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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 26,790,406 | $806.9M | 0.01% | +1,058,777+4.1% | Added |
| Vanguard Portfolio Management LLC | 12,643,094 | $380.8M | 0.02% | +12,643,094 | New |
| Vanguard Capital Management LLC | 11,709,151 | $352.7M | 0.01% | +11,709,151 | New |
| Capital International Investors | 11,385,267 | $342.9M | 0.08% | +2,368,690+26.3% | Added |
| Pictet Asset Management Holding SA | 9,644,792 | $290.5M | 0.31% | −1,559,554−13.9% | Reduced |
| State Street Corp | 9,635,912 | $290.2M | 0.01% | +211,666+2.2% | Added |
| Neuberger Berman Group LLC | 7,269,657 | $219.0M | 0.17% | −1,081,564−13.0% | Reduced |
| Sands Capital Management, LLC | 6,658,823 | $200.6M | 0.79% | −348,181−5.0% | Reduced |
| Geode Capital Management, LLC | 5,217,448 | $157.2M | 0.01% | +135,106+2.7% | Added |
| FIL Ltd | 4,832,672 | $145.6M | 0.11% | +164,714+3.5% | Added |
| Wellington Management Group LLP | 4,804,049 | $144.7M | 0.03% | +3,748,775+355.2% | Added |
| Amundi | 4,749,247 | $143.1M | 0.04% | −346,550−6.8% | Reduced |
| Impax Asset Management Group plc | 3,830,074 | $115.4M | 0.80% | +621,884+19.4% | Added |
| Dimensional Fund Advisors LP | 3,789,240 | $114.1M | 0.02% | +112,560+3.1% | Added |
| Fernbridge Capital Management LP | 3,400,775 | $102.4M | 6.56% | +333,934+10.9% | Added |
| Fuller & Thaler Asset Management, Inc. | 3,314,443 | $99.8M | 0.34% | +3,314,443 | New |
| LGT Group Foundation | 3,161,708 | $95.2M | 1.16% | +100,419+3.3% | Added |
| Alliancebernstein L.P. | 2,807,465 | $94.2M | 0.03% | −271,534−8.8% | Reduced |
| Invesco Ltd. | 2,934,900 | $88.4M | 0.01% | +364,793+14.2% | Added |
| Ninety One UK Ltd | 2,731,721 | $82.3M | 0.19% | −71,270−2.5% | Reduced |
| First Trust Advisors LP | 2,445,482 | $73.7M | 0.05% | +788,491+47.6% | Added |
| Bank of New York Mellon Corp | 2,348,637 | $70.7M | 0.01% | −7,911−0.3% | Reduced |
| Northern Trust Corp | 2,320,311 | $69.9M | 0.01% | −30,612−1.3% | Reduced |
| M&G Plc | 2,318,534 | $69.6M | 0.36% | −87,052−3.6% | Reduced |
| Robeco Schweiz AG | 2,287,250 | $68.9M | 1.46% | −59,854−2.6% | Reduced |
| Van Berkom & Associates Inc. | 2,285,788 | $68.8M | 2.24% | −6,807−0.3% | Reduced |
| Morgan Stanley | 2,239,504 | $67.5M | 0.00% | −81,236−3.5% | Reduced |
| Charles Schwab Investment Management Inc | 2,237,257 | $67.4M | 0.01% | +78,267+3.6% | Added |
| Ameriprise Financial Inc | 2,020,925 | $60.9M | 0.01% | −592,702−22.7% | Reduced |
| Aviva PLC | 1,926,795 | $58.0M | 0.10% | −112,469−5.5% | Reduced |
| Goldman Sachs Group Inc | 1,926,668 | $58.0M | 0.01% | +372,322+24.0% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 1,918,681 | $57.8M | 0.08% | +92,614+5.1% | Added |
| King Luther Capital Management Corp | 1,785,465 | $53.8M | 0.23% | +194,549+12.2% | Added |
| Citadel Advisors LLC | 1,740,911 | $52.4M | 0.04% | +1,690,318+3,341.0% | Added |
| Deutsche Bank AG | 1,733,696 | $52.2M | 0.02% | +347,889+25.1% | Added |
| Allianz Asset Management GmbH | 1,730,038 | $52.1M | 0.06% | +143,152+9.0% | Added |
| Vanguard Fiduciary Trust Co | 1,628,344 | $49.0M | 0.01% | +1,628,344 | New |
| Quantinno Capital Management LP | 1,551,176 | $46.7M | 0.08% | +33,162+2.2% | Added |
| AQR Capital Management LLC | 1,514,462 | $45.4M | 0.02% | −1,360,910−47.3% | Reduced |
| Bessemer Group Inc | 1,432,005 | $43.1M | 0.07% | +36,966+2.6% | Added |
| Standard Life Aberdeen plc | 1,422,213 | $42.8M | 0.07% | −77,124−5.1% | Reduced |
| CI Private Wealth, LLC | 1,389,823 | $41.8M | 0.06% | −147,470−9.6% | Reduced |
| Bank of America Corp | 1,371,136 | $41.3M | 0.00% | −648,575−32.1% | Reduced |
| Neumeier Poma Investment Counsel LLC | 1,303,913 | $39.3M | 3.24% | +177,310+15.7% | Added |
| PGGM Investments | 1,253,857 | $37.8M | 0.66% | −127,160−9.2% | Reduced |
| UBS Asset Management Americas Inc | 1,148,269 | $34.6M | 0.01% | +15,318+1.4% | Added |
| Capital Research Global Investors | 1,102,450 | $33.2M | 0.01% | −673,316−37.9% | Reduced |
| Janus Henderson Group PLC | 1,029,853 | $31.0M | 0.01% | −931,437−47.5% | Reduced |
| L1 Capital International Pty Ltd | 956,166 | $28.8M | 1.72% | +956,166 | New |
| Nuveen, LLC | 936,404 | $28.2M | 0.01% | −279,924−23.0% | Reduced |
| Legal & General Group Plc | 913,770 | $27.5M | 0.01% | +530,550+138.4% | Added |
| Value Holdings Management Co. LLC | 907,325 | $27.3M | 4.43% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 914,908 | $27.2M | 0.00% | −65,057−6.6% | Reduced |
| Managed Asset Portfolios, LLC | 886,859 | $26.7M | 3.20% | +41,579+4.9% | Added |
| Wells Fargo & Company | 880,796 | $26.5M | 0.01% | −43,423−4.7% | Reduced |
| Nomura Asset Management Co Ltd | 880,377 | $26.5M | 0.07% | −112,256−11.3% | Reduced |
| Schroder Investment Management Group | 864,789 | $25.7M | 0.02% | +222,338+34.6% | Added |
| Royal Bank of Canada | 844,444 | $25.4M | 0.00% | −4,885−0.6% | Reduced |
| Premier Fund Managers Ltd | 805,589 | $24.0M | 1.70% | −330,546−29.1% | Reduced |
| Marshall Wace, LLP | 719,618 | $21.7M | 0.02% | +624,564+657.1% | Added |
| Rhumbline Advisers | 713,767 | $21.5M | 0.02% | +14,302+2.0% | Added |
| Robeco Institutional Asset Management B.V. | 707,129 | $21.3M | 0.03% | −32,775−4.4% | Reduced |
| BNP Paribas Arbitrage, SA | 695,204 | $20.9M | 0.01% | −306,872−30.6% | Reduced |
| UBS Group AG | 646,671 | $19.5M | 0.00% | −19,067−2.9% | Reduced |
| Rockefeller Capital Management L.P. | 626,533 | $18.9M | 0.03% | +71,081+12.8% | Added |
| Trillium Asset Management, LLC | 600,385 | $18.6M | 0.62% | +209,056+53.4% | Added |
| Fisher Asset Management, LLC | 612,602 | $18.5M | 0.01% | −8,596−1.4% | Reduced |
| Mirova | 611,722 | $18.4M | 0.75% | +342,025+126.8% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 602,668 | $18.2M | 0.04% | +79,469+15.2% | Added |
| Bank of Nova Scotia | 589,454 | $17.8M | 0.03% | −311,851−34.6% | Reduced |
| Price T Rowe Associates Inc | 584,462 | $17.6M | 0.00% | +170,939+41.3% | Added |
| Principal Financial Group Inc | 583,252 | $17.6M | 0.01% | +20,951+3.7% | Added |
| Arrowstreet Capital, Limited Partnership | 543,466 | $16.4M | 0.01% | −478,786−46.8% | Reduced |
| Point72 Asset Management, L.P. | 542,267 | $16.3M | 0.03% | +542,267 | New |
| California Public Employees Retirement System | 498,245 | $15.0M | 0.01% | −19,123−3.7% | Reduced |
| Swiss National Bank | 491,000 | $14.8M | 0.01% | −1,300−0.3% | Reduced |
| Retirement Systems of Alabama | 479,604 | $14.4M | 0.05% | +5,994+1.3% | Added |
| Ci Investments Inc. | 461,855 | $13.9M | 0.07% | −5,272−1.1% | Reduced |
| Renaissance Technologies LLC | 453,600 | $13.7M | 0.02% | −55,100−10.8% | Reduced |
| one8zero8, LLC | 451,472 | $13.6M | 3.03% | −8,974−1.9% | Reduced |
| Barclays PLC | 443,997 | $13.4M | 0.00% | +36,499+9.0% | Added |
| Sarasin & Partners LLP | 436,170 | $13.1M | 0.16% | +25,108+6.1% | Added |
| SG Americas Securities, LLC | 435,175 | $13.1M | 0.01% | +170,695+64.5% | Added |
| Balyasny Asset Management LLC | 434,471 | $13.1M | 0.03% | +434,471 | New |
| Winslow Asset Management Inc | 432,538 | $13.0M | 2.53% | −9,062−2.1% | Reduced |
| HSBC Holdings PLC | 430,972 | $13.0M | 0.01% | −158,566−26.9% | Reduced |
| Envestnet Asset Management Inc | 420,272 | $12.7M | 0.00% | −146,529−25.9% | Reduced |
| Handelsbanken Fonder AB | 418,775 | $12.6M | 0.04% | −97,268−18.8% | Reduced |
| Squarepoint Ops LLC | 417,343 | $12.6M | 0.03% | +348,487+506.1% | Added |
| Ninety One North America, Inc. | 413,149 | $12.4M | 0.56% | −2,386−0.6% | Reduced |
| Nicola Wealth Management Ltd. | 411,000 | $12.4M | 1.49% | +46,000+12.6% | Added |
| iA Global Asset Management Inc. | 389,511 | $11.7M | 0.17% | −328,168−45.7% | Reduced |
| Toroso Investments, LLC | 384,286 | $11.6M | 0.04% | +60,940+18.8% | Added |
| SEB Asset Management AB | 374,020 | $11.3M | 0.05% | +374,020 | New |
| Perpetual Ltd | 372,005 | $11.2M | 0.17% | +48,351+14.9% | Added |
| Copeland Capital Management, LLC | 365,884 | $11.0M | 0.25% | −1,297,206−78.0% | Reduced |
| Osprey Private Wealth LLC | 363,415 | $10.9M | 3.17% | +19,390+5.6% | Added |
| Voloridge Investment Management, LLC | 355,820 | $10.7M | 0.04% | −41,680−10.5% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 349,077 | $10.5M | 0.02% | −229,379−39.7% | Reduced |
| Van Eck Associates Corp | 346,973 | $10.5M | 0.01% | +15,618+4.7% | Added |