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  4. [Form 4] NWPX Infrastructure, Inc. Insider Trading Activity

NWPX CEO sells 1,227 shares at $110.58 avg

After Scott J. Montross’s Aug. 31 sale, he still holds 69,902 shares, plus RSUs and performance shares vesting through 2029.

Filing Impact
(High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

NWPX Infrastructure, Inc. (NWPX) reports that President & CEO Scott J. Montross sold 1,227 shares of common stock on August 31, 2026 at a weighted-average price of $110.58 per share in open-market transactions made under a Rule 10b5-1(c) trading plan adopted May 5, 2026. Following the sale, he directly holds 69,902 common shares, plus equity awards covering 13,305 underlying shares from Restricted Stock Units that vest in installments in January 2027, 2028 and 2029, and 39,916 underlying shares from Performance Shares that may be earned at 0–200% of target based on NWPX’s total EBITDA margin and vest in installments in March 2027, 2028 and 2029.

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Insider MONTROSS SCOTT J
Role President & CEO
Sold 1,227 shs ($136K)
Type Security Shares Price Value
Sale Common Stock F1, F2 1,227 $110.581 $136K
holding Restricted Stock Units F3, F4 -- -- --
holding Performance Shares F5, F6 -- -- --
Holdings After Transaction: Common Stock — 69,902 shares (Direct); Restricted Stock Units — 13,305 contracts (Direct); Performance Shares — 39,916 contracts (Direct)
Footnotes (6)
  1. F1. Adoption date of referenced 10b5-1(c) plan is: 05/05/2026
  2. F2. This transaction was executed in multiple trades at prices ranging from $110.0100 to $111.2200 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.
  3. F3. Each Restricted Stock Unit represents a contingent right to receive one share of NWPX common stock.
  4. F4. The Restricted Stock Units vest in installments in January of 2027, 2028 and 2029.
  5. F5. Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on NWPX's total EBITDA margin over the measurement period.
  6. F6. The Performance Shares vest in installments in March of 2027, 2028 and 2029.
Shares sold 1,227 shares Common stock sale by President & CEO on August 31, 2026
Weighted-average sale price $110.58 per share Open-market sale of 1,227 NWPX common shares
Sale price range $110.01–$111.22 per share Multiple trades on August 31, 2026
Common shares held after transaction 69,902 shares Direct NWPX common stock ownership after August 31, 2026 sale
Restricted Stock Units underlying shares 13,305 shares RSUs each representing one NWPX common share
Performance Shares underlying shares 39,916 shares Performance Shares tied to NWPX common stock
Performance Shares earnout range 0–200% Earned based on NWPX total EBITDA margin
Rule 10b5-1 plan adoption date May 5, 2026 Plan governing the reported August 31, 2026 sale
Rule 10b5-1(c) plan regulatory
"Adoption date of referenced 10b5-1(c) plan is: 05/05/2026"
Restricted Stock Unit financial
"Each Restricted Stock Unit represents a contingent right to receive one share"
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
Performance Shares financial
"Performance Shares vest in an amount ranging from 0-200% to the extent"
Performance shares are a type of company stock given to executives or employees that only become theirs if the company meets specific goals, like hitting certain profits or growth targets. They motivate leaders to work toward the company’s success, because their additional shares depend on achieving these results.
EBITDA margin financial
"Performance Shares are earned based on NWPX's total EBITDA margin over"
EBITDA margin is the share of each dollar of sales that a company keeps as operating cash profit before interest, taxes, and accounting for equipment wear and long-term investments. Think of it like the cash a store has left from every sale after paying day-to-day running costs but before paying rent, loan interest or replacing old machinery. Investors use it to compare core profitability and operational efficiency across companies by removing financing and accounting differences.
weighted average sale price financial
"The price reported reflects the weighted average sale price"

FAQ

What insider transaction did NWPX President & CEO Scott J. Montross report on this Form 4?
Scott J. Montross reported selling 1,227 shares of NWPX common stock on August 31, 2026 in open-market transactions at a weighted-average price of $110.58 per share, executed in multiple trades within a price range of $110.01–$111.22.

How many NWPX common shares does Scott J. Montross hold after this reported sale?
After the reported sale, Scott J. Montross directly holds 69,902 shares of NWPX common stock. This figure is disclosed as his total direct common stock ownership following the August 31, 2026 transaction.

Was the NWPX insider sale by Scott J. Montross made under a Rule 10b5-1 trading plan?
Yes. The filing states the sale was made under a Rule 10b5-1(c) plan with an adoption date of May 5, 2026. Such plans pre-establish trading parameters for insiders’ transactions.

What Restricted Stock Units does Scott J. Montross hold in NWPX and when do they vest?
He holds Restricted Stock Units covering 13,305 underlying NWPX common shares. Each unit represents a right to one share, and the units vest in installments in January 2027, January 2028, and January 2029.

What Performance Shares tied to NWPX does Scott J. Montross hold and what are the performance conditions?
He holds Performance Shares covering 39,916 underlying NWPX common shares. They may be earned from 0–200% of target based on NWPX’s total EBITDA margin over a measurement period and vest in installments in March 2027, 2028, and 2029.

What was the trading price range for Scott J. Montross’s NWPX share sale?
The sale was executed in multiple trades at prices ranging from $110.01 to $111.22 per share. The reported $110.58 figure is the weighted-average sale price across those trades.

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SEC Form 4
FORM 4UNITED 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*
MONTROSS SCOTT J
(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)
Director10% Owner
XOfficer (give title below)Other (specify below)
President & CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/31/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock08/31/2026S(1)1,227(1)D$110.581(2)69,902D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Restricted Stock Units(3) (4) (4)Common Stock13,305(3)13,305D
Performance Shares(5) (6) (6)Common Stock39,916(5)39,916D
Explanation of Responses:
1. Adoption date of referenced 10b5-1(c) plan is: 05/05/2026
2. This transaction was executed in multiple trades at prices ranging from $110.0100 to $111.2200 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.
3. Each Restricted Stock Unit represents a contingent right to receive one share of NWPX common stock.
4. The Restricted Stock Units vest in installments in January of 2027, 2028 and 2029.
5. Performance Shares vest in an amount ranging from 0-200% to the extent such Performance Shares are earned. Performance Shares are earned based on NWPX's total EBITDA margin over the measurement period.
6. The Performance Shares vest in installments in March of 2027, 2028 and 2029.
/s/ Megan Kendrick09/01/2026
** Signature of Reporting PersonDate
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