Equibles

TTEK

Tetra Tech Inc

Company with tickers: TTEK

CIK
831641
CUSIP
88162G103
Shares Outstanding
259,524,699
Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades
Holders: 574
Total Value: $6,409,079,453
Total Shares: 212,784,855
Showing 1–100 of 586 holdings by value · page 1 of 6

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 574 13F filers · Δ vs Dec 31, 2025
Top Holder
12.6%
+0.9 pts
Top 5
30.4%
+1.4 pts
Top 10
42.8%
+2.2 pts
HHI
312
Broadly held +32

Quarterly Activity

vs Dec 31, 2025
New
555
Increased
8
Decreased
7
Sold Out
586
Unchanged
4
Holder count: -31
Institutional value: -13.1%
Shares held: -3.3%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds
Mega Capital International Investors +2,368,690 11,385,267
Mega GOLDMAN SACHS GROUP INC +372,322 1,926,668
Large Rockefeller Capital Management L.P. +83,869 626,533
Large Candriam S.C.A. +35,170 259,365
Small Sciencast Management LP +28,356 55,578

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds
Mega HSBC HOLDINGS PLC −158,566 430,972
Large Corient Private Wealth LLC −147,470 1,389,823
Mid Horizon Investments, LLC −51,967 3,724
Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC −25,846 39,642
Small ISTHMUS PARTNERS, LLC −12,761 98,876

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD)
Mega BlackRock, Inc. 26,790,406 $806,927,019
Large Pictet Asset Management Holding SA 9,644,792 $290,501,135
Mega STATE STREET CORP 9,635,912 $290,233,669
Mega NEUBERGER BERMAN GROUP LLC 7,269,657 $218,962,068
Large SANDS CAPITAL MANAGEMENT, LLC 6,658,823 $200,563,748

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD)
Mega BlackRock, Inc. 25,731,629 $863,038,828
Large Pictet Asset Management Holding SA 11,204,346 $375,793,764
Mega STATE STREET CORP 9,424,246 $316,089,210
Mega Neuberger Berman Group LLC 8,351,221 $280,099,951
Large SANDS CAPITAL MANAGEMENT, LLC 7,007,004 $235,014,914
100 of 100 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Action
Mega BlackRock, Inc. $806,927,019 12.59% 26,790,406 View
Mega Capital International Investors $342,924,242 5.35% 11,385,267 View
Large Pictet Asset Management Holding SA $290,501,135 4.53% 9,644,792 View
Mega STATE STREET CORP $290,233,669 4.53% 9,635,912 View
Mega NEUBERGER BERMAN GROUP LLC $218,962,068 3.42% 7,269,657 View
Large SANDS CAPITAL MANAGEMENT, LLC $200,563,748 3.13% 6,658,823 View
Mega GEODE CAPITAL MANAGEMENT, LLC $157,149,533 2.45% 5,217,448 View
Mega FIL Ltd $145,560,079 2.27% 4,832,672 View
Mega WELLINGTON MANAGEMENT GROUP LLP $144,697,952 2.26% 4,804,049 View
Mega Amundi $143,047,317 2.23% 4,749,247 View
Large Impax Asset Management Group plc $115,361,828 1.80% 3,830,074 View
Mega DIMENSIONAL FUND ADVISORS LP $114,131,906 1.78% 3,789,240 View
Mid FERNBRIDGE CAPITAL MANAGEMENT LP $102,431,343 1.60% 3,400,775 View
Large FULLER & THALER ASSET MANAGEMENT, INC. $99,831,023 1.56% 3,314,443 View
Mid LGT Group Foundation $95,230,644 1.49% 3,161,708 View
Mega Invesco Ltd. $88,399,185 1.38% 2,934,900 View
Mega ALLIANCEBERNSTEIN L.P. $84,560,845 1.32% 2,807,465 View
Large Ninety One UK Ltd $82,279,436 1.28% 2,731,721 View
Mega FIRST TRUST ADVISORS LP $73,657,917 1.15% 2,445,482 View
Mega Bank of New York Mellon Corp $70,740,939 1.10% 2,348,637 View
Large M&G PLC $69,834,244 1.09% 2,318,534 View
Mid Robeco Schweiz AG $68,891,970 1.07% 2,287,250 View
Mid Van Berkom & Associates Inc. $68,847,934 1.07% 2,285,788 View
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $67,386,180 1.05% 2,237,257 View
Mega AMERIPRISE FINANCIAL INC $60,870,259 0.95% 2,020,925 View
Large AVIVA PLC $58,035,065 0.91% 1,926,795 View
Mega GOLDMAN SACHS GROUP INC $58,031,240 0.91% 1,926,668 View
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $57,790,671 0.90% 1,918,681 View
Large KING LUTHER CAPITAL MANAGEMENT CORP $53,778,205 0.84% 1,785,465 View
Mega CITADEL ADVISORS LLC $52,436,238 0.82% 1,740,911 View
Mega DEUTSCHE BANK AG\ $52,218,921 0.81% 1,733,696 View
Large Allianz Asset Management GmbH $52,108,743 0.81% 1,730,038 View
Large Quantinno Capital Management LP $46,721,421 0.73% 1,551,176 View
Mega AQR CAPITAL MANAGEMENT LLC $45,615,593 0.71% 1,514,462 View
Large BESSEMER GROUP INC $43,131,985 0.67% 1,432,005 View
Large Aberdeen Group plc $42,837,054 0.67% 1,422,213 View
Large Corient Private Wealth LLC $41,861,468 0.65% 1,389,823 View
Mega BANK OF AMERICA CORP /DE/ $41,298,612 0.64% 1,371,136 View
Mid NEUMEIER POMA INVESTMENT COUNSEL LLC $39,273,859 0.61% 1,303,913 View
Mid PGGM Investments $37,766,172 0.59% 1,253,857 View
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $34,585,858 0.54% 1,148,269 View
Mega Capital Research Global Investors $33,205,794 0.52% 1,102,450 View
Mega JANUS HENDERSON GROUP PLC $31,019,171 0.48% 1,029,853 View
Mid L1 Capital International Pty Ltd $28,799,719 0.45% 956,166 View
Mega Nuveen, LLC $28,204,486 0.44% 936,404 View
Mega JPMORGAN CHASE & CO $27,557,024 0.43% 914,908 View
Mega Legal & General Group Plc $27,522,750 0.43% 913,770 View
Small VALUE HOLDINGS MANAGEMENT CO. LLC $27,328,629 0.43% 907,325 View
Small MANAGED ASSET PORTFOLIOS, LLC $26,712,193 0.42% 886,859 View
Mega WELLS FARGO & COMPANY/MN $26,529,573 0.41% 880,796 View
Large NOMURA ASSET MANAGEMENT CO LTD $26,516,954 0.41% 880,377 View
Mega SCHRODER INVESTMENT MANAGEMENT GROUP $26,047,444 0.41% 864,789 View
Mega ROYAL BANK OF CANADA $25,434,651 0.40% 844,444 View
Mid Premier Fund Managers Ltd $24,264,340 0.38% 805,589 View
Large MARSHALL WACE, LLP $21,674,893 0.34% 719,618 View
Mega RHUMBLINE ADVISERS $21,498,662 0.34% 713,767 View
Large Robeco Institutional Asset Management B.V. $21,298,725 0.33% 707,129 View
Mega BNP PARIBAS ARBITRAGE, SA $20,939,544 0.33% 695,204 View
Mid Portman Square Capital LLP $20,647,260 0.32% 685,500 View
Mega UBS Group AG $19,477,729 0.30% 646,671 View
Large Rockefeller Capital Management L.P. $18,871,172 0.29% 626,533 View
Mega Fisher Asset Management, LLC $18,451,572 0.29% 612,602 View
Mid MIROVA $18,425,066 0.29% 611,722 View
Large Zurcher Kantonalbank (Zurich Cantonalbank) $18,152,360 0.28% 602,668 View
Mid TRILLIUM ASSET MANAGEMENT, LLC $18,083,596 0.28% 600,385 View
Large BANK OF NOVA SCOTIA $17,754,354 0.28% 589,454 View
Mega PRICE T ROWE ASSOCIATES INC /MD/ $17,603,995 0.27% 584,462 View
Mega PRINCIPAL FINANCIAL GROUP INC $17,567,549 0.27% 583,252 View
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $16,369,195 0.26% 543,466 View
Large Point72 Asset Management, L.P. $16,333,082 0.25% 542,267 View
Mega California Public Employees Retirement System $15,007,139 0.23% 498,245 View
Mega Swiss National Bank $14,788,920 0.23% 491,000 View
Large Retirement Systems of Alabama $14,445,672 0.23% 479,604 View
Large CI INVESTMENTS INC. $13,911,072 0.22% 461,855 View
Large RENAISSANCE TECHNOLOGIES LLC $13,662,432 0.21% 453,600 View
Small one8zero8, LLC $13,598,336 0.21% 451,472 View
Mega BARCLAYS PLC $13,373,188 0.21% 443,997 View
Mid Sarasin & Partners LLP $13,137,440 0.20% 436,170 View
Large SG Americas Securities, LLC $13,107,471 0.20% 435,175 View
Large Balyasny Asset Management L.P. $13,086,266 0.20% 434,471 View
Mega HSBC HOLDINGS PLC $12,980,876 0.20% 430,972 View
Mega ENVESTNET ASSET MANAGEMENT INC $12,658,592 0.20% 420,272 View
Large Handelsbanken Fonder AB $12,613,503 0.20% 418,775 View
Large Squarepoint Ops LLC $12,570,371 0.20% 417,343 View
Mid Ninety One North America, Inc. $12,444,047 0.19% 413,149 View
Small NICOLA WEALTH MANAGEMENT LTD. $12,379,320 0.19% 411,000 View
Mid iA Global Asset Management Inc. $11,732,071 0.18% 389,511 View
Large Tidal Investments LLC $11,574,694 0.18% 384,286 View
Large SEB Asset Management AB $11,265,482 0.18% 374,020 View
Mid Perpetual Ltd $11,204,790 0.17% 372,005 View
Mid Copeland Capital Management, LLC $11,020,425 0.17% 365,884 View
Small Osprey Private Wealth LLC $10,946,059 0.17% 363,415 View
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $10,717,298 0.17% 355,820 View
Large Connor, Clark & Lunn Investment Management Ltd. $10,514,199 0.16% 349,077 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $10,045,020 0.16% 333,500 View
Large Russell Investments Group, Ltd. $9,937,937 0.16% 329,945 View
Mega FMR LLC $9,886,947 0.15% 328,252 View
Large SEI INVESTMENTS CO $9,496,353 0.15% 315,284 View
Large BAILLIE GIFFORD & CO $9,444,575 0.15% 313,565 View
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $9,379,096 0.15% 311,391 View
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