A Form 4 filed with the SEC on August 18, 2026, discloses that Keith R. Larson, a director of NWPX Infrastructure, Inc. (NASDAQ:NWPX), sold 1,250 shares of common stock on August 17, 2026, under a pre-established Rule 10b5-1 trading plan.

Key Highlights

  • Reporting person: Keith R. Larson, listed as a Director of NWPX Infrastructure, Inc.
  • Shares sold: 1,250 shares of common stock disposed of (transaction code S) on August 17, 2026.
  • Weighted average price: $115.8631 per share, with individual trades ranging from $114.50 to $117.42 per share.
  • Remaining ownership: 21,133 shares of common stock held directly following the transaction.
  • 10b5-1 plan: The sale was made pursuant to a Rule 10b5-1(c) plan adopted on May 18, 2026.

Keith R. Larson's Share Sale Details and Remaining Position

According to the filing, Keith R. Larson, a director of NWPX Infrastructure, Inc., disposed of 1,250 shares of common stock on August 17, 2026. The transaction was executed under transaction code "S" (a sale) and carried out pursuant to a written plan established on May 18, 2026, intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Securities Exchange Act of 1934.

The filing reports a weighted average sale price of $115.8631 per share. As noted in the explanation of responses, the transaction was executed in multiple trades at prices ranging from $114.50 to $117.42 per share. The filing states that Larson "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."

Following the reported transaction, Larson directly owns 21,133 shares of NWPX Infrastructure common stock, according to the filing. No derivative securities transactions were reported. The form was signed by Megan Kendrick on August 18, 2026, on behalf of the reporting person.

What Was Disclosed

The filing discloses a director-level sale of 1,250 shares of NWPX Infrastructure common stock at a weighted average price of $115.8631, executed under a pre-established 10b5-1 plan, with 21,133 shares remaining directly held afterward.