NWPX director sells 4 shares at $110.79 each

A director of NWPX Infrastructure, Inc. reported a small Rule 10b5-1 planned sale of 4 shares, leaving him with 18,633 shares held directly.

Rhea-AI Filing Summary

NWPX Infrastructure, Inc. (NWPX) director Keith R. Larson reported selling 4 shares of common stock on September 3, 2026 in an open-market or private transaction at a weighted average price of $110.785 per share. After this sale, he held 18,633 shares directly. The sale was made under a Rule 10b5-1(c) trading plan adopted on May 18, 2026 and was executed in multiple trades at prices ranging from $110.12 to $111.66 per share.

Insider Trade Summary 10b5-1

Net Seller: 4 shares

Net Sell 1 txn

Insider LARSON KEITH R

Role Director

Sold 4 shs ($443.14)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	4	$110.785	$443.14

Holdings After Transaction: Common Stock — 18,633 shares (Direct)

Footnotes (2)

1. F1. Adoption date of referenced 10b5-1(c) plan is: 05-18-2026
2. F2. This transaction was executed in multiple trades at prices ranging from $110.12 to $111.66 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Key Figures

Shares sold: 4 shares Weighted average sale price: $110.785 per share Price range of trades: $110.12–$111.66 per share +2 more

5 metrics

Shares sold 4 shares Common stock sale reported for September 3, 2026

Weighted average sale price $110.785 per share Sale of 4 NWPX common shares on September 3, 2026

Price range of trades $110.12–$111.66 per share Multiple trades comprising the reported sale transaction

Shares held after transaction 18,633 shares Direct holdings of Keith R. Larson after the September 3, 2026 sale

Rule 10b5-1(c) plan adoption date May 18, 2026 Plan under which the September 3, 2026 sale was executed

Key Terms

Rule 10b5-1(c) plan, weighted average sale price, open market or private transaction

3 terms

Rule 10b5-1(c) plan regulatory

"Adoption date of referenced 10b5-1(c) plan is: 05-18-2026"

weighted average sale price financial

"The price reported reflects the weighted average sale price"

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

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

What insider transaction did NWPX director Keith R. Larson report on this Form 4 for NWPX?

He reported a sale of 4 shares of NWPX common stock on September 3, 2026, executed as an open-market or private transaction under a Rule 10b5-1(c) trading plan.

At what price were the NWPX shares sold in this Form 4 transaction?

The filing reports a weighted average sale price of $110.785 per share, with individual trades executed at prices ranging from $110.12 to $111.66 per share.

How many NWPX shares does the reporting person hold after this Form 4 sale?

After the reported sale, Keith R. Larson directly held 18,633 shares of NWPX Infrastructure, Inc. common stock, as stated in the filing.

Was the NWPX insider sale made under a Rule 10b5-1 trading plan?

Yes. The sale was made pursuant to a Rule 10b5-1(c) trading plan, with an adoption date of May 18, 2026, according to the footnote in the Form 4.

How many shares in total were sold in this NWPX Form 4 transaction?

The transaction involved the sale of 4 shares of NWPX common stock, as reflected in the non-derivative transaction table and summary data.

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

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Available on EDGAR 09/04/2026 - 11:31 AM EDT Accepted by SEC EDGAR 09/04/2026 - 11:31 AM EDT 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).

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^*

LARSON KEITH R

(Last) (First) (Middle)

201 NE PARK PLAZA DRIVE SUITE 100

(Street)

VANCOUVER WASHINGTON 98684

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
NWPX Infrastructure, Inc. [ NWPX ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2026

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	09/03/2026		S(1)		4(1)	D	$110.785(2)	18,633	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. Adoption date of referenced 10b5-1(c) plan is: 05-18-2026

2. This transaction was executed in multiple trades at prices ranging from $110.12 to $111.66 per share. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

	/s/ Megan Kendrick	09/03/2026
	** 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)