| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2021-02-10 | Invesco Ltd. | Willdan Group, Inc. | 1,381,850 | 11.4% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | Willdan Group, Inc. | 594,398 | 4.9% | EDGAR |
| SC 13G | 2021-02-10 | Invesco Ltd. | Willdan Group, Inc. | 1,139,010 | 9.4% | EDGAR |
| SC 13G/A | 2021-02-01 | BlackRock Inc. | Willdan Group, Inc. | 764,648 | 6.3% | EDGAR |
| SC 13G/A | 2020-02-14 | TimesSquare Capital Management, LLC | Willdan Group, Inc. | 612,685 | 5.4% | EDGAR |
| SC 13G | 2020-02-14 | Forager Capital Management, LLC | Willdan Group, Inc. | 601,082 | 5.3% | EDGAR |
| SC 13G | 2020-02-11 | VANGUARD GROUP INC | Willdan Group, Inc. | 585,998 | 5.2% | EDGAR |
| SC 13G | 2020-02-11 | RICE HALL JAMES & ASSOCIATES, LLC | Willdan Group, Inc. | 670,145 | 5.9% | EDGAR |
| SC 13G | 2020-02-10 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | Willdan Group, Inc. | 626,154 | 5.5% | EDGAR |
| SC 13G/A | 2020-02-06 | BlackRock Inc. | Willdan Group, Inc. | 724,503 | 6.4% | EDGAR |
| SC 13G | 2019-02-14 | TimesSquare Capital Management, LLC | Willdan Group, Inc. | 607,765 | 5.6% | EDGAR |
| SC 13G | 2019-02-08 | BlackRock Inc. | Willdan Group, Inc. | 687,836 | 6.3% | EDGAR |
| SC 13G/A | 2018-11-09 | BlackRock Inc. | Willdan Group, Inc. | 540,596 | 4.9% | EDGAR |
| SC 13G/A | 2018-02-14 | RENAISSANCE TECHNOLOGIES LLC | Willdan Group, Inc. | 259,300 | 3.0% | EDGAR |
| SC 13G | 2018-02-01 | BlackRock Inc. | Willdan Group, Inc. | 478,747 | 5.5% | EDGAR |
| SC 13G/A | 2017-02-14 | Red Oak Partners, LLC | Willdan Group, Inc. | 10,292 | 0.1% | EDGAR |
| SC 13G | 2017-02-14 | RENAISSANCE TECHNOLOGIES LLC | Willdan Group, Inc. | 506,989 | 6.1% | EDGAR |
| SC 13G/A | 2016-03-01 | WEDBUSH, Inc. | Willdan Group, Inc. | 17,500 | 0.2% | EDGAR |
| SC 13G/A | 2016-02-16 | Red Oak Partners, LLC | Willdan Group, Inc. | 484,986 | 6.2% | EDGAR |
| SC 13G | 2015-11-30 | Red Oak Partners, LLC | Willdan Group, Inc. | 416,551 | 5.3% | EDGAR |