Tetra Tech Inc
TTEK- Exchange
- Nasdaq
- Industry
- Services-Engineering Services
- SEC CIK
- 0000831641
No open-market purchases or sales by Tetra Tech Inc insiders were filed in the last 90 days; 555 institutions reported holding it in 13F filings for Q2 2026, worth $7.32B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Tetra Tech Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 593
- −10 vs. Q4 2025
- Shares held
- 243.5M
- +31.1M (+14.7%) vs. Q4 2025
- Total value
- $7.35B
- +$227.0M (+3.2%) vs. Q4 2025
- New holders
- 74
- 201 more added
- Sold out
- 84
- 230 more reduced
8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TTEK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 555 | $7.32B |
| Q1 2026 | 593 | $7.35B |
| Q4 2025 | 611 | $8.10B |
| Q3 2025 | 597 | $8.22B |
| Q2 2025 | 590 | $8.94B |
| Q1 2025 | 568 | $7.18B |
| Q4 2024 | 638 | $9.45B |
| Q3 2024 | 646 | $11.2B |
| Q2 2024 | 600 | $9.88B |
| Q1 2024 | 512 | $8.66B |
| Q4 2023 | 510 | $7.87B |
| Q3 2023 | 471 | $7.09B |
| Q2 2023 | 455 | $7.67B |
| Q1 2023 | 445 | $6.81B |
| Q4 2022 | 470 | $6.68B |
| Q3 2022 | 412 | $5.91B |
| Q2 2022 | 415 | $6.31B |
| Q1 2022 | 404 | $7.86B |
| Q4 2021 | 401 | $7.93B |
| Q3 2021 | 359 | $7.08B |
| Q2 2021 | 366 | $5.68B |
| Q1 2021 | 365 | $6.39B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Tetra Tech Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Icon Advisers Inc | 0 | $0 | 0.00% | −90,000−100.0% | Sold out |
| Alberta Investment Management Corp | 0 | $0 | 0.00% | −42,000−100.0% | Sold out |
| Lecap Asset Management Ltd | 0 | $0 | 0.00% | −34,678−100.0% | Sold out |
| Worldquant Millennium Advisors LLC | 0 | $0 | 0.00% | −33,708−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −33,382−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −30,856−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −27,975−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −24,613−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −21,963−100.0% | Sold out |
| Ethic Inc. | 0 | $0 | 0.00% | −21,794−100.0% | Sold out |
| Havemeyer Place LP | 0 | $0 | 0.00% | −21,489−100.0% | Sold out |
| Trium Capital LLP | 0 | $0 | 0.00% | −20,810−100.0% | Sold out |
| Massar Capital Management, LP | 0 | $0 | 0.00% | −20,218−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −19,652−100.0% | Sold out |
| WBI Investments | 0 | $0 | 0.00% | −16,156−100.0% | Sold out |
| VestGen Advisors, LLC | 0 | $0 | 0.00% | −15,879−100.0% | Sold out |
| Harbor Capital Advisors, Inc. | 0 | $0 | 0.00% | −13,632−100.0% | Sold out |
| Buckingham Strategic Partners | 0 | $0 | 0.00% | −13,575−100.0% | Sold out |
| Cynosure Management, LLC | 0 | $0 | 0.00% | −13,419−100.0% | Sold out |
| Holocene Advisors, LP | 0 | $0 | 0.00% | −12,317−100.0% | Sold out |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −12,078−100.0% | Sold out |
| Aureus Asset Management, LLC | 0 | $0 | 0.00% | −12,065−100.0% | Sold out |
| Snowden Capital Advisors LLC | 0 | $0 | 0.00% | −11,891−100.0% | Sold out |
| Pallas Capital Advisors LLC | 0 | $0 | 0.00% | −10,518−100.0% | Sold out |
| Whalen Wealth Management Inc. | 0 | $0 | 0.00% | −9,985−100.0% | Sold out |
| HighPoint Advisor Group LLC | 0 | $0 | 0.00% | −9,384−100.0% | Sold out |
| Commerce Bank | 0 | $0 | 0.00% | −9,191−100.0% | Sold out |
| Bayforest Capital Ltd | 0 | $0 | 0.00% | −8,973−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −8,535−100.0% | Sold out |
| Resources Investment Advisors, LLC. | 0 | $0 | 0.00% | −8,370−100.0% | Sold out |
| Brown Advisory Inc | 0 | $0 | 0.00% | −7,837−100.0% | Sold out |
| Personal Cfo Solutions, LLC | 0 | $0 | 0.00% | −7,746−100.0% | Sold out |
| Stevens Capital Management LP | 0 | $0 | 0.00% | −7,207−100.0% | Sold out |
| NorthCrest Asset Manangement, LLC | 0 | $0 | 0.00% | −6,675−100.0% | Sold out |
| Interchange Capital Partners, LLC | 0 | $0 | 0.00% | −6,932−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −6,610−100.0% | Sold out |
| Phoenix Holdings Ltd. | 0 | $0 | 0.00% | −6,573−100.0% | Sold out |
| J. Safra Sarasin Holding AG | 0 | $0 | 0.00% | −6,500−100.0% | Sold out |
| Atomi Financial Group, Inc. | 0 | $0 | 0.00% | −6,481−100.0% | Sold out |
| Claret Asset Management Corp | 0 | $0 | 0.00% | −6,420−100.0% | Sold out |
| Fulton Bank, N.A. | 0 | $0 | 0.00% | −6,408−100.0% | Sold out |
| Panagora Asset Management Inc | 0 | $0 | 0.00% | −6,350−100.0% | Sold out |
| Krilogy Financial LLC | 0 | $0 | 0.00% | −5,798−100.0% | Sold out |
| Waldron Private Wealth LLC | 0 | $0 | 0.00% | −6,220−100.0% | Sold out |
| Beese Fulmer Investment Management, Inc. | 0 | $0 | 0.00% | −6,200−100.0% | Sold out |
| Forum Financial Management, LP | 0 | $0 | 0.00% | −6,191−100.0% | Sold out |
| Sivia Capital Partners, LLC | 0 | $0 | 0.00% | −6,018−100.0% | Sold out |
| Meiji Yasuda Asset Management Co Ltd. | 0 | $0 | 0.00% | −5,999−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −4,382−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −2,337−100.0% | Sold out |
| Toronto Dominion Bank | 0 | $0 | 0.00% | −2,063−100.0% | Sold out |
| Wellington Grp LLC | 0 | $0 | 0.00% | −1,950−100.0% | Sold out |
| Wexford Capital LP | 0 | $0 | 0.00% | −714−100.0% | Sold out |
| Canton Hathaway, LLC | 0 | $0 | 0.00% | −645−100.0% | Sold out |
| SageView Advisory Group, LLC | 0 | $0 | 0.00% | −510−100.0% | Sold out |
| Centerpoint Advisors, LLC | 0 | $0 | 0.00% | −504−100.0% | Sold out |
| Bank of Jackson Hole Trust | 0 | $0 | 0.00% | −463−100.0% | Sold out |
| Private Trust Co NA | 0 | $0 | 0.00% | −455−100.0% | Sold out |
| Elyxium Wealth, LLC | 0 | $0 | 0.00% | −433−100.0% | Sold out |
| Banque Cantonale Vaudoise | 0 | $0 | 0.00% | −348−100.0% | Sold out |
| TCTC Holdings, LLC | 0 | $0 | 0.00% | −340−100.0% | Sold out |
| T. Rowe Price Investment Management, Inc. | 0 | $0 | 0.00% | −312−100.0% | Sold out |
| Kohmann Bosshard Financial Services, LLC | 0 | $0 | 0.00% | −251−100.0% | Sold out |
| Salomon & Ludwin, LLC | 0 | $0 | 0.00% | −108−100.0% | Sold out |
| Crewe Advisors LLC | 0 | $0 | 0.00% | −108−100.0% | Sold out |
| SHP Wealth Management | 0 | $0 | 0.00% | −86−100.0% | Sold out |
| Hager Investment Management Services, LLC | 0 | $0 | 0.00% | −65−100.0% | Sold out |
| Dogwood Wealth Management LLC | 0 | $0 | 0.00% | −65−100.0% | Sold out |
| Marquette Asset Management, LLC | 0 | $0 | 0.00% | −55−100.0% | Sold out |
| Investors Portfolio Services LLC | 0 | $0 | 0.00% | −18−100.0% | Sold out |
| UMA Financial Services, Inc. | 0 | $0 | 0.00% | −16−100.0% | Sold out |
| Rakuten Securities, Inc. | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| DV Trading LLC | 0 | $0 | 0.00% | −9−100.0% | Sold out |
| United Financial Planning Group LLC | 0 | $0 | 0.00% | −7−100.0% | Sold out |
| American Capital Advisory, LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| MV Capital Management, Inc. | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |
| Terra Alpha Investments LLC | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |
| ORG Partners LLC | – | – | – | – | Not filed |
| Trust Co of Vermont | – | – | – | – | Not filed |