As of September 09, 2026, the three largest insider holders of NWPX are Scott J Montross (President Ceo, 69.90K shares), William M Smith (Exec Vp, Water Transmission, 38.61K shares), William M Smith (Exec Vp, Water Transmission, 38.61K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Scott J Montross | President Ceo | 69,902 | 0 | 69,902 | 20.3% | 01 Sep, 2026 |
| 2 | William M Smith | Exec Vp, Water Transmission | 38,609 | 0 | 38,609 | 11.2% | 04 Apr, 2022 |
| 3 | Eric Stokes | Svp And Group President Of Wts | 37,627 | 0 | 37,627 | 10.9% | 02 Apr, 2026 |
| 4 | Richard A Roman | Exec Chairman Of The Board | 34,340 | 0 | 34,340 | 10.0% | 12 Jun, 2026 |
| 5 | Miles Brittain | Executive Vice President | 0 | 26,274 | 26,274 | 7.6% | 02 Apr, 2026 |
| 6 | Aaron Wilkins | Cfo | 25,898 | 0 | 25,898 | 7.5% | 11 Aug, 2026 |
| 7 | Michael Wray | Executive Vice President | 23,286 | 0 | 23,286 | 6.8% | 27 Aug, 2026 |
| 8 | Michael C Franson | Director | 19,424 | 0 | 19,424 | 5.6% | 12 Jun, 2026 |
| 9 | Keith R Larson | Director | 18,633 | 0 | 18,633 | 5.4% | 03 Sep, 2026 |
| 10 | John Paschal | Director | 17,098 | 0 | 17,098 | 5.0% | 12 Jun, 2026 |
| 11 | Amanda Julian | Director | 11,316 | 0 | 11,316 | 3.3% | 12 Jun, 2026 |
| 12 | Megan A. Kendrick | Sr. Vp Of Human Resources | 10,578 | 0 | 10,578 | 3.1% | 02 Apr, 2026 |
| 13 | Irma Lockridge | Director | 8,688 | 0 | 8,688 | 2.5% | 12 Jun, 2026 |
| 14 | Jesus Tanguis | Svp/Gm Precast Infrastructure | 2,986 | 0 | 2,986 | 0.9% | 02 Apr, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 26 Aug, 2026 | Michael Wray | Executive Vice President | Disposed S | 4,500 | $110.94 | $499.24K | 23,886 | Direct |
| 27 Aug, 2026 | Michael Wray | Executive Vice President | Disposed G | 600 | $0.00 | $0 | 23,286 | Direct |
| 24 Aug, 2026 | Keith R Larson | Director | Disposed S | 1,250 | $110.32 | $137.89K | 19,883 | Direct |
| 24 Aug, 2026 | Scott J Montross | President Ceo | Disposed S | 2,500 | $109.37 | $273.42K | 71,129 | Direct |
| 17 Aug, 2026 | Scott J Montross | President Ceo | Disposed S | 2,500 | $115.13 | $287.82K | 73,629 | Direct |
| 17 Aug, 2026 | Keith R Larson | Director | Disposed S | 1,250 | $115.86 | $144.83K | 21,133 | Direct |
| 10 Aug, 2026 | Aaron Wilkins | Cfo | Disposed S | 428 | $120.00 | $51.36K | 25,898 | Direct |
| 10 Aug, 2026 | Scott J Montross | President Ceo | Disposed S | 2,500 | $118.74 | $296.85K | 76,129 | Direct |
| 04 Aug, 2026 | Scott J Montross | President Ceo | Disposed S | 2,500 | $128.62 | $321.55K | 78,629 | Direct |
| 10 Jun, 2026 | Irma Lockridge | Director | Acquired A | 899 | $122.31 | $109.96K | 8,688 | Direct |
| 10 Jun, 2026 | John Paschal | Director | Acquired A | 899 | $122.31 | $109.96K | 17,098 | Direct |
| 10 Jun, 2026 | Michael C Franson | Director | Acquired A | 899 | $122.31 | $109.96K | 19,424 | Direct |
| 10 Jun, 2026 | John Paschal | Director | Acquired A | 899 | $122.31 | $109.96K | 17,098 | Direct |
| 10 Jun, 2026 | Amanda Julian | Director | Acquired A | 899 | $122.31 | $109.96K | 11,316 | Direct |
| 10 Jun, 2026 | Richard A Roman | Director | Acquired A | 899 | $122.31 | $109.96K | 34,340 | Direct |
| 10 Jun, 2026 | Keith R Larson | Director | Acquired A | 899 | $122.31 | $109.96K | 22,383 | Direct |
| 31 Mar, 2026 | Jesus Tanguis | Svp/Gm Precast Infrastructure | Acquired M | 1,242 | — | — | 2,738 | Direct |
| 31 Mar, 2026 | Jesus Tanguis | Svp/Gm Precast Infrastructure | Acquired M | 1,242 | — | — | 2,738 | Direct |
| 31 Mar, 2026 | Eric Stokes | Svp And Group President Of Wts | Acquired M | 3,373 | — | — | 35,572 | Direct |
| 31 Mar, 2026 | Eric Stokes | Svp And Group President Of Wts | Acquired M | 3,373 | — | — | 35,572 | Direct |