NWPX Infrastructure, Inc.

During thethree months ended* September* 30, 2025, none of our directors or officers adopted, modified, or terminated a Rule10b5‑1 trading arrangement or a non-Rule10b5‑1 trading arrangement, as such terms are defined under Item408(a) of Regulation S‑K, except as follows:

On* August12,* 2025, Scott Montross, our President and Chief Executive Officer, adopted a Rule10b5‑1 trading arrangement for the sale of shares of our common stock, which is intended to satisfy the affirmative defense conditions of Rule10b5‑1(c) under the Exchange Act. Mr. Montross’ Rule10b5‑1 trading arrangement provides for the potential sale of up to 8,210 shares of our common stock between* November11,* 2025 and* February**25,* 2026, so long as the market price of our common stock is higher than certain minimum threshold prices specified in Mr. Montross’ Rule10b5‑1 trading arrangement.

On* August15,* 2025, Miles Brittain, our Executive Vice President, adopted a Rule10b5‑1 trading arrangement for the sale of shares of our common stock, which is intended to satisfy the affirmative defense conditions of Rule10b5‑1(c) under the Exchange Act. Mr. Brittain’s Rule10b5‑1 trading arrangement provides for the potential sale of up to 8,000 shares of our common stock between* November14,* 2025 and* February**27,* 2026, so long as the market price of our common stock is higher than certain minimum threshold prices specified in Mr. Brittain’s Rule10b5‑1 trading arrangement.

On* September5,* 2025, Michael Franson, amember of our Board of Directors, adopted a Rule10b5‑1 trading arrangement for the sale of shares of our common stock, which is intended to satisfy the affirmative defense conditions of Rule10b5‑1(c) under the Exchange Act. Mr. Franson’s Rule10b5‑1 trading arrangement provides for the potential sale of up to 5,506 shares of our common stock between* December5,* 2025 and* September**4,* 2026, so long as the market price of our common stock is higher than certain minimum threshold prices specified in Mr. Franson’s Rule10b5‑1 trading arrangement.

On* September8,* 2025, Aaron Wilkins, our Senior Vice President, Chief Financial Officer, and Corporate Secretary, adopted a Rule10b5‑1 trading arrangement for the sale of shares of our common stock, which is intended to satisfy the affirmative defense conditions of Rule10b5‑1(c) under the Exchange Act. Mr. Wilkins’ Rule10b5‑1 trading arrangement provides for the potential sale of up to 6,285 shares of our common stock between* December8,* 2025 and* February**20,* 2026, so long as the market price of our common stock is higher than certain minimum threshold prices specified in Mr. Wilkins’ Rule10b5‑1 trading arrangement.