for investors this lowers the per‑share price, can make the stock feel more affordable, and often boosts trading activity and accessibility.

exercise price or tax liability financial

"payment of exercise price or tax liability"

average closing stock price financial

"average closing stock price from September 1, 2026"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What POWL insider transactions did John Birchall report?

John Birchall, Managing Director, reported a 400-share award acquisition on October 1, 2026, and delivery or withholding of 599 shares for payment of exercise price or tax liability on September 30, 2026. The 400-share amount was adjusted for the issuer’s 3-for-1 forward split effected April 2, 2026.

What do the prices in John Birchall’s POWL Form 4 represent?

The 400-share award entry’s $181.67 per share represents the average closing stock price from September 1, 2026, through September 30, 2026; the 599-share delivery-or-withholding entry’s $187.67 per share represents the average of the high and low stock price on September 30, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/02/2026 - 04:36 PM Accepted by SEC EDGAR 10/02/2026 - 04:35 PM Learn about SEC filing dates

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).

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^*

Birchall John

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Managing Director

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2026

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	09/30/2026	10/01/2026	F		599	D	$187.67(1)	19,102(2)	D
Common Stock	10/01/2026	10/01/2026	A		400	A	$181.67(3)	19,502(2)(4)	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. Represents the average of the high and low stock price on 09/30/2026.

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

3. Represents the average closing stock price from September 1, 2026 - September 30, 2026.

4. 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 John Birchall	10/02/2026
	** 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)