TTEK Institutional Ownership & Shareholders
TETRA TECH INC (TTEK) is currently held by 553 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $7.33B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of TTEK tracked by InsiderSet, reporting ownership valued at approximately $828.43M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.11B, representing an estimated gain of +33.78% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 43% of the total disclosed TTEK value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in TETRA TECH INC (TTEK).
This page ranks the largest institutional TTEK shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
553
Total Reported Value
$7.33B
Largest Holder
Blackrock, Inc.
Largest Position
$828.43M
Insider Transactions (90d)
1
Latest Filing Quarter
Q2 2026
New Institutional Positions
36
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 28,675,276 | $828,428,737 | $1,108,299,417 | +$279,870,680 | +33.78% | |
| Vanguard Portfolio Management Llc | 0.02% | 12,467,970 | $360,199,653 | $481,887,041 | +$121,687,388 | +33.78% | |
| Vanguard Capital Management Llc | 0.01% | 11,725,738 | $338,756,571 | $453,199,774 | +$114,443,203 | +33.78% | |
| Capital International Investors | 0.07% | 11,651,238 | $336,604,266 | $450,320,349 | +$113,716,083 | +33.78% | |
| State Street Corp | 0.01% | 9,761,640 | $282,013,780 | $377,287,386 | +$95,273,606 | +33.78% | |
| Neuberger Berman Group Llc | 0.21% | 8,351,221 | $280,099,964 | $322,774,692 | +$42,674,728 | +15.24% | |
| Fmr Llc | 0.01% | 8,768,611 | $253,325,176 | $338,906,815 | +$85,581,639 | +33.78% | |
| Geode Capital Management, Llc | 0.01% | 6,833,071 | $197,443,512 | $264,098,194 | +$66,654,682 | +33.76% | |
| Fil Ltd | 0.11% | 5,471,691 | $158,077,153 | $211,480,857 | +$53,403,704 | +33.78% | |
| Fuller & Thaler Asset Management, Inc. | 0.39% | 4,921,268 | $142,175,418 | $190,207,008 | +$48,031,590 | +33.78% | |
| Pictet Asset Management Holding Sa | 0.13% | 4,759,290 | $137,495,637 | $183,946,559 | +$46,450,922 | +33.78% | |
| Wellington Management Group Llp | 0.02% | 4,674,089 | $135,034,432 | $180,653,540 | +$45,619,108 | +33.78% | |
| Dimensional Fund Advisors Lp | 0.02% | 4,446,215 | $128,452,355 | $171,846,210 | +$43,393,855 | +33.78% | |
| Arrowstreet Capital, Limited Partnership | 0.06% | 4,393,728 | $126,934,802 | $169,817,587 | +$42,882,785 | +33.78% | |
| Invesco Ltd. | 0.01% | 4,116,893 | $118,937,050 | $159,117,914 | +$40,180,864 | +33.78% | |
| Aqr Capital Management Llc | 0.04% | 4,111,603 | $117,098,452 | $158,913,456 | +$41,815,004 | +35.71% | |
| Impax Asset Management Group Plc | 0.74% | 3,931,741 | $113,587,997 | $151,961,790 | +$38,373,793 | +33.78% | |
| Lgt Group Foundation | 1.22% | 3,745,171 | $108,197,991 | $144,750,859 | +$36,552,868 | +33.78% | |
| Norges Bank | 0.01% | 3,230,988 | $93,343,243 | $124,877,686 | +$31,534,443 | +33.78% | |
| M&G Plc | 0.40% | 2,776,344 | $80,513,976 | $107,305,696 | +$26,791,720 | +33.28% | |
| Ameriprise Financial Inc | 0.02% | 2,729,762 | $78,862,813 | $105,505,301 | +$26,642,488 | +33.78% | |
| Goldman Sachs Group Inc | 0.01% | 2,647,910 | $76,498,121 | $102,341,722 | +$25,843,601 | +33.78% | |
| Robeco Schweiz Ag | 1.38% | 2,321,543 | $76,494,842 | $89,727,637 | +$13,232,795 | +17.30% | |
| First Trust Advisors Lp | 0.04% | 2,561,572 | $74,003,648 | $99,004,758 | +$25,001,110 | +33.78% | |
| Van Berkom & Associates Inc. | 2.30% | 2,469,392 | $71,341,000 | $95,442,001 | +$24,101,001 | +33.78% | |
| Energy Income Partners, Llc | 1.08% | 2,371,465 | $68,511,624 | $91,657,122 | +$23,145,498 | +33.78% | |
| Ninety One Uk Ltd | 0.15% | 2,365,261 | $68,332,375 | $91,417,338 | +$23,084,963 | +33.78% | |
| Charles Schwab Investment Management Inc | 0.01% | 2,286,390 | $66,053,807 | $88,368,974 | +$22,315,167 | +33.78% | |
| Northern Trust Corp | 0.01% | 2,245,716 | $64,878,735 | $86,796,923 | +$21,918,188 | +33.78% | |
| Bank Of New York Mellon Corp | 0.01% | 2,101,030 | $60,698,767 | $81,204,810 | +$20,506,043 | +33.78% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.07% | 2,081,631 | $60,138,290 | $80,455,038 | +$20,316,748 | +33.78% | |
| Bank Of America Corp | 0.00% | 1,977,679 | $57,135,156 | $76,437,293 | +$19,302,137 | +33.78% | |
| Allianz Asset Management Gmbh | 0.05% | 1,976,969 | $57,114,635 | $76,409,852 | +$19,295,217 | +33.78% | |
| Morgan Stanley | 0.00% | 1,966,257 | $56,805,183 | $75,995,833 | +$19,190,650 | +33.78% | |
| Pggm Investments | 1.33% | 1,874,895 | $54,166,000 | $72,464,692 | +$18,298,692 | +33.78% | |
| Ubs Group Ag | 0.01% | 1,867,963 | $53,965,451 | $72,196,770 | +$18,231,319 | +33.78% | |
| Aviva Plc | 0.08% | 1,842,517 | $53,230,316 | $71,213,282 | +$17,982,966 | +33.78% | |
| Vanguard Fiduciary Trust Co | 0.01% | 1,643,323 | $47,475,601 | $63,514,434 | +$16,038,833 | +33.78% | |
| Deutsche Bank Ag\ | 0.01% | 1,558,916 | $45,037,083 | $60,252,103 | +$15,215,020 | +33.78% | |
| Corient Private Wealth Llc | 0.06% | 1,554,196 | $44,900,725 | $60,069,675 | +$15,168,950 | +33.78% | |
| Cooke & Bieler Lp | 0.70% | 1,353,243 | $44,589,357 | $52,302,842 | +$7,713,485 | +17.30% | |
| Neumeier Poma Investment Counsel Llc | 3.00% | 1,514,378 | $43,750,380 | $58,530,710 | +$14,780,330 | +33.78% | |
| Managed Asset Portfolios, Llc | 4.36% | 1,321,714 | $38,184,324 | $51,084,246 | +$12,899,922 | +33.78% | |
| Citadel Advisors Llc | 0.02% | 1,287,534 | $37,196,858 | $49,763,189 | +$12,566,331 | +33.78% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.01% | 1,148,269 | $34,585,862 | $44,380,597 | +$9,794,735 | +28.32% | |
| Jpmorgan Chase & Co | 0.00% | 1,136,843 | $33,148,904 | $43,938,982 | +$10,790,078 | +32.55% | |
| Quantinno Capital Management Lp | 0.04% | 1,103,758 | $31,887,580 | $42,660,247 | +$10,772,667 | +33.78% | |
| Janus Henderson Group Plc | 0.02% | 1,029,853 | $31,024,292 | $39,803,818 | +$8,779,526 | +28.30% | |
| Aberdeen Group Plc | 0.04% | 1,068,968 | $30,882,485 | $41,315,613 | +$10,433,128 | +33.78% | |
| Capital Research Global Investors | 0.00% | 1,020,653 | $29,486,665 | $39,448,238 | +$9,961,573 | +33.78% |
Frequently asked questions about TTEK
Who are the largest institutional holders of TTEK?
The largest institutional holders of TTEK reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Portfolio Management Llc, Vanguard Capital Management Llc, Capital International Investors, and State Street Corp. InsiderSet ranks institutional holders by their latest reported TTEK position.
What is TTEK institutional ownership?
This page tracks TTEK positions reported by institutional investment managers through SEC Form 13F. TETRA TECH INC (TTEK) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own TTEK?
InsiderSet currently tracks 553 institutional managers reporting TTEK holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of TTEK shareholders.
How much TTEK stock do institutions own?
Institutional investment managers disclosed approximately $7.33B in TTEK holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was TTEK institutional ownership last updated?
The latest TTEK institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional TTEK holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its TTEK position after the reporting date.
Are institutions buying or selling TTEK?
Institutional buying and selling can be analyzed by comparing TTEK positions across consecutive 13F reporting periods. InsiderSet's TTEK Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View TTEK ownership changes.
How has TTEK institutional ownership changed over time?
InsiderSet tracks TTEK institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.