| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2021-02-11 | RENAISSANCE TECHNOLOGIES LLC | PATTERSON UTI ENERGY INC | 8,493,259 | 4.5% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | PATTERSON UTI ENERGY INC | 20,217,911 | 10.8% | EDGAR |
| SC 13G/A | 2021-01-25 | BlackRock Inc. | PATTERSON UTI ENERGY INC | 29,143,312 | 15.5% | EDGAR |
| SC 13G/A | 2020-08-07 | BlackRock Inc. | PATTERSON UTI ENERGY INC | 28,866,952 | 15.4% | EDGAR |
| SC 13G/A | 2020-06-10 | VANGUARD GROUP INC | PATTERSON UTI ENERGY INC | 19,752,349 | 10.6% | EDGAR |
| SC 13G/A | 2020-05-07 | JPMORGAN CHASE & CO | PATTERSON UTI ENERGY INC | 527,718 | 0.2% | EDGAR |
| SC 13G | 2020-02-14 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | PATTERSON UTI ENERGY INC | 10,543,437 | 5.4% | EDGAR |
| SC 13G/A | 2020-02-12 | VANGUARD GROUP INC | PATTERSON UTI ENERGY INC | 17,167,085 | 8.8% | EDGAR |
| SC 13G | 2020-02-12 | RENAISSANCE TECHNOLOGIES LLC | PATTERSON UTI ENERGY INC | 11,464,159 | 5.9% | EDGAR |
| SC 13G | 2020-02-12 | DIMENSIONAL FUND ADVISORS LP | PATTERSON UTI ENERGY INC | 13,711,625 | 7.0% | EDGAR |
| SC 13G/A | 2020-02-04 | BlackRock Inc. | PATTERSON UTI ENERGY INC | 19,704,929 | 10.1% | EDGAR |
| SC 13G | 2020-01-27 | JPMORGAN CHASE & CO | PATTERSON UTI ENERGY INC | 10,224,045 | 5.2% | EDGAR |
| SC 13G/A | 2019-08-09 | BlackRock Inc. | PATTERSON UTI ENERGY INC | 20,306,609 | 10.0% | EDGAR |
| SC 13G/A | 2019-02-12 | VANGUARD GROUP INC | PATTERSON UTI ENERGY INC | 19,354,997 | 8.9% | EDGAR |
| SC 13G/A | 2019-02-06 | BlackRock Inc. | PATTERSON UTI ENERGY INC | 20,781,163 | 9.6% | EDGAR |
| SC 13G/A | 2018-02-09 | VANGUARD GROUP INC | PATTERSON UTI ENERGY INC | 18,639,477 | 8.4% | EDGAR |
| SC 13G/A | 2018-02-09 | DIMENSIONAL FUND ADVISORS LP | PATTERSON UTI ENERGY INC | 8,575,733 | 3.9% | EDGAR |
| SC 13G/A | 2018-02-08 | WELLINGTON MANAGEMENT GROUP LLP | PATTERSON UTI ENERGY INC | 6,144,061 | 2.8% | EDGAR |
| SC 13G/A | 2018-01-29 | BlackRock Inc. | PATTERSON UTI ENERGY INC | 20,590,666 | 9.3% | EDGAR |
| SC 13G/A | 2017-02-10 | VANGUARD GROUP INC | PATTERSON UTI ENERGY INC | 11,926,415 | 8.0% | EDGAR |