List of insiders holdings for TETRA TECH INC:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | HWANG LI-SAN Director | 2005-12-13 17:00:01 | 1,098,983 0 | 1,098,983 | Form 4 |
| 2 | BATRACK DAN L Chairman and CEO | 2025-12-02 20:07:02 | 534,003 0 | 534,003 | Form 4 |
| 3 | WHALEN DANIEL A Retired Director | 2006-11-01 09:37:26 | 24,000 374,992 | 398,992 | Form 5 |
| 4 | SHOEMAKER LESLIE L EVP, Chief Sustainability | 2025-12-02 20:22:10 | 362,578 0 | 362,578 | Form 4 |
| 5 | BURDICK STEVEN M EVP, CFO | 2025-12-02 20:11:57 | 187,191 0 | 187,191 | Form 4 |
| 6 | KING DAVID W Former CFO | 2011-06-29 17:50:35 | 157,580 0 | 157,580 | Form 4 |
| 7 | Ritrievi Kimberly E Director | 2026-01-14 16:26:23 | 145,408 0 | 145,408 | Form 4 |
| 8 | Hopson Preston EVP, Chief Legal/Human Capital | 2025-12-02 20:18:15 | 109,994 0 | 109,994 | Form 4 |
| 9 | Maguire Joanne M Director | 2024-10-02 16:55:49 | 97,785 0 | 97,785 | Form 4 |
| 10 | BROWNLIE WILLIAM R SVP, Chief Engineer | 2022-11-07 17:37:08 | 85,419 0 | 85,419 | Form 5 |
| 11 | Volpi Kirsten M Director | 2025-12-02 20:23:29 | 80,182 0 | 80,182 | Form 4 |
| 12 | Argus Roger R President | 2025-12-02 20:08:20 | 72,354 0 | 72,354 | Form 4 |
| 13 | CARTER BRIAN N SVP, Corporate Controller | 2025-12-02 20:13:01 | 70,063 0 | 70,063 | Form 4 |
| 14 | PAGENKOPF JAMES R EXECUTIVE VICE PRESIDENT | 2015-10-13 19:55:33 | 64,543 0 | 64,543 | Form 4 |
| 15 | LEWIS J CHRISTOPHER Director | 2022-12-16 18:14:22 | 57,875 0 | 57,875 | Form 4 |
| 16 | Birkenbeuel Gary Director | 2026-01-14 16:26:42 | 51,032 0 | 51,032 | Form 4 |
| 17 | GROSS FRANK C JR FORMER EVP | 2015-06-23 18:26:54 | 48,407 0 | 48,407 | Form 4 |
| 18 | SMITH ALBERT E Director | 2020-02-26 18:08:24 | 47,570 0 | 47,570 | Form 4 |
| 19 | SHELTON JAMES J Director | 2004-03-02 13:15:18 | 38,880 0 | 38,880 | Form 4 |
| 20 | CHU RONALD J EXECUTIVE VICE PRESIDENT | 2017-11-13 19:11:12 | 37,104 0 | 37,104 | Form 4 |
| 21 | CHRISTENSEN CRAIG L SVP, CIO | 2022-11-07 16:51:45 | 36,428 0 | 36,428 | Form 5 |
| 22 | LEMMON RICHARD A SVP, Corporate Administration | 2022-11-07 17:31:25 | 35,818 0 | 35,818 | Form 5 |
| 23 | SAY ARKAN Vice President | 2003-08-27 19:26:43 | 33,000 0 | 33,000 | Form 4 |
| 24 | BOX SAM W VICE PRESIDENT | 2009-01-02 18:22:39 | 32,491 0 | 32,491 | Form 4 |
| 25 | ROGERS DONALD I JR EXECUTVIE VICE PRESIDENT | 2011-01-13 12:34:23 | 25,102 0 | 25,102 | Form 4 |
| 26 | GRANT HUGH M Director | 2020-02-26 18:08:03 | 24,913 0 | 24,913 | Form 4 |
| 27 | MCDONALD KEVIN P Former SVP, Human Resources | 2018-11-19 21:05:13 | 22,038 0 | 22,038 | Form 4 |
| 28 | Gandhi Prashant Director | 2025-12-02 20:15:32 | 18,517 0 | 18,517 | Form 4 |
| 29 | FAUST CHARLES R VICE PRESIDENT | 2004-08-16 12:26:18 | 17,628 0 | 17,628 | Form 4 |
| 30 | BIEBER MICHAEL A SENIOR VICE PRESIDENT | 2015-02-27 13:27:50 | 16,149 0 | 16,149 | Form 4 |
| 31 | TRULY RICHARD H Director | 2017-04-12 18:47:15 | 13,220 0 | 13,220 | Form 4 |
| 32 | Teufele Bernard SVP, Canada and South America | 2022-11-07 16:55:30 | 12,901 0 | 12,901 | Form 5 |
| 33 | Amidon Derek G SVP, Comm./Int'l Svcs. Group | 2023-11-15 16:43:33 | 11,179 0 | 11,179 | Form 5 |
| 34 | Obiaya Christiana Director | 2025-12-02 20:20:17 | 11,135 0 | 11,135 | Form 4 |
| 35 | THOMPSON J KENNETH Director | 2024-02-16 18:10:06 | 10,985 0 | 10,985 | Form 4 |
| 36 | HAUN PATRICK D SENIOR VICE PRESIDENT | 2009-01-02 18:38:14 | 7,098 1,668 | 8,766 | Form 4 |
| 37 | SMITH DOUGLAS G EXECUTIVE VICE PRESIDENT | 2013-01-08 14:17:28 | 7,942 0 | 7,942 | Form 4 |
| 38 | Auman Jan K SVP, Global Development Svcs. | 2019-11-22 16:33:02 | 6,926 0 | 6,926 | Form 4 |
| 39 | WALSH MARK A SENIOR VICE PRESIDENT | 2008-01-03 20:04:03 | 6,762 0 | 6,762 | Form 4 |
| 40 | Rynning Mark A SVP, R&S Infrastructure | 2021-11-22 19:43:43 | 3,862 0 | 3,862 | Form 4 |
| 41 | Hudkins Jill President | 2024-04-30 17:32:09 | 3,578 0 | 3,578 | Form 4 |
| 42 | HADEN PATRICK C Director | 2022-03-21 17:16:53 | 3,062 0 | 3,062 | Form 4 |
| 43 | MCINTIRE LEE A Director | 2005-11-15 19:30:01 | 2,500 0 | 2,500 | Form 3 |
| 44 | JASKA JAMES M PRESIDENT | 2004-06-02 18:00:10 | 2,073 0 | 2,073 | Form 4 |
| 45 | O'Rourke Brendan M. SVP, Enterprise Risk Mgmt. | 2022-11-18 20:31:54 | 1,014 0 | 1,014 | Form 4 |
| 46 | HANEY JAMES T EXECUTIVE VICE PRESIDENT | 2004-06-02 18:08:16 | 624 0 | 624 | Form 4 |
| 47 | Douglas John M. Director | 2025-03-03 20:51:13 | 610 0 | 610 | Form 4 |
| 48 | Hardwick M Susan Director | 2026-01-06 17:46:04 | 0 0 | 0 | Form 3 |
| 49 | Feeler Jeffrey R Director | 2026-01-08 17:07:28 | 0 0 | 0 | Form 3 |
| 50 | SALIN JANIS B SVP, GENERAL COUNSEL | 2018-01-23 18:47:40 | 0 0 | 0 | Form 4 |