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 |
|---|---|---|---|---|---|
| Catalyst Capital Advisors LLC | 75,660 | $2.28M | 0.04% | 00.0% | Unchanged |
| Louisiana State Employees Retirement System | 75,600 | $2.28M | 0.04% | +3,300+4.6% | Added |
| Pathstone Holdings, LLC | 74,370 | $2.24M | 0.01% | −5,830−7.3% | Reduced |
| HighTower Advisors, LLC | 72,484 | $2.18M | 0.00% | −2,882−3.8% | Reduced |
| Pacer Advisors, Inc. | 72,043 | $2.17M | 0.01% | +2,490+3.6% | Added |
| Montanaro Asset Management Ltd | 71,500 | $2.15M | 0.64% | +71,500 | New |
| Trexquant Investment LP | 70,995 | $2.14M | 0.02% | −33,136−31.8% | Reduced |
| Mercer Global Advisors Inc | 70,558 | $2.13M | 0.00% | −7,966−10.1% | Reduced |
| Relyea Zuckerberg Hanson LLC | 70,468 | $2.12M | 0.21% | −12,188−14.7% | Reduced |
| Boothbay Fund Management, LLC | 70,195 | $2.11M | 0.05% | +70,195 | New |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 69,265 | $2.09M | 0.00% | 00.0% | Unchanged |
| Engineers Gate Manager LP | 69,161 | $2.08M | 0.03% | +975+1.4% | Added |
| Arizona State Retirement System | 68,151 | $2.05M | 0.01% | −1,193−1.7% | Reduced |
| Ameritas Investment Partners, Inc. | 66,850 | $2.01M | 0.06% | 00.0% | Unchanged |
| Capital International Inc | 66,336 | $2.00M | 0.02% | −29,121−30.5% | Reduced |
| D'Orazio & Associates, Inc. | 65,356 | $1.97M | 0.25% | −39−0.1% | Reduced |
| Commonwealth of Pennsylvania Public School Empls Retrmt Sys | 65,347 | $1.97M | 0.01% | −71−0.1% | Reduced |
| KLP Kapitalforvaltning AS | 64,200 | $1.93M | 0.01% | +1,500+2.4% | Added |
| Schonfeld Strategic Advisors LLC | 63,778 | $1.92M | 0.02% | +54,092+558.5% | Added |
| Penobscot Investment Management Company, Inc. | 63,030 | $1.90M | 0.15% | −5,965−8.6% | Reduced |
| Vanguard Investments Australia, Ltd. | 62,891 | $1.89M | 0.01% | +62,891 | New |
| State of Michigan Retirement System | 62,740 | $1.89M | 0.01% | +1,000+1.6% | Added |
| Thrivent Financial for Lutherans | 62,123 | $1.87M | 0.00% | +2,786+4.7% | Added |
| Summit Trail Advisors, LLC | 61,701 | $1.86M | 0.03% | +8,916+16.9% | Added |
| Franklin Resources Inc | 61,542 | $1.85M | 0.00% | −5,814−8.6% | Reduced |
| Cerity Partners LLC | 60,095 | $1.81M | 0.00% | −100,134−62.5% | Reduced |
| Voya Investment Management LLC | 58,740 | $1.77M | 0.00% | +38,187+185.8% | Added |
| Northwestern Mutual Investment Management Company, LLC | 58,429 | $1.76M | 0.03% | −60−0.1% | Reduced |
| Nordea Investment Management AB | 58,506 | $1.75M | 0.00% | +17,585+43.0% | Added |
| New Age Alpha Advisors, LLC | 57,604 | $1.74M | 0.08% | −1,264−2.1% | Reduced |
| Daiwa Securities Group Inc. | 56,800 | $1.71M | 0.00% | −5,800−9.3% | Reduced |
| Captrust Financial Advisors | 55,627 | $1.68M | 0.00% | −11,452−17.1% | Reduced |
| Sciencast Management LP | 55,578 | $1.67M | 0.21% | +28,356+104.2% | Added |
| Acadian Asset Management LLC | 54,966 | $1.65M | 0.00% | +19,760+56.1% | Added |
| New Mexico Educational Retirement Board | 54,500 | $1.64M | 0.05% | 00.0% | Unchanged |
| Citigroup Inc | 53,606 | $1.61M | 0.00% | −168,433−75.9% | Reduced |
| Oregon Public Employees Retirement Fund | 53,525 | $1.61M | 0.02% | +1,600+3.1% | Added |
| CBOE Vest Financial, LLC | 52,889 | $1.59M | 0.02% | +52,889 | New |
| Freestone Grove Partners LP | 51,353 | $1.55M | 0.01% | +51,353 | New |
| Colony Group, LLC | 50,026 | $1.53M | 0.00% | −17,710−26.1% | Reduced |
| Stifel Financial Corp | 48,953 | $1.47M | 0.00% | −52,774−51.9% | Reduced |
| Exchange Traded Concepts, LLC | 48,928 | $1.47M | 0.01% | −11,822−19.5% | Reduced |
| Bridgefront Capital, LLC | 48,471 | $1.46M | 0.36% | −15,407−24.1% | Reduced |
| WCM Investment Management, LLC | 48,665 | $1.45M | 0.00% | +1,399+3.0% | Added |
| Zions Bancorporation, National Association | 48,059 | $1.45M | 0.09% | −27,983−36.8% | Reduced |
| Skandinaviska Enskilda Banken AB (publ) | 47,644 | $1.43M | 0.03% | −258,469−84.4% | Reduced |
| South Dakota Investment Council | 47,072 | $1.42M | 0.03% | 00.0% | Unchanged |
| CenterBook Partners LP | 46,039 | $1.39M | 0.07% | −57,735−55.6% | Reduced |
| Xponance, Inc. | 44,932 | $1.35M | 0.01% | +10,892+32.0% | Added |
| Northwest & Ethical Investments L.P. | 44,382 | $1.34M | 0.03% | +1,314+3.1% | Added |
| Radnor Capital Management, LLC | 44,220 | $1.33M | 0.20% | +4,200+10.5% | Added |
| Teacher Retirement System of Texas | 43,811 | $1.32M | 0.01% | +3,861+9.7% | Added |
| Aquatic Capital Management LLC | 42,307 | $1.27M | 0.04% | −21,327−33.5% | Reduced |
| Victory Capital Management Inc | 41,659 | $1.25M | 0.00% | +2,318+5.9% | Added |
| Davy Global Fund Management Ltd | 41,487 | $1.25M | 0.09% | +82+0.2% | Added |
| Wealth Enhancement Advisory Services, LLC | 39,642 | $1.23M | 0.00% | −25,846−39.5% | Reduced |
| Virginia Retirement Systems Et Al | 40,870 | $1.23M | 0.01% | +200+0.5% | Added |
| Alps Advisors Inc | 40,571 | $1.22M | 0.01% | +7,780+23.7% | Added |
| Hunter Associates Investment Management LLC | 40,194 | $1.21M | 0.16% | +6,785+20.3% | Added |
| O'Shaughnessy Asset Management, LLC | 39,652 | $1.19M | 0.01% | +5,593+16.4% | Added |
| Advisory Services Network, LLC | 39,117 | $1.18M | 0.02% | +31,580+419.0% | Added |
| Formula Growth Ltd | 39,050 | $1.18M | 0.53% | 00.0% | Unchanged |
| Cetera Investment Advisers | 37,458 | $1.13M | 0.00% | −13,801−26.9% | Reduced |
| Kestra Investment Management, LLC | 36,546 | $1.10M | 0.02% | +36,546 | New |
| Lazard Asset Management LLC | 35,218 | $1.06M | 0.00% | −81,379−69.8% | Reduced |
| Atria Investments LLC | 33,935 | $1.02M | 0.01% | −8,439−19.9% | Reduced |
| Hillsdale Investment Management Inc. | 33,350 | $1.00M | 0.03% | +5,850+21.3% | Added |
| Legacy Wealth Asset Management, LLC | 33,060 | $995.8K | 0.24% | +3,675+12.5% | Added |
| Tributary Capital Management, LLC | 32,599 | $981.9K | 0.10% | +364+1.1% | Added |
| Syon Capital LLC | 32,506 | $979.1K | 0.05% | −5,457−14.4% | Reduced |
| Twinbeech Capital LP | 32,500 | $978.9K | 0.10% | −168,000−83.8% | Reduced |
| JustInvest LLC | 31,439 | $946.9K | 0.01% | −5,087−13.9% | Reduced |
| CAPROCK Group, Inc. | 31,293 | $942.6K | 0.02% | +1,628+5.5% | Added |
| Vancity Investment Management Ltd | 31,226 | $941.0K | 0.15% | −4,377−12.3% | Reduced |
| Federated Hermes, Inc. | 31,188 | $939.4K | 0.00% | −297−0.9% | Reduced |
| Brinker Capital Investments, LLC | 31,138 | $937.9K | 0.01% | −27,059−46.5% | Reduced |
| New York Life Investment Management LLC | 31,077 | $936.0K | 0.01% | +7,568+32.2% | Added |
| PFG Investments, LLC | 31,058 | $935.5K | 0.04% | +31,058 | New |
| D.A. Davidson & Co. | 29,980 | $903.0K | 0.01% | −365−1.2% | Reduced |
| Quantbot Technologies LP | 29,413 | $885.9K | 0.04% | +26,113+791.3% | Added |
| Oddo BHF Asset Management SAS | 29,384 | $885.0K | 0.03% | −9,000−23.4% | Reduced |
| Regal Investment Advisors LLC | 29,250 | $881.0K | 0.05% | +10,119+52.9% | Added |
| Natixis Advisors, L.P. | 27,891 | $840.0K | 0.00% | −2,743−9.0% | Reduced |
| Equitable Trust Co | 27,886 | $839.9K | 0.04% | −446−1.6% | Reduced |
| Inscription Capital, LLC | 27,426 | $826.1K | 0.09% | +2,844+11.6% | Added |
| Ridge Creek Global, Inc | 27,055 | $814.9K | 0.69% | −110−0.4% | Reduced |
| Allstate Corp | 26,760 | $806.0K | 0.01% | +26,760 | New |
| Segall Bryant & Hamill, LLC | 26,387 | $794.8K | 0.01% | −111−0.4% | Reduced |
| State of Alaska, Department of Revenue | 26,102 | $786.0K | 0.01% | +155+0.6% | Added |
| Public Employees Retirement Association of Colorado | 25,946 | $781.0K | 0.00% | 00.0% | Unchanged |
| Capital Group Investment Management Pte. Ltd. | 25,906 | $780.3K | 0.13% | 00.0% | Unchanged |
| Lazard Freres Gestion S.A.S. | 25,830 | $777.0K | 0.02% | 00.0% | Unchanged |
| Winton Group Ltd | 24,900 | $750.0K | 0.03% | +6,000+31.7% | Added |
| Quadrant Capital Group LLC | 24,611 | $741.3K | 0.02% | −1,180−4.6% | Reduced |
| Axq Capital, LP | 24,442 | $736.2K | 0.09% | +7,348+43.0% | Added |
| Guggenheim Capital LLC | 24,206 | $729.1K | 0.01% | +16,787+226.3% | Added |
| Bailard, Inc. | 24,200 | $728.9K | 0.02% | 00.0% | Unchanged |
| Baird Financial Group, Inc. | 23,909 | $720.1K | 0.00% | +3,810+19.0% | Added |
| Perigon Wealth Management, LLC | 23,838 | $718.0K | 0.01% | −5,562−18.9% | Reduced |
| IMC-Chicago, LLC | 23,740 | $715.0K | 0.01% | +23,740 | New |