NWPX director sells 1,000 shares at $101.12

A director of NWPX Infrastructure, Inc. sold 1,000 shares under a pre-arranged Rule 10b5-1 trading plan and now holds 16,633 shares directly.

Available on EDGAR 09/16/2026 - 02:53 PM EDT Accepted by SEC EDGAR 09/16/2026 - 02:53 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

NWPX Infrastructure, Inc. (NWPX) director Keith R. Larson reported selling 1,000 shares of common stock on September 14, 2026 in an open-market or private transaction at a weighted average price of $101.12 per share, executed in multiple trades between $100.39 and $102.19. After this sale, he directly holds 16,633 shares. The transaction was made pursuant to a Rule 10b5-1(c) trading plan adopted on May 18, 2026.

Insider Trade Summary 10b5-1

Net Seller: 1,000 shares

Net Sell 1 txn

Insider LARSON KEITH R

Role Director

Sold 1,000 shs ($101K)

Share of Position Sold 5.7%

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	1,000	$101.1194	$101K

Holdings After Transaction: Common Stock — 16,633 shares (Direct)

Holdings Before and After: Common Stock, 17,633 to 16,633 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 $100.39 to $102.19 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: $101.12 per share Trade price range: $100.39–$102.19 per share +2 more

5 metrics

Shares sold 1,000 shares Common stock sale reported for September 14, 2026

Weighted average sale price $101.12 per share Sale of 1,000 NWPX common shares

Trade price range $100.39–$102.19 per share Prices for multiple trades comprising the reported sale

Shares held after transaction 16,633 shares Director’s direct ownership following the sale

Rule 10b5-1(c) plan adoption date May 18, 2026 Plan under which the September 14, 2026 sale was made

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 report on this Form 4?

NWPX reported that director Keith R. Larson sold 1,000 shares of common stock on September 14, 2026 in a sale categorized as an open-market or private transaction.

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

The 1,000 NWPX shares were sold at a weighted average price of $101.12 per share, with individual trade prices ranging from $100.39 to $102.19 per share, as disclosed in the filing footnote.

How many NWPX shares does the director hold after this reported sale?

After the reported sale, director Keith R. Larson directly holds 16,633 shares of NWPX common stock, according to the Form 4 disclosure.

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

Yes. The filing states the transaction was made pursuant to a Rule 10b5-1(c) plan with an adoption date of May 18, 2026, and the Form 4 affirms Rule 10b5-1 status.

Who is the insider involved in this NWPX Form 4 transaction and what is his role?

The insider is Keith R. Larson, who is identified as a director of NWPX Infrastructure, Inc. in the Form 4 reporting this sale of common stock.

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)
09/14/2026

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	09/14/2026		S(1)		1,000(1)	D	$101.1194(2)	16,633	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 $100.39 to $102.19 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	09/16/2026
	** 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)