Willdan's three largest insider shareholders as of September 12, 2026 are Fund, L.P. Forager (TenPercentOwner, 1.26Mn shares), Michael A Bieber (President And Ceo, 249.53K shares), Thomas Donald Brisbin (Chief Executive Officer, 96.69K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Fund, L.P. Forager | TenPercentOwner | 1,255,765 | 0 | 1,255,765 | 64.5% | 11 Jul, 2024 |
| 2 | Michael A Bieber | President And Ceo | 249,525 | 0 | 249,525 | 12.8% | 15 May, 2026 |
| 3 | Thomas Donald Brisbin | Chief Executive Officer | 96,687 | 0 | 96,687 | 5.0% | 09 Sep, 2026 |
| 4 | Creighton K Early | Executive Vp And Cfo | 78,664 | 0 | 78,664 | 4.0% | 26 Mar, 2026 |
| 5 | Keith Renken | Director | 61,320 | 0 | 61,320 | 3.1% | 09 Jun, 2023 |
| 6 | Keith W Renken | Director | 57,735 | 0 | 57,735 | 3.0% | 10 Jun, 2022 |
| 7 | Micah Chen | Executive Vp General Counsel | 50,050 | 0 | 50,050 | 2.6% | 26 Mar, 2026 |
| 8 | Paul Milton Whitelaw | Svp, Business Development | 25,533 | 0 | 25,533 | 1.3% | 30 Mar, 2022 |
| 9 | Steven A Cohen | Director | 22,090 | 0 | 22,090 | 1.1% | 18 Jun, 2026 |
| 10 | Mohammad Shahidehpour | Director | 15,789 | 0 | 15,789 | 0.8% | 18 Jun, 2026 |
| 11 | Dennis V Mcginn | Director | 12,571 | 0 | 12,571 | 0.6% | 18 Jun, 2026 |
| 12 | Wanda Kay Reder | Director | 11,917 | 0 | 11,917 | 0.6% | 18 Jun, 2026 |
| 13 | Cynthia Downes | Director | 10,150 | 0 | 10,150 | 0.5% | 18 Jun, 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 |
|---|---|---|---|---|---|---|---|---|
| 08 Sep, 2026 | Thomas Donald Brisbin | Director | Acquired M | 3,439 | $16.27 | $55.95K | 100,126 | Direct |
| 08 Sep, 2026 | Thomas Donald Brisbin | Director | Disposed S | 3,439 | $88.19 | $303.29K | 96,687 | Direct |
| 08 Sep, 2026 | Thomas Donald Brisbin | Director | Disposed M | 3,439 | $0.00 | $0 | 27,540 | Direct |
| 03 Sep, 2026 | Thomas Donald Brisbin | Director | Acquired M | 58,757 | $16.27 | $955.98K | 155,444 | Direct |
| 03 Sep, 2026 | Thomas Donald Brisbin | Director | Disposed S | 58,757 | $88.14 | $5.18Mn | 96,687 | Direct |
| 03 Sep, 2026 | Thomas Donald Brisbin | Director | Disposed M | 58,727 | $0.00 | $0 | 30,979 | Direct |
| 17 Jun, 2026 | Steven A Cohen | Director | Acquired A | 1,241 | $0.00 | $0 | 22,090 | Direct |
| 17 Jun, 2026 | Wanda Kay Reder | Director | Acquired A | 1,241 | $0.00 | $0 | 11,917 | Direct |
| 17 Jun, 2026 | Cynthia Downes | Director | Acquired A | 1,241 | $0.00 | $0 | 10,150 | Direct |
| 17 Jun, 2026 | Thomas Donald Brisbin | Director | Acquired A | 1,241 | $0.00 | $0 | 96,687 | Direct |
| 17 Jun, 2026 | Mohammad Shahidehpour | Director | Acquired A | 1,241 | $0.00 | $0 | 15,789 | Direct |
| 17 Jun, 2026 | Dennis V Mcginn | Director | Acquired A | 1,241 | $0.00 | $0 | 12,571 | Direct |
| 14 May, 2026 | Michael A Bieber | President And Ceo | Acquired M | 40,009 | $16.27 | $650.95K | 289,534 | Direct |
| 14 May, 2026 | Michael A Bieber | President And Ceo | Acquired M | 16,667 | $28.19 | $469.84K | 306,201 | Direct |
| 14 May, 2026 | Michael A Bieber | President And Ceo | Disposed S | 25,429 | $90.88 | $2.31Mn | 280,772 | Direct |
| 14 May, 2026 | Michael A Bieber | President And Ceo | Disposed S | 23,015 | $91.95 | $2.12Mn | 257,757 | Direct |
| 14 May, 2026 | Michael A Bieber | President And Ceo | Disposed S | 7,956 | $92.65 | $737.12K | 249,801 | Direct |
| 14 May, 2026 | Michael A Bieber | President And Ceo | Disposed S | 276 | $93.74 | $25.87K | 249,525 | Direct |
| 14 May, 2026 | Michael A Bieber | President And Ceo | Disposed M | 40,009 | $0.00 | $0 | 0 | Direct |
| 14 May, 2026 | Michael A Bieber | President And Ceo | Disposed M | 16,667 | $0.00 | $0 | 0 | Direct |