NWPX director sells 1,000 shares at $102.31

The sale was reported under a Rule 10b5-1(c) plan adopted May 18, 2026, with trades priced from $100.46 to $103.74 per share.

Available on EDGAR 09/23/2026 - 11:08 AM EDT Accepted by SEC EDGAR 09/23/2026 - 11:08 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

NWPX Infrastructure, Inc. director Keith R. Larson sold 1,000 common shares on September 21, 2026. The shares were sold in multiple trades priced from $100.46 to $103.74 per share; the reported $102.31 per-share price is the weighted average. The sale was made under a Rule 10b5-1(c) plan adopted May 18, 2026. Larson directly held 15,633 shares after the transaction.

Insider Trade Summary 10b5-1

Net Seller: 1,000 shares

Net Sell 1 txn

Insider LARSON KEITH R

Role Director

Sold 1,000 shs ($102K)

Share of Position Sold 6.0%

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	1,000	$102.31	$102K

Holdings After Transaction: Common Stock — 15,633 shares (Direct)

Holdings Before and After: Common Stock, 16,633 to 15,633 shares (Direct)

Other Insiders: 5 other insiders reported open-market sales of this stock in the 30 days up to this filing.

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 $100.46 to $103.74 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: 1,000 shares Weighted average sale price: $102.31 per share Trade price range: $100.46-$103.74 per share +2 more

5 metrics

Shares sold 1,000 shares September 21, 2026

Weighted average sale price $102.31 per share Sale on September 21, 2026

Trade price range $100.46-$103.74 per share Multiple trades

Direct shares after transaction 15,633 shares Following the September 21, 2026 sale

Rule 10b5-1(c) plan adoption date May 18, 2026 Plan referenced for the sale

Key Terms

Rule 10b5-1(c) plan, weighted average sale price, Sale in 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"

Sale in 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.

How many NWPX shares did director Keith R. Larson sell?

Keith R. Larson sold 1,000 common shares on September 21, 2026.

What was the reported price for the NWPX share sale?

The reported weighted average sale price was $102.31 per share. The trades were priced from $100.46 to $103.74 per share.

How many NWPX shares did Keith R. Larson hold after the sale?

Larson directly held 15,633 shares after the transaction.

Was Keith R. Larson's NWPX sale made under a trading plan?

Yes. The sale was made under a Rule 10b5-1(c) plan adopted May 18, 2026.

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

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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)
09/21/2026

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	09/21/2026		S(1)		1,000(1)	D	$102.31(2)	15,633	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 $100.46 to $103.74 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	09/22/2026
	** 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)