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 |
|---|---|---|---|---|---|
| Toroso Investments, LLC | 384,286 | $11.6M | 0.04% | +60,940+18.8% | Added |
| iA Global Asset Management Inc. | 389,511 | $11.7M | 0.17% | −328,168−45.7% | Reduced |
| Nicola Wealth Management Ltd. | 411,000 | $12.4M | 1.49% | +46,000+12.6% | Added |
| Ninety One North America, Inc. | 413,149 | $12.4M | 0.56% | −2,386−0.6% | Reduced |
| Squarepoint Ops LLC | 417,343 | $12.6M | 0.03% | +348,487+506.1% | Added |
| Handelsbanken Fonder AB | 418,775 | $12.6M | 0.04% | −97,268−18.8% | Reduced |
| Envestnet Asset Management Inc | 420,272 | $12.7M | 0.00% | −146,529−25.9% | Reduced |
| HSBC Holdings PLC | 430,972 | $13.0M | 0.01% | −158,566−26.9% | Reduced |
| Winslow Asset Management Inc | 432,538 | $13.0M | 2.53% | −9,062−2.1% | Reduced |
| Balyasny Asset Management LLC | 434,471 | $13.1M | 0.03% | +434,471 | New |
| SG Americas Securities, LLC | 435,175 | $13.1M | 0.01% | +170,695+64.5% | Added |
| Sarasin & Partners LLP | 436,170 | $13.1M | 0.16% | +25,108+6.1% | Added |
| Barclays PLC | 443,997 | $13.4M | 0.00% | +36,499+9.0% | Added |
| one8zero8, LLC | 451,472 | $13.6M | 3.03% | −8,974−1.9% | Reduced |
| Renaissance Technologies LLC | 453,600 | $13.7M | 0.02% | −55,100−10.8% | Reduced |
| Ci Investments Inc. | 461,855 | $13.9M | 0.07% | −5,272−1.1% | Reduced |
| Retirement Systems of Alabama | 479,604 | $14.4M | 0.05% | +5,994+1.3% | Added |
| Swiss National Bank | 491,000 | $14.8M | 0.01% | −1,300−0.3% | Reduced |
| California Public Employees Retirement System | 498,245 | $15.0M | 0.01% | −19,123−3.7% | Reduced |
| Point72 Asset Management, L.P. | 542,267 | $16.3M | 0.03% | +542,267 | New |
| Arrowstreet Capital, Limited Partnership | 543,466 | $16.4M | 0.01% | −478,786−46.8% | Reduced |
| Principal Financial Group Inc | 583,252 | $17.6M | 0.01% | +20,951+3.7% | Added |
| Price T Rowe Associates Inc | 584,462 | $17.6M | 0.00% | +170,939+41.3% | Added |
| Bank of Nova Scotia | 589,454 | $17.8M | 0.03% | −311,851−34.6% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 602,668 | $18.2M | 0.04% | +79,469+15.2% | Added |
| Mirova | 611,722 | $18.4M | 0.75% | +342,025+126.8% | Added |
| Fisher Asset Management, LLC | 612,602 | $18.5M | 0.01% | −8,596−1.4% | Reduced |
| Trillium Asset Management, LLC | 600,385 | $18.6M | 0.62% | +209,056+53.4% | Added |
| Rockefeller Capital Management L.P. | 626,533 | $18.9M | 0.03% | +71,081+12.8% | Added |
| UBS Group AG | 646,671 | $19.5M | 0.00% | −19,067−2.9% | Reduced |
| BNP Paribas Arbitrage, SA | 695,204 | $20.9M | 0.01% | −306,872−30.6% | Reduced |
| Robeco Institutional Asset Management B.V. | 707,129 | $21.3M | 0.03% | −32,775−4.4% | Reduced |
| Rhumbline Advisers | 713,767 | $21.5M | 0.02% | +14,302+2.0% | Added |
| Marshall Wace, LLP | 719,618 | $21.7M | 0.02% | +624,564+657.1% | Added |
| Premier Fund Managers Ltd | 805,589 | $24.0M | 1.70% | −330,546−29.1% | Reduced |
| Royal Bank of Canada | 844,444 | $25.4M | 0.00% | −4,885−0.6% | Reduced |
| Schroder Investment Management Group | 864,789 | $25.7M | 0.02% | +222,338+34.6% | Added |
| Nomura Asset Management Co Ltd | 880,377 | $26.5M | 0.07% | −112,256−11.3% | Reduced |
| Wells Fargo & Company | 880,796 | $26.5M | 0.01% | −43,423−4.7% | Reduced |
| Managed Asset Portfolios, LLC | 886,859 | $26.7M | 3.20% | +41,579+4.9% | Added |
| JPMorgan Chase & Co | 914,908 | $27.2M | 0.00% | −65,057−6.6% | Reduced |
| Value Holdings Management Co. LLC | 907,325 | $27.3M | 4.43% | 00.0% | Unchanged |
| Legal & General Group Plc | 913,770 | $27.5M | 0.01% | +530,550+138.4% | Added |
| Nuveen, LLC | 936,404 | $28.2M | 0.01% | −279,924−23.0% | Reduced |
| L1 Capital International Pty Ltd | 956,166 | $28.8M | 1.72% | +956,166 | New |
| Janus Henderson Group PLC | 1,029,853 | $31.0M | 0.01% | −931,437−47.5% | Reduced |
| Capital Research Global Investors | 1,102,450 | $33.2M | 0.01% | −673,316−37.9% | Reduced |
| UBS Asset Management Americas Inc | 1,148,269 | $34.6M | 0.01% | +15,318+1.4% | Added |
| PGGM Investments | 1,253,857 | $37.8M | 0.66% | −127,160−9.2% | Reduced |
| Neumeier Poma Investment Counsel LLC | 1,303,913 | $39.3M | 3.24% | +177,310+15.7% | Added |
| Bank of America Corp | 1,371,136 | $41.3M | 0.00% | −648,575−32.1% | Reduced |
| CI Private Wealth, LLC | 1,389,823 | $41.8M | 0.06% | −147,470−9.6% | Reduced |
| Standard Life Aberdeen plc | 1,422,213 | $42.8M | 0.07% | −77,124−5.1% | Reduced |
| Bessemer Group Inc | 1,432,005 | $43.1M | 0.07% | +36,966+2.6% | Added |
| AQR Capital Management LLC | 1,514,462 | $45.4M | 0.02% | −1,360,910−47.3% | Reduced |
| Quantinno Capital Management LP | 1,551,176 | $46.7M | 0.08% | +33,162+2.2% | Added |
| Vanguard Fiduciary Trust Co | 1,628,344 | $49.0M | 0.01% | +1,628,344 | New |
| Allianz Asset Management GmbH | 1,730,038 | $52.1M | 0.06% | +143,152+9.0% | Added |
| Deutsche Bank AG | 1,733,696 | $52.2M | 0.02% | +347,889+25.1% | Added |
| Citadel Advisors LLC | 1,740,911 | $52.4M | 0.04% | +1,690,318+3,341.0% | Added |
| King Luther Capital Management Corp | 1,785,465 | $53.8M | 0.23% | +194,549+12.2% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 1,918,681 | $57.8M | 0.08% | +92,614+5.1% | Added |
| Goldman Sachs Group Inc | 1,926,668 | $58.0M | 0.01% | +372,322+24.0% | Added |
| Aviva PLC | 1,926,795 | $58.0M | 0.10% | −112,469−5.5% | Reduced |
| Ameriprise Financial Inc | 2,020,925 | $60.9M | 0.01% | −592,702−22.7% | Reduced |
| Charles Schwab Investment Management Inc | 2,237,257 | $67.4M | 0.01% | +78,267+3.6% | Added |
| Morgan Stanley | 2,239,504 | $67.5M | 0.00% | −81,236−3.5% | Reduced |
| Van Berkom & Associates Inc. | 2,285,788 | $68.8M | 2.24% | −6,807−0.3% | Reduced |
| Robeco Schweiz AG | 2,287,250 | $68.9M | 1.46% | −59,854−2.6% | Reduced |
| M&G Plc | 2,318,534 | $69.6M | 0.36% | −87,052−3.6% | Reduced |
| Northern Trust Corp | 2,320,311 | $69.9M | 0.01% | −30,612−1.3% | Reduced |
| Bank of New York Mellon Corp | 2,348,637 | $70.7M | 0.01% | −7,911−0.3% | Reduced |
| First Trust Advisors LP | 2,445,482 | $73.7M | 0.05% | +788,491+47.6% | Added |
| Ninety One UK Ltd | 2,731,721 | $82.3M | 0.19% | −71,270−2.5% | Reduced |
| Invesco Ltd. | 2,934,900 | $88.4M | 0.01% | +364,793+14.2% | Added |
| Alliancebernstein L.P. | 2,807,465 | $94.2M | 0.03% | −271,534−8.8% | Reduced |
| LGT Group Foundation | 3,161,708 | $95.2M | 1.16% | +100,419+3.3% | Added |
| Fuller & Thaler Asset Management, Inc. | 3,314,443 | $99.8M | 0.34% | +3,314,443 | New |
| Fernbridge Capital Management LP | 3,400,775 | $102.4M | 6.56% | +333,934+10.9% | Added |
| Dimensional Fund Advisors LP | 3,789,240 | $114.1M | 0.02% | +112,560+3.1% | Added |
| Impax Asset Management Group plc | 3,830,074 | $115.4M | 0.80% | +621,884+19.4% | Added |
| Amundi | 4,749,247 | $143.1M | 0.04% | −346,550−6.8% | Reduced |
| Wellington Management Group LLP | 4,804,049 | $144.7M | 0.03% | +3,748,775+355.2% | Added |
| FIL Ltd | 4,832,672 | $145.6M | 0.11% | +164,714+3.5% | Added |
| Geode Capital Management, LLC | 5,217,448 | $157.2M | 0.01% | +135,106+2.7% | Added |
| Sands Capital Management, LLC | 6,658,823 | $200.6M | 0.79% | −348,181−5.0% | Reduced |
| Neuberger Berman Group LLC | 7,269,657 | $219.0M | 0.17% | −1,081,564−13.0% | Reduced |
| State Street Corp | 9,635,912 | $290.2M | 0.01% | +211,666+2.2% | Added |
| Pictet Asset Management Holding SA | 9,644,792 | $290.5M | 0.31% | −1,559,554−13.9% | Reduced |
| Capital International Investors | 11,385,267 | $342.9M | 0.08% | +2,368,690+26.3% | Added |
| Vanguard Capital Management LLC | 11,709,151 | $352.7M | 0.01% | +11,709,151 | New |
| Vanguard Portfolio Management LLC | 12,643,094 | $380.8M | 0.02% | +12,643,094 | New |
| BlackRock, Inc. | 26,790,406 | $806.9M | 0.01% | +1,058,777+4.1% | Added |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −834,712−100.0% | Sold out |
| D. E. Shaw & Co., Inc. | 0 | $0 | 0.00% | −720,789−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −612,982−100.0% | Sold out |
| Erste Asset Management GmbH | 0 | $0 | 0.00% | −418,010−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −227,564−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −189,285−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −156,400−100.0% | Sold out |