Willdan Group, Inc. engages in the provision of technical and consulting services. It operates through the Energy and Engineering & Consulting segments. The Energy segment offers energy and sustainability consulting services to utilities, public agencies, and private industries. The Engineering and Consulting segment manages civil engineering-related construction management, building and safety, city engineering office management, city planning, civil design, geotechnical, material testing and other engineering consulting services. The company was founded by Dan W. Heil and William Stookey in May 1964 and is headquartered in Anaheim, CA. |  |
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 | CEOMr. Michael A. Bieber Executive VP & CFOMr. Creighton K. Early Executive VP & General CounselMr. Micah H. Chen J.D. Vice President of Investor RelationsMr. Albert Leo Kaschalk CPA SecretaryMs. Kate M. Nguyen |
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| Insider Trading |
Relationship |
Date |
Transaction |
Cost |
#Shares |
Value ($) |
#Shares Total |
SEC Form 4 |
| BIEBER MICHAEL A | PRESIDENT AND CEO | May 14 '26 | Option Exercise | 19.78 | 56,676 | 1,120,789 | 306,201 | May 15 06:08 PM | | BIEBER MICHAEL A | PRESIDENT AND CEO | May 14 '26 | Sale | 91.58 | 56,676 | 5,190,212 | 249,525 | May 15 06:08 PM | | BIEBER MICHAEL A | PRESIDENT AND CEO | May 13 '26 | Option Exercise | 16.27 | 9,991 | 162,554 | 259,516 | May 14 05:56 PM | | BIEBER MICHAEL A | PRESIDENT AND CEO | May 13 '26 | Sale | 92.65 | 9,991 | 925,666 | 249,525 | May 14 05:56 PM | | MICHAEL BIEBER | Officer | May 14 '26 | Proposed Sale | 91.58 | 56,676 | 5,190,150 | | May 14 05:01 PM | | MICHAEL BIEBER | Officer | May 13 '26 | Proposed Sale | 92.65 | 9,991 | 925,690 | | May 13 05:33 PM | | Cohen Steven A | Director | Mar 06 '26 | Sale | 81.82 | 6,000 | 490,920 | 20,849 | Mar 10 05:19 PM | | STEVEN A COHEN | Director | Mar 06 '26 | Proposed Sale | 81.82 | 6,000 | 490,908 | | Mar 06 04:16 PM | | CHEN MICAH | EXECUTIVE VP & GENERAL COUNSEL | Sep 18 '25 | Option Exercise | 32.79 | 10,000 | 327,900 | 50,423 | Sep 22 05:44 PM | | CHEN MICAH | EXECUTIVE VP & GENERAL COUNSEL | Sep 18 '25 | Sale | 106.00 | 10,000 | 1,060,000 | 40,423 | Sep 22 05:44 PM | | McGinn Dennis V | Director | Sep 18 '25 | Sale | 106.32 | 7,298 | 775,923 | 11,330 | Sep 22 05:42 PM | | DENNIS MCGINN | Director | Sep 18 '25 | Proposed Sale | 106.32 | 7,298 | 775,910 | | Sep 18 05:28 PM | | MICAH CHEN | Officer | Sep 18 '25 | Proposed Sale | 106.00 | 10,000 | 1,060,000 | | Sep 18 04:14 PM | | Brisbin Thomas Donald | Director | Aug 25 '25 | Option Exercise | 16.27 | 5,182 | 84,311 | 75,878 | Aug 26 05:45 PM | | Brisbin Thomas Donald | Director | Aug 25 '25 | Sale | 118.15 | 5,182 | 612,253 | 70,696 | Aug 26 05:45 PM | | Brisbin Thomas Donald | Director | Aug 22 '25 | Sale | 108.72 | 117,595 | 12,784,497 | 70,696 | Aug 26 05:39 PM | | THOMAS BRISBIN | Director | Aug 25 '25 | Proposed Sale | 118.15 | 5,182 | 612,256 | | Aug 25 07:28 PM | | Brisbin Thomas Donald | Director | Aug 21 '25 | Sale | 104.42 | 125,000 | 13,052,879 | 188,291 | Aug 25 05:38 PM | | Brisbin Thomas Donald | Director | Aug 20 '25 | Sale | 104.19 | 7,405 | 771,527 | 313,291 | Aug 21 05:30 PM | | Brisbin Thomas Donald | Director | Aug 18 '25 | Option Exercise | 16.27 | 5,082 | 82,684 | 450,778 | Aug 20 05:39 PM | | Brisbin Thomas Donald | Director | Aug 18 '25 | Sale | 109.69 | 130,082 | 14,268,935 | 320,696 | Aug 20 05:39 PM | | Downes Cynthia | Director | Aug 15 '25 | Sale | 109.43 | 2,763 | 302,355 | 8,909 | Aug 18 05:42 PM | | REDER WANDA KAY | Director | Aug 14 '25 | Sale | 119.46 | 850 | 101,541 | 10,676 | Aug 18 05:40 PM | | THOMAS BRISBIN | Director | Aug 18 '25 | Proposed Sale | 112.34 | 5,082 | 570,905 | | Aug 18 05:13 PM | | EARLY CREIGHTON K | EXECUTIVE VP AND CFO | Aug 13 '25 | Option Exercise | 9.08 | 7,764 | 70,497 | 79,835 | Aug 15 05:31 PM | | EARLY CREIGHTON K | EXECUTIVE VP AND CFO | Aug 13 '25 | Sale | 116.54 | 7,764 | 904,817 | 72,071 | Aug 15 05:31 PM | | CYNTHIA DOWNES | Director | Aug 15 '25 | Proposed Sale | 109.43 | 2,763 | 302,358 | | Aug 15 04:25 PM | | WANDA REDER | Director | Aug 14 '25 | Proposed Sale | 119.46 | 850 | 101,541 | | Aug 14 05:46 PM | | Cohen Steven A | Director | Aug 12 '25 | Sale | 116.34 | 2,500 | 290,850 | 26,849 | Aug 14 05:30 PM | | CREIGHTON K EARLY | Officer | Aug 13 '25 | Proposed Sale | 116.54 | 7,764 | 904,819 | | Aug 13 04:02 PM | | STEVEN A COHEN | Director | Aug 12 '25 | Proposed Sale | 116.34 | 2,500 | 290,856 | | Aug 12 04:08 PM |
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