TTEK Tetra Tech, Inc.
Tetra Tech, Inc. (TTEK) Institutional Ownership
What the institutions did with TTEK last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 28.7M | 11.0% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 12.5M | 4.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 11.7M | 4.5% |
| Capital International Investors | 11.7M | 4.5% |
| STATE STREET CORP | 9.8M | 3.7% |
| FMR LLC | 8.8M | 3.4% |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 8.4M | 3.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 6.8M | 2.6% |
| FIL Ltd | 5.5M | 2.1% |
| Amundi | 5.1M | 2.0% |
| FULLER & THALER ASSET MANAGEMENT, INC. | 4.9M | 1.9% |
| Pictet Asset Management Holding SA | 4.8M | 1.8% |
| WELLINGTON MANAGEMENT GROUP LLP | 4.7M | 1.8% |
| DIMENSIONAL FUND ADVISORS LP | 4.4M | 1.7% |
| NEUBERGER BERMAN GROUP LLC | 4.4M | 1.7% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 4.4M | 1.7% |
| Invesco Ltd. | 4.1M | 1.6% |
| AQR CAPITAL MANAGEMENT LLC | 4.1M | 1.6% |
| Impax Asset Management Group plc | 3.9M | 1.5% |
| LGT Group Foundation | 3.7M | 1.4% |
| NORGES BANK | 3.2M | 1.2% |
| Robeco Schweiz AG | 3.1M | 1.2% |
| M&G PLC | 2.8M | 1.1% |
| AMERIPRISE FINANCIAL INC | 2.7M | 1.0% |
| GOLDMAN SACHS GROUP INC | 2.6M | 1.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Increased | 328.3K | 8.8M | +8.4M |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 290.5K | 8.4M | +8.1M |
| SANDS CAPITAL MANAGEMENT, LLC | Sold Out | 6.7M | 0 | -6.7M |
| Pictet Asset Management Holding SA | Reduced | 9.6M | 4.8M | -4.9M |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 543.5K | 4.4M | +3.9M |
| FERNBRIDGE CAPITAL MANAGEMENT LP | Sold Out | 3.4M | 0 | -3.4M |
| NEUBERGER BERMAN GROUP LLC | Reduced | 7.3M | 4.4M | -2.9M |
| AQR CAPITAL MANAGEMENT LLC | Increased | 1.5M | 4.1M | +2.6M |
| ALLIANCEBERNSTEIN L.P. | Reduced | 2.8M | 335.4K | -2.5M |
| Energy Income Partners, LLC | New | 0 | 2.4M | +2.4M |
| Van Berkom & Associates Inc. | Reduced | 4.6M | 2.5M | -2.1M |
| BlackRock, Inc. | Increased | 26.8M | 28.7M | +1.9M |
| COOKE & BIELER LP | New | 0 | 1.8M | +1.8M |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 5.2M | 6.8M | +1.6M |
| FULLER & THALER ASSET MANAGEMENT, INC. | Increased | 3.3M | 4.9M | +1.6M |
| BESSEMER GROUP INC | Reduced | 1.4M | 102.1K | -1.3M |
| UBS Group AG | Increased | 646.7K | 1.9M | +1.2M |
| KING LUTHER CAPITAL MANAGEMENT CORP | Reduced | 1.8M | 569.2K | -1.2M |
| Invesco Ltd. | Increased | 2.9M | 4.1M | +1.2M |
| Pacer Advisors, Inc. | Increased | 72.0K | 910.2K | +838.2K |
| Robeco Schweiz AG | Increased | 2.3M | 3.1M | +812.0K |
| GOLDMAN SACHS GROUP INC | Increased | 1.9M | 2.6M | +721.2K |
| AMERIPRISE FINANCIAL INC | Increased | 2.0M | 2.7M | +708.8K |
| MARSHALL WACE, LLP | Reduced | 719.6K | 35.1K | -684.5K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 3.8M | 4.4M | +657.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.