Was Keith R. Larson’s NWPX share sale under a Rule 10b5-1 plan?

Yes. The filing affirms that the transaction was made pursuant to a Rule 10b5-1(c) trading plan, with a disclosed adoption date of 05-18-2026 noted in the footnote.

NWPX director sells 1,250 company shares

Q: What insider transaction did NWPX (NWPX) director Keith R. Larson report?

Keith R. Larson reported a sale of 1,250 shares of NWPX common stock on 2026-08-24 in an open market or private transaction, as indicated by transaction code S.

Q: At what price were the NWPX shares sold in Keith R. Larson’s Form 4?

The reported sale used a weighted average price of $110.3156 per share, with individual trades executed at prices ranging from $110.07 to $110.76 per share, according to the footnote.

Q: Does the Form 4 indicate whether the NWPX sale was direct or indirect ownership?

The transaction is reported as direct ownership, with the ownership code D and no separate entity listed in the nature of ownership field.

NWPX Infrastructure, Inc. insider Keith R. Larson, a director of the company, reported a sale of 1,250 shares of common stock on 2026-08-24.

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Filing Sentiment

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Form Type

Rhea-AI Filing Summary

NWPX Infrastructure, Inc. insider Keith R. Larson, a director of the company, reported a sale of 1,250 shares of common stock on 2026-08-24. The sale was executed at a weighted average price of $110.3156 per share, with individual trade prices ranging from $110.07 to $110.76 per share. After this transaction, Larson directly held 19,883 shares of NWPX common stock. The transaction is affirmed as made pursuant to a Rule 10b5-1(c) trading plan with an adoption date of 05-18-2026.

Insider Trade Summary 10b5-1

Net Seller: 1,250 shares

Net Sell 1 txn

Insider LARSON KEITH R

Role Director

Sold 1,250 shs ($138K)

Type	Security	Shares	Price	Value
Sale	Common Stock ^{F1, F2}	1,250	$110.3156	$138K

Holdings After Transaction: Common Stock — 19,883 shares (Direct)

Footnotes (2)

F1. Adoption date of referenced 10b5-1(c) plan is: 05-18-2026
F2. This transaction was executed in multiple trades at prices ranging from $110.07 to $110.76 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: 1,250 shares Weighted average sale price: $110.3156 per share Sale price range: $110.07–$110.76 per share +2 more

5 metrics

Shares sold 1,250 shares Common Stock sold on 2026-08-24 by director Keith R. Larson

Weighted average sale price $110.3156 per share Weighted average price for the 1,250 shares sold

Sale price range $110.07–$110.76 per share Range of prices for multiple trades in the reported sale

Shares owned after transaction 19,883 shares Directly held NWPX common stock following the sale

Rule 10b5-1(c) plan adoption date 05-18-2026 Adoption date of the trading plan covering this sale

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 market

"transaction_code_description: 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 (NWPX) director Keith R. Larson report?

Keith R. Larson reported a sale of 1,250 shares of NWPX common stock on 2026-08-24 in an open market or private transaction, as indicated by transaction code S.

At what price were the NWPX shares sold in Keith R. Larson’s Form 4?

The reported sale used a weighted average price of $110.3156 per share, with individual trades executed at prices ranging from $110.07 to $110.76 per share, according to the footnote.

How many NWPX shares does Keith R. Larson hold after this transaction?

Following the reported sale, Keith R. Larson directly holds 19,883 shares of NWPX Infrastructure, Inc. common stock, as stated in the filing’s post-transaction holdings field.

Does the Form 4 indicate whether the NWPX sale was direct or indirect ownership?

The transaction is reported as direct ownership, with the ownership code D and no separate entity listed in the nature of ownership field.

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

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Available on EDGAR 08/25/2026 - 04:06 PM EDT Accepted by SEC EDGAR 08/25/2026 - 04:05 PM EDT

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^*

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)
08/24/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	08/24/2026		S⁽¹⁾		1,250⁽¹⁾	D	$110.3156⁽²⁾	19,883	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 $110.07 to $110.76 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	08/25/2026
	** 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)

Source: View Original Filing on SEC EDGAR