| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2020-02-05 | BlackRock Inc. | Primoris Services Corp | 3,098,758 | 6.1% | EDGAR |
| SC 13D/A | 2019-12-16 | Pratt Brian | Primoris Services Corp | 2,779,162 | 5.7% | EDGAR |
| SC 13G/A | 2019-02-12 | VANGUARD GROUP INC | Primoris Services Corp | 3,818,245 | 7.4% | EDGAR |
| SC 13G | 2019-02-11 | Van Berkom & Associates Inc. | Primoris Services Corp | 2,696,283 | 5.3% | EDGAR |
| SC 13G | 2019-02-08 | BlackRock Inc. | Primoris Services Corp | 2,839,156 | 5.5% | EDGAR |
| SC 13D/A | 2018-06-07 | Primoris Services Corp | Willbros Group, Inc.\NEW\ | 100 | 100.0% | EDGAR |
| SC 13G | 2018-05-04 | Van Berkom & Associates Inc. | Primoris Services Corp | 2,713,980 | 5.3% | EDGAR |
| SC 13D | 2018-04-06 | Primoris Services Corp | Willbros Group, Inc.\NEW\ | 11,060,280 | 17.5% | EDGAR |
| SC 13G/A | 2018-02-12 | VANGUARD GROUP INC | Primoris Services Corp | 3,627,375 | 7.0% | EDGAR |
| SC 13G | 2018-02-09 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | Primoris Services Corp | 10 | 12.0% | EDGAR |
| SC 13G/A | 2018-02-08 | WELLINGTON MANAGEMENT GROUP LLP | Primoris Services Corp | 2,003,082 | 3.9% | EDGAR |
| SC 13G/A | 2017-02-13 | VANGUARD GROUP INC | Primoris Services Corp | 3,097,120 | 6.0% | EDGAR |
| SC 13G | 2017-02-09 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | Primoris Services Corp | 3,071,246 | 5.9% | EDGAR |
| SC 13G | 2017-02-09 | WELLINGTON MANAGEMENT GROUP LLP | Primoris Services Corp | 2,644,813 | 5.1% | EDGAR |
| SC 13G | 2016-02-10 | VANGUARD GROUP INC | Primoris Services Corp | 2,701,779 | 5.2% | EDGAR |
| SC 13G | 2016-02-02 | BARROW HANLEY MEWHINNEY & STRAUSS LLC | Primoris Services Corp | 3,332,154 | 6.4% | EDGAR |
| SC 13G/A | 2013-05-13 | WELLS FARGO & COMPANY/MN | Primoris Services Corp | 2,478,128 | 4.8% | EDGAR |
| SC 13G/A | 2013-03-29 | WELLS FARGO & COMPANY/MN | Primoris Services Corp | 3,232,898 | 6.3% | EDGAR |
| SC 13G/A | 2013-02-13 | WELLS FARGO & COMPANY/MN | Primoris Services Corp | 3,181,266 | 6.3% | EDGAR |
| SC 13G/A | 2012-02-10 | WELLS FARGO & CO/MN | Primoris Services Corp | 2,443,592 | 4.8% | EDGAR |