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 |
|---|---|---|---|---|---|
| Winton Group Ltd | 24,900 | $750.0K | 0.03% | +6,000+31.7% | Added |
| Lazard Freres Gestion S.A.S. | 25,830 | $777.0K | 0.02% | 00.0% | Unchanged |
| Capital Group Investment Management Pte. Ltd. | 25,906 | $780.3K | 0.13% | 00.0% | Unchanged |
| Public Employees Retirement Association of Colorado | 25,946 | $781.0K | 0.00% | 00.0% | Unchanged |
| State of Alaska, Department of Revenue | 26,102 | $786.0K | 0.01% | +155+0.6% | Added |
| Segall Bryant & Hamill, LLC | 26,387 | $794.8K | 0.01% | −111−0.4% | Reduced |
| Allstate Corp | 26,760 | $806.0K | 0.01% | +26,760 | New |
| Ridge Creek Global, Inc | 27,055 | $814.9K | 0.69% | −110−0.4% | Reduced |
| Inscription Capital, LLC | 27,426 | $826.1K | 0.09% | +2,844+11.6% | Added |
| Equitable Trust Co | 27,886 | $839.9K | 0.04% | −446−1.6% | Reduced |
| Natixis Advisors, L.P. | 27,891 | $840.0K | 0.00% | −2,743−9.0% | Reduced |
| Regal Investment Advisors LLC | 29,250 | $881.0K | 0.05% | +10,119+52.9% | Added |
| Oddo BHF Asset Management SAS | 29,384 | $885.0K | 0.03% | −9,000−23.4% | Reduced |
| Quantbot Technologies LP | 29,413 | $885.9K | 0.04% | +26,113+791.3% | Added |
| D.A. Davidson & Co. | 29,980 | $903.0K | 0.01% | −365−1.2% | Reduced |
| PFG Investments, LLC | 31,058 | $935.5K | 0.04% | +31,058 | New |
| New York Life Investment Management LLC | 31,077 | $936.0K | 0.01% | +7,568+32.2% | Added |
| Brinker Capital Investments, LLC | 31,138 | $937.9K | 0.01% | −27,059−46.5% | Reduced |
| Federated Hermes, Inc. | 31,188 | $939.4K | 0.00% | −297−0.9% | Reduced |
| Vancity Investment Management Ltd | 31,226 | $941.0K | 0.15% | −4,377−12.3% | Reduced |
| CAPROCK Group, Inc. | 31,293 | $942.6K | 0.02% | +1,628+5.5% | Added |
| JustInvest LLC | 31,439 | $946.9K | 0.01% | −5,087−13.9% | Reduced |
| Twinbeech Capital LP | 32,500 | $978.9K | 0.10% | −168,000−83.8% | Reduced |
| Syon Capital LLC | 32,506 | $979.1K | 0.05% | −5,457−14.4% | Reduced |
| Tributary Capital Management, LLC | 32,599 | $981.9K | 0.10% | +364+1.1% | Added |
| Legacy Wealth Asset Management, LLC | 33,060 | $995.8K | 0.24% | +3,675+12.5% | Added |
| Hillsdale Investment Management Inc. | 33,350 | $1.00M | 0.03% | +5,850+21.3% | Added |
| Atria Investments LLC | 33,935 | $1.02M | 0.01% | −8,439−19.9% | Reduced |
| Lazard Asset Management LLC | 35,218 | $1.06M | 0.00% | −81,379−69.8% | Reduced |
| Kestra Investment Management, LLC | 36,546 | $1.10M | 0.02% | +36,546 | New |
| Cetera Investment Advisers | 37,458 | $1.13M | 0.00% | −13,801−26.9% | Reduced |
| Formula Growth Ltd | 39,050 | $1.18M | 0.53% | 00.0% | Unchanged |
| Advisory Services Network, LLC | 39,117 | $1.18M | 0.02% | +31,580+419.0% | Added |
| O'Shaughnessy Asset Management, LLC | 39,652 | $1.19M | 0.01% | +5,593+16.4% | Added |
| Hunter Associates Investment Management LLC | 40,194 | $1.21M | 0.16% | +6,785+20.3% | Added |
| Alps Advisors Inc | 40,571 | $1.22M | 0.01% | +7,780+23.7% | Added |
| Virginia Retirement Systems Et Al | 40,870 | $1.23M | 0.01% | +200+0.5% | Added |
| Wealth Enhancement Advisory Services, LLC | 39,642 | $1.23M | 0.00% | −25,846−39.5% | Reduced |
| Davy Global Fund Management Ltd | 41,487 | $1.25M | 0.09% | +82+0.2% | Added |
| Victory Capital Management Inc | 41,659 | $1.25M | 0.00% | +2,318+5.9% | Added |
| Aquatic Capital Management LLC | 42,307 | $1.27M | 0.04% | −21,327−33.5% | Reduced |
| Teacher Retirement System of Texas | 43,811 | $1.32M | 0.01% | +3,861+9.7% | Added |
| Radnor Capital Management, LLC | 44,220 | $1.33M | 0.20% | +4,200+10.5% | Added |
| Northwest & Ethical Investments L.P. | 44,382 | $1.34M | 0.03% | +1,314+3.1% | Added |
| Xponance, Inc. | 44,932 | $1.35M | 0.01% | +10,892+32.0% | Added |
| CenterBook Partners LP | 46,039 | $1.39M | 0.07% | −57,735−55.6% | Reduced |
| South Dakota Investment Council | 47,072 | $1.42M | 0.03% | 00.0% | Unchanged |
| Skandinaviska Enskilda Banken AB (publ) | 47,644 | $1.43M | 0.03% | −258,469−84.4% | Reduced |
| Zions Bancorporation, National Association | 48,059 | $1.45M | 0.09% | −27,983−36.8% | Reduced |
| WCM Investment Management, LLC | 48,665 | $1.45M | 0.00% | +1,399+3.0% | Added |
| Bridgefront Capital, LLC | 48,471 | $1.46M | 0.36% | −15,407−24.1% | Reduced |
| Exchange Traded Concepts, LLC | 48,928 | $1.47M | 0.01% | −11,822−19.5% | Reduced |
| Stifel Financial Corp | 48,953 | $1.47M | 0.00% | −52,774−51.9% | Reduced |
| Colony Group, LLC | 50,026 | $1.53M | 0.00% | −17,710−26.1% | Reduced |
| Freestone Grove Partners LP | 51,353 | $1.55M | 0.01% | +51,353 | New |
| CBOE Vest Financial, LLC | 52,889 | $1.59M | 0.02% | +52,889 | New |
| Oregon Public Employees Retirement Fund | 53,525 | $1.61M | 0.02% | +1,600+3.1% | Added |
| Citigroup Inc | 53,606 | $1.61M | 0.00% | −168,433−75.9% | Reduced |
| New Mexico Educational Retirement Board | 54,500 | $1.64M | 0.05% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 54,966 | $1.65M | 0.00% | +19,760+56.1% | Added |
| Sciencast Management LP | 55,578 | $1.67M | 0.21% | +28,356+104.2% | Added |
| Captrust Financial Advisors | 55,627 | $1.68M | 0.00% | −11,452−17.1% | Reduced |
| Daiwa Securities Group Inc. | 56,800 | $1.71M | 0.00% | −5,800−9.3% | Reduced |
| New Age Alpha Advisors, LLC | 57,604 | $1.74M | 0.08% | −1,264−2.1% | Reduced |
| Nordea Investment Management AB | 58,506 | $1.75M | 0.00% | +17,585+43.0% | Added |
| Northwestern Mutual Investment Management Company, LLC | 58,429 | $1.76M | 0.03% | −60−0.1% | Reduced |
| Voya Investment Management LLC | 58,740 | $1.77M | 0.00% | +38,187+185.8% | Added |
| Cerity Partners LLC | 60,095 | $1.81M | 0.00% | −100,134−62.5% | Reduced |
| Franklin Resources Inc | 61,542 | $1.85M | 0.00% | −5,814−8.6% | Reduced |
| Summit Trail Advisors, LLC | 61,701 | $1.86M | 0.03% | +8,916+16.9% | Added |
| Thrivent Financial for Lutherans | 62,123 | $1.87M | 0.00% | +2,786+4.7% | Added |
| State of Michigan Retirement System | 62,740 | $1.89M | 0.01% | +1,000+1.6% | Added |
| Vanguard Investments Australia, Ltd. | 62,891 | $1.89M | 0.01% | +62,891 | New |
| Penobscot Investment Management Company, Inc. | 63,030 | $1.90M | 0.15% | −5,965−8.6% | Reduced |
| Schonfeld Strategic Advisors LLC | 63,778 | $1.92M | 0.02% | +54,092+558.5% | Added |
| KLP Kapitalforvaltning AS | 64,200 | $1.93M | 0.01% | +1,500+2.4% | Added |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 65,347 | $1.97M | 0.01% | −71−0.1% | Reduced |
| D'Orazio & Associates, Inc. | 65,356 | $1.97M | 0.25% | −39−0.1% | Reduced |
| Capital International Inc | 66,336 | $2.00M | 0.02% | −29,121−30.5% | Reduced |
| Ameritas Investment Partners, Inc. | 66,850 | $2.01M | 0.06% | 00.0% | Unchanged |
| Arizona State Retirement System | 68,151 | $2.05M | 0.01% | −1,193−1.7% | Reduced |
| Engineers Gate Manager LP | 69,161 | $2.08M | 0.03% | +975+1.4% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 69,265 | $2.09M | 0.00% | 00.0% | Unchanged |
| Boothbay Fund Management, LLC | 70,195 | $2.11M | 0.05% | +70,195 | New |
| Relyea Zuckerberg Hanson LLC | 70,468 | $2.12M | 0.21% | −12,188−14.7% | Reduced |
| Mercer Global Advisors Inc | 70,558 | $2.13M | 0.00% | −7,966−10.1% | Reduced |
| Trexquant Investment LP | 70,995 | $2.14M | 0.02% | −33,136−31.8% | Reduced |
| Montanaro Asset Management Ltd | 71,500 | $2.15M | 0.64% | +71,500 | New |
| Pacer Advisors, Inc. | 72,043 | $2.17M | 0.01% | +2,490+3.6% | Added |
| HighTower Advisors, LLC | 72,484 | $2.18M | 0.00% | −2,882−3.8% | Reduced |
| Pathstone Holdings, LLC | 74,370 | $2.24M | 0.01% | −5,830−7.3% | Reduced |
| Louisiana State Employees Retirement System | 75,600 | $2.28M | 0.04% | +3,300+4.6% | Added |
| Catalyst Capital Advisors LLC | 75,660 | $2.28M | 0.04% | 00.0% | Unchanged |
| PDT Partners, LLC | 75,758 | $2.28M | 0.14% | −118,188−60.9% | Reduced |
| Staley Capital Advisers Inc | 76,835 | $2.31M | 0.10% | 00.0% | Unchanged |
| Federation des caisses Desjardins du Quebec | 76,841 | $2.31M | 0.01% | +1,075+1.4% | Added |
| Yousif Capital Management, LLC | 77,965 | $2.35M | 0.03% | −4,324−5.3% | Reduced |
| Public Employees Retirement System of Ohio | 78,121 | $2.35M | 0.01% | −3,302−4.1% | Reduced |
| Fifth Third Bancorp | 78,175 | $2.35M | 0.00% | +74,460+2,004.3% | Added |
| Teachers Retirement System of the State of Kentucky | 79,425 | $2.39M | 0.02% | 00.0% | Unchanged |