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 |
|---|---|---|---|---|---|
| Russell Investments Group, Ltd. | 329,945 | $9.94M | 0.01% | +116,961+54.9% | Added |
| FMR LLC | 328,252 | $9.89M | 0.00% | −24,978−7.1% | Reduced |
| SEI Investments Co | 315,284 | $9.49M | 0.01% | +42,759+15.7% | Added |
| Baillie Gifford & Co | 313,565 | $9.44M | 0.01% | −115,210−26.9% | Reduced |
| Nomura Asset Management International Inc. | 311,391 | $9.38M | 0.02% | −2,904−0.9% | Reduced |
| Intech Investment Management LLC | 309,511 | $9.32M | 0.09% | +218,967+241.8% | Added |
| State of Wisconsin Investment Board | 298,905 | $9.00M | 0.02% | −16,928−5.4% | Reduced |
| Renaissance Investment Group LLC | 295,017 | $8.89M | 1.91% | +2,869+1.0% | Added |
| California State Teachers Retirement System | 290,497 | $8.75M | 0.01% | +52,423+22.0% | Added |
| Systematic Financial Management LP | 286,651 | $8.63M | 0.20% | −1210.0% | Reduced |
| DekaBank Deutsche Girozentrale | 279,017 | $8.44M | 0.01% | 00.0% | Unchanged |
| Millennium Management LLC | 266,573 | $8.03M | 0.01% | −388,916−59.3% | Reduced |
| New York State Teachers Retirement System | 264,667 | $7.97M | 0.02% | +16,622+6.7% | Added |
| Bahl & Gaynor Inc | 260,957 | $7.86M | 0.04% | +33,762+14.9% | Added |
| Candriam Luxembourg S.C.A. | 259,365 | $7.81M | 0.04% | +35,170+15.7% | Added |
| Williams Jones Wealth Management, LLC. | 256,290 | $7.72M | 0.09% | +78,230+43.9% | Added |
| Bank of Montreal | 252,278 | $7.60M | 0.00% | −35,830−12.4% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 244,492 | $7.36M | 0.14% | +106,792+77.6% | Added |
| HBK Investments L P | 239,028 | $7.20M | 0.09% | +162,628+212.9% | Added |
| GHP Investment Advisors, Inc. | 226,439 | $6.82M | 0.28% | −5,915−2.5% | Reduced |
| Man Group plc | 217,545 | $6.55M | 0.01% | −161,748−42.6% | Reduced |
| Dana Investment Advisors, Inc. | 215,080 | $6.48M | 0.19% | −482−0.2% | Reduced |
| Bridgewater Associates, LP | 213,945 | $6.44M | 0.03% | +149,644+232.7% | Added |
| Capital International Sarl | 211,477 | $6.37M | 0.10% | +4,244+2.0% | Added |
| Duff & Phelps Investment Management Co | 211,038 | $6.36M | 0.07% | +82,390+64.0% | Added |
| State Board of Administration of Florida Retirement System | 208,583 | $6.28M | 0.01% | 00.0% | Unchanged |
| Jane Street Group, LLC | 206,806 | $6.23M | 0.01% | −48,028−18.8% | Reduced |
| AlpenGlobal Capital LLC | 107,315 | $6.23M | 3.96% | +107,315 | New |
| Nicholas Company, Inc. | 204,305 | $6.15M | 0.12% | −9,970−4.7% | Reduced |
| Algert Global LLC | 202,109 | $6.09M | 0.09% | −237,425−54.0% | Reduced |
| Gotham Asset Management, LLC | 195,026 | $5.87M | 0.02% | −258,444−57.0% | Reduced |
| Vanguard Asset Management, Ltd | 189,947 | $5.72M | 0.00% | +189,947 | New |
| Manufacturers Life Insurance Company, The | 186,263 | $5.61M | 0.00% | −4,519−2.4% | Reduced |
| New York State Common Retirement Fund | 186,057 | $5.60M | 0.01% | +6,967+3.9% | Added |
| Two Sigma Investments, LP | 183,765 | $5.54M | 0.00% | −452,984−71.1% | Reduced |
| Caisse de Depot Et Placement du Quebec | 181,185 | $5.46M | 0.01% | +181,185 | New |
| Raymond James Financial Inc | 177,867 | $5.36M | 0.00% | −344−0.2% | Reduced |
| Night Squared LP | 174,738 | $5.26M | 0.77% | +101,905+139.9% | Added |
| La Banque Postale Asset Management SA | 174,171 | $5.25M | 0.07% | +167,239+2,412.6% | Added |
| Prudential Financial Inc | 164,220 | $4.95M | 0.01% | +147,675+892.6% | Added |
| Susquehanna International Group, LLP | 160,236 | $4.83M | 0.01% | +160,236 | New |
| Canada Pension Plan Investment Board | 160,200 | $4.83M | 0.00% | +138,000+621.6% | Added |
| Weiss Asset Management LP | 159,398 | $4.80M | 0.09% | +159,398 | New |
| Blair William & Co | 158,442 | $4.77M | 0.01% | +34,925+28.3% | Added |
| Crossmark Global Holdings, Inc. | 152,384 | $4.59M | 0.07% | −64,533−29.8% | Reduced |
| LPL Financial LLC | 152,169 | $4.58M | 0.00% | −193,850−56.0% | Reduced |
| Creative Planning | 151,623 | $4.57M | 0.00% | −35,723−19.1% | Reduced |
| Great West Life Assurance Co | 150,735 | $4.54M | 0.01% | +3,896+2.7% | Added |
| Bleakley Financial Group, LLC | 147,938 | $4.46M | 0.07% | +111,493+305.9% | Added |
| SFE Investment Counsel | 147,431 | $4.44M | 0.71% | +45,009+43.9% | Added |
| Advisors Asset Management, Inc. | 144,179 | $4.34M | 0.07% | +11,858+9.0% | Added |
| Portman Square Capital LLP | 144,061 | $4.34M | 0.66% | −58,763−29.0% | Reduced |
| Future Fund LLC | 137,347 | $4.14M | 1.45% | +48,535+54.6% | Added |
| Caxton Associates LLP | 135,813 | $4.09M | 0.09% | +135,813 | New |
| Public Sector Pension Investment Board | 134,888 | $4.06M | 0.01% | +134,888 | New |
| River Wealth Advisors LLC | 133,260 | $4.01M | 0.46% | −12,544−8.6% | Reduced |
| Capital International Ltd | 133,039 | $4.01M | 0.15% | 00.0% | Unchanged |
| MetLife Investment Management | 130,461 | $3.93M | 0.02% | +356+0.3% | Added |
| Mackenzie Financial Corp | 130,311 | $3.92M | 0.00% | −201,658−60.7% | Reduced |
| Crown Advisors Management, Inc. | 125,000 | $3.77M | 2.50% | 00.0% | Unchanged |
| Rice Hall James & Associates, LLC | 122,955 | $3.70M | 0.21% | +27,117+28.3% | Added |
| Edgestream Partners, L.P. | 121,937 | $3.67M | 0.12% | +33,442+37.8% | Added |
| Rock Point Advisors, LLC | 119,051 | $3.59M | 0.97% | +119,051 | New |
| Amalgamated Bank | 118,784 | $3.58M | 0.03% | +880+0.7% | Added |
| Oak Thistle LLC | 117,586 | $3.54M | 0.34% | +117,586 | New |
| First National Bank of Omaha | 115,593 | $3.48M | 0.11% | +17,862+18.3% | Added |
| Treasurer of the State of North Carolina | 111,245 | $3.35M | 0.01% | +1,243+1.1% | Added |
| Asset Management One Co.,Ltd. | 110,981 | $3.34M | 0.01% | +12,885+13.1% | Added |
| Police & Firemen's Retirement System of New Jersey | 109,294 | $3.29M | 0.03% | −1,102−1.0% | Reduced |
| State of Tennessee, Treasury Department | 109,250 | $3.29M | 0.01% | +5,655+5.5% | Added |
| Kennedy Capital Management, Inc. | 105,288 | $3.17M | 0.07% | −1,309−1.2% | Reduced |
| Vanguard Global Advisers, LLC | 104,773 | $3.16M | 0.00% | +104,773 | New |
| Scholtz & Company, LLC | 103,195 | $3.11M | 1.59% | +103,195 | New |
| Nisa Investment Advisors, LLC | 102,084 | $3.07M | 0.01% | +239+0.2% | Added |
| Agf Management Ltd | 100,841 | $3.04M | 0.01% | +16,281+19.3% | Added |
| Edmond de Rothschild Holding S.A. | 100,325 | $3.02M | 0.04% | +8,172+8.9% | Added |
| Louisbourg Investments Inc. | 119,970 | $3.02M | 0.57% | +119,970 | New |
| Kingdon Capital Management, L.L.C. | 100,000 | $3.01M | 0.50% | −50,000−33.3% | Reduced |
| Mutual of America Capital Management LLC | 99,948 | $3.01M | 0.03% | −8,847−8.1% | Reduced |
| Isthmus Partners, LLC | 98,876 | $2.98M | 0.31% | −12,761−11.4% | Reduced |
| Zacks Investment Management | 96,757 | $2.91M | 0.02% | +9,865+11.4% | Added |
| Los Angeles Capital Management LLC | 96,085 | $2.89M | 0.01% | −125,385−56.6% | Reduced |
| Swiss Life Asset Management Ltd | 93,898 | $2.83M | 0.01% | −21,969−19.0% | Reduced |
| One Capital Management, LLC | 91,196 | $2.75M | 0.08% | +20,156+28.4% | Added |
| Taproot Management LP | 89,364 | $2.69M | 0.51% | +58,517+189.7% | Added |
| Union Bancaire Privee, UBP SA | 90,344 | $2.69M | 0.05% | +194+0.2% | Added |
| Lombard Odier Asset Management (Europe) Ltd | 86,962 | $2.62M | 0.14% | −17,936−17.1% | Reduced |
| State of New Jersey Common Pension Fund D | 85,427 | $2.57M | 0.01% | 00.0% | Unchanged |
| XTX Topco Ltd | 84,940 | $2.56M | 0.04% | +61,849+267.8% | Added |
| Moran Wealth Management, LLC | 84,145 | $2.53M | 0.08% | −81,923−49.3% | Reduced |
| Alpine Woods Capital Investors, LLC | 84,047 | $2.53M | 0.61% | −18,761−18.2% | Reduced |
| S&T Bank | 82,482 | $2.48M | 0.93% | −29,552−26.4% | Reduced |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 81,959 | $2.47M | 0.00% | −53,572−39.5% | Reduced |
| Teachers Retirement System of the State of Kentucky | 79,425 | $2.39M | 0.02% | 00.0% | Unchanged |
| Fifth Third Bancorp | 78,175 | $2.35M | 0.00% | +74,460+2,004.3% | Added |
| Public Employees Retirement System of Ohio | 78,121 | $2.35M | 0.01% | −3,302−4.1% | Reduced |
| Yousif Capital Management, LLC | 77,965 | $2.35M | 0.03% | −4,324−5.3% | Reduced |
| Federation des caisses Desjardins du Quebec | 76,841 | $2.31M | 0.01% | +1,075+1.4% | Added |
| Staley Capital Advisers Inc | 76,835 | $2.31M | 0.10% | 00.0% | Unchanged |
| PDT Partners, LLC | 75,758 | $2.28M | 0.14% | −118,188−60.9% | Reduced |