Tetra TechTTEK
13F holders, Q1 2026 (March 31)592holders −18
64new positions
82sold out
8famous investors
$30.17avg. 13F price*
At the end of Q1 2026, 592 institutions reported holding Tetra Tech Inc. (TTEK) in their 13F filings, down 18 from Q4 2025. 64 opened new positions and 82 sold out. The largest holders were BlackRock, Inc. ($806.9M), Vanguard Portfolio Management LLC ($380.8M) and Vanguard Capital Management LLC ($352.7M). 8 famous investors held it, including Ken Griffin (0.0% of Citadel Advisors's portfolio), Steve Cohen (0.0% of Point72 Asset Management's portfolio) and Ray Dalio (0.0% of Bridgewater Associates's portfolio).
- Company
- Tetra Tech Inc.
- CUSIP
- 88162G103
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 64 | $213.5M |
| Exits | 82 | $126.5M |
All 13F filers, Q4 2025 → Q1 2026: 26,172,389 shares bought and 21,703,744 shares sold, net +4,468,645 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 592 holders
| BlackRock, Inc. | 0.01% | Add +4.1% | 26,790,406 | $806.9M |
| Vanguard Portfolio Management LLC | 0.02% | — | 12,643,094 | $380.8M |
| Vanguard Capital Management LLC | 0.01% | — | 11,709,151 | $352.7M |
| Capital International Investors | 0.08% | Add +26.3% | 11,385,267 | $342.9M |
| Pictet Asset Management Holding SA | 0.31% | Reduce -13.9% | 9,644,792 | $290.5M |
| State Street Corp. | 0.01% | Add +2.3% | 9,635,912 | $290.2M |
| Neuberger Berman Group LLC | 0.17% | Reduce -12.9% | 7,269,657 | $219.0M |
| Sands Capital Management, LLC | 0.79% | Reduce -5.0% | 6,658,823 | $200.6M |
| Geode Capital Management, LLC | 0.01% | Add +2.7% | 5,217,448 | $157.2M |
| FIL Ltd | 0.11% | Add +3.5% | 4,832,672 | $145.6M |
| Wellington Management Group LLP | 0.03% | Add +355.2% | 4,804,049 | $144.7M |
| Amundi | 0.04% | Reduce -6.8% | 4,749,247 | $143.1M |
| Impax Asset Management Group plc | 0.80% | Add +19.4% | 3,830,074 | $115.4M |
| Dimensional Fund Advisors LP | 0.02% | Add +3.1% | 3,789,240 | $114.1M |
| Fernbridge Capital Management LP | 6.56% | Add +10.9% | 3,400,775 | $102.4M |
| Fuller & Thaler Asset Management, Inc. | 0.34% | New | 3,314,443 | $99.8M |
| LGT Group Foundation | 1.16% | Add +3.3% | 3,161,708 | $95.2M |
| Alliancebernstein L.P. | 0.03% | Reduce -8.8% | 2,807,465 | $94.2M |
| Invesco Ltd. | 0.01% | Add +14.2% | 2,934,900 | $88.4M |
| Ninety One UK Ltd | 0.19% | Reduce -2.5% | 2,731,721 | $82.3M |
| First Trust Advisors LP | 0.05% | Add +47.6% | 2,445,482 | $73.7M |
| Bank of New York Mellon Corp | 0.01% | Reduce -0.3% | 2,348,637 | $70.7M |
| Northern Trust Corp. | 0.01% | Reduce -1.3% | 2,320,311 | $69.9M |
| M&G PLC | 0.37% | Reduce -3.6% | 2,318,534 | $69.6M |
| Robeco Schweiz AG | 1.46% | Reduce -2.5% | 2,287,250 | $68.9M |
| Van Berkom & Associates Inc. | 2.24% | Reduce -0.3% | 2,285,788 | $68.8M |
| Morgan Stanley | 0.00% | Reduce -3.5% | 2,239,504 | $67.5M |
| Charles Schwab Investment Management Inc. | 0.01% | Add +3.6% | 2,237,257 | $67.4M |
| Ameriprise Financial Inc. | 0.01% | Reduce -22.7% | 2,020,925 | $60.9M |
| Aviva PLC | 0.10% | Reduce -5.5% | 1,926,795 | $58.0M |
| Goldman Sachs Group Inc. | 0.01% | Add +23.9% | 1,926,668 | $58.0M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.08% | Add +5.1% | 1,918,681 | $57.8M |
| King Luther Capital Management Corp. | 0.23% | Add +12.2% | 1,785,465 | $53.8M |
| Citadel Advisors | 0.04% | Add +3341.0% | 1,740,911 | $52.4M |
| Deutsche Bank AG | 0.02% | Add +25.1% | 1,733,696 | $52.2M |
| Allianz Asset Management GmbH | 0.06% | Add +9.0% | 1,730,038 | $52.1M |
| Vanguard Fiduciary Trust Co. | 0.01% | — | 1,628,344 | $49.0M |
| Quantinno Capital Management LP | 0.08% | Add +2.2% | 1,551,176 | $46.7M |
| AQR Capital Management | 0.02% | Reduce -47.3% | 1,514,462 | $45.4M |
| Bessemer Group Inc. | 0.07% | Add +2.6% | 1,432,005 | $43.1M |
| Aberdeen Group plc | 0.07% | Reduce -5.1% | 1,422,213 | $42.8M |
| Corient Private Wealth LP | 0.06% | Reduce -9.6% | 1,389,823 | $41.8M |
| Bank of America Corp. | 0.00% | Reduce -32.1% | 1,371,136 | $41.3M |
| Neumeier Poma Investment Counsel LLC | 3.24% | Add +15.7% | 1,303,913 | $39.3M |
| PGGM Investments | 0.66% | Reduce -9.2% | 1,253,857 | $37.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.01% | Add +1.4% | 1,148,269 | $34.6M |
| Capital Research Global Investors | 0.01% | Reduce -37.9% | 1,102,450 | $33.2M |
| Janus Henderson Group PLC | 0.01% | Reduce -47.5% | 1,029,853 | $31.0M |
| L1 Capital International Pty Ltd | 1.72% | New | 956,166 | $28.8M |
| Nuveen, LLC | 0.01% | Reduce -23.0% | 936,404 | $28.2M |
| Legal & General Group Plc | 0.01% | Add +138.4% | 913,770 | $27.5M |
| Value Holdings Management Co. LLC | 4.43% | No change | 907,325 | $27.3M |
| JPMorgan Chase & Co. | 0.00% | Reduce -6.6% | 914,908 | $27.2M |
| Managed Asset Portfolios, LLC | 3.20% | Add +4.9% | 886,859 | $26.7M |
| Wells Fargo & Company | 0.01% | Reduce -4.7% | 880,796 | $26.5M |
| Nomura Asset Management Co. Ltd. | 0.07% | Reduce -11.3% | 880,377 | $26.5M |
| Schroder Investment Management Group | 0.02% | Add +34.6% | 864,789 | $25.7M |
| Royal Bank of Canada | 0.00% | Reduce -0.6% | 844,444 | $25.4M |
| Premier Fund Managers Ltd | 1.70% | Reduce -29.1% | 805,589 | $24.0M |
| Marshall Wace, LLP | 0.02% | Add +657.1% | 719,618 | $21.7M |
| Rhumbline Advisers | 0.02% | Add +2.0% | 713,767 | $21.5M |
| Robeco Institutional Asset Management B.V. | 0.03% | Reduce -4.4% | 707,129 | $21.3M |
| BNP Paribas Financial Markets | 0.01% | Reduce -30.6% | 695,204 | $20.9M |
| UBS Group AG | 0.00% | Reduce -2.9% | 646,671 | $19.5M |
| Rockefeller Capital Management L.P. | 0.03% | Add +12.8% | 626,533 | $18.9M |
| Trillium Asset Management, LLC | 0.62% | Add +53.4% | 600,385 | $18.6M |
| Fisher Asset Management | 0.01% | Reduce -1.4% | 612,602 | $18.5M |
| Mirova | 0.75% | Add +126.8% | 611,722 | $18.4M |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.04% | Add +15.2% | 602,668 | $18.2M |
| Bank of Nova Scotia | 0.03% | Reduce -34.6% | 589,454 | $17.8M |
| T. Rowe Price Associates Inc. | 0.00% | Add +41.3% | 584,462 | $17.6M |
| Principal Financial Group Inc. | 0.01% | Add +3.7% | 583,252 | $17.6M |
| Arrowstreet Capital, Limited Partnership | 0.01% | Reduce -46.8% | 543,466 | $16.4M |
| Point72 Asset Management | 0.03% | New | 542,267 | $16.3M |
| California Public Employees Retirement System | 0.01% | Reduce -3.7% | 498,245 | $15.0M |
| Swiss National Bank | 0.01% | Reduce -0.3% | 491,000 | $14.8M |
| Retirement Systems of Alabama | 0.05% | Add +1.3% | 479,604 | $14.4M |
| CI Investments Inc. | 0.07% | Reduce -1.1% | 461,855 | $13.9M |
| Renaissance Technologies | 0.02% | Reduce -10.8% | 453,600 | $13.7M |
| one8zero8, LLC | 3.03% | Reduce -1.9% | 451,472 | $13.6M |
| Barclays PLC | 0.00% | Add +9.0% | 443,997 | $13.4M |
| Sarasin & Partners LLP | 0.16% | Add +6.1% | 436,170 | $13.1M |
| SG Americas Securities, LLC | 0.01% | Add +64.5% | 435,175 | $13.1M |
| Balyasny Asset Management L.P. | 0.03% | New | 434,471 | $13.1M |
| Winslow Asset Management Inc. | 2.53% | Reduce -2.0% | 432,538 | $13.0M |
| HSBC Holdings PLC | 0.01% | Reduce -26.9% | 430,972 | $13.0M |
| Envestnet Asset Management Inc. | 0.00% | Reduce -25.9% | 420,272 | $12.7M |
| Handelsbanken Fonder AB | 0.04% | Reduce -18.9% | 418,775 | $12.6M |
| Squarepoint Ops LLC | 0.03% | Add +506.1% | 417,343 | $12.6M |
| Ninety One North America, Inc. | 0.56% | Reduce -0.6% | 413,149 | $12.4M |
| Nicola Wealth Management LTD. | 1.49% | Add +12.6% | 411,000 | $12.4M |
| iA Global Asset Management Inc. | 0.17% | Reduce -45.7% | 389,511 | $11.7M |
| Tidal Investments LLC | 0.04% | Add +18.9% | 384,286 | $11.6M |
| SEB Asset Management AB | 0.05% | — | 374,020 | $11.3M |
| Perpetual Ltd | 0.17% | Add +14.9% | 372,005 | $11.2M |
| Copeland Capital Management, LLC | 0.25% | Reduce -78.0% | 365,884 | $11.0M |
| Osprey Private Wealth LLC | 3.17% | Add +5.6% | 363,415 | $10.9M |
| Voloridge Investment Management, LLC | 0.04% | Reduce -10.5% | 355,820 | $10.7M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.02% | Reduce -39.6% | 349,077 | $10.5M |
| Van Eck Associates Corp. | 0.01% | Add +4.7% | 346,973 | $10.5M |
"% of holder's portfolio" is TTEK's weight in each manager's 13F, not the share of Tetra Tech Inc. the manager owns.