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Disclosery

TTEK TETRA TECH INC NEW

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COM (common), issuer CIK 831641

575 managers (593 13F filers) reported a position in TTEK shares at 2026-03-31, 243,536,571 shares in all. 64 filers opened a position and 85 filers sold out during the quarter.

Managers
575
13F filers
593
New
64
Added
201
Reduced
230
Sold out
85
Shares held by filers
243,536,571

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Relyea Zuckerberg Hanson LLC70,468$2.12M0.21%-12,18813F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC70,195$2.11M0.05%new13F-HRTimeline
DZ BANK AG Deutsche Zentral Genossensch…in group DZ BANK AG Deutsche Zentral G…69,265$2.09M<0.01%013F-HRTimelineGroup
Engineers Gate Manager LP69,161$2.08M0.03%+97513F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM68,151$2.05M0.01%-1,19313F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…66,850$2.01M0.06%013F-HRTimelineGroup
D'Orazio & Associates, Inc.65,356$1.97M0.25%-3913F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…65,347$1.97M0.01%-7113F-HRTimeline
KLP KAPITALFORVALTNING AS64,200$1.93M0.01%+1,50013F-HRTimeline
Schonfeld Strategic Advisors LLC63,778$1.92M0.02%+54,09213F-HRTimeline
Penobscot Investment Management Company…63,030$1.9M0.15%-5,96513F-HRTimeline
STATE OF MICHIGAN RETIREMENT SYSTEM62,740$1.89M0.01%+1,00013F-HRTimeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…62,123$1.87M<0.01%+2,78613F-HRTimelineGroup
Summit Trail Advisors, LLC61,701$1.86M0.03%+8,91613F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources61,542$1.85M<0.01%-5,81413F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC60,095$1.81M<0.01%-100,13413F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC58,740$1.77M<0.01%+38,18713F-HRTimelineGroup
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …58,506$1.75M<0.01%+17,58513F-HRTimelineGroup
New Age Alpha Advisors, LLC57,604$1.74M0.08%-1,26413F-HRTimeline
Daiwa Securities Group Inc.in group Daiwa Securities Group Inc.56,800$1.71M<0.01%-5,80013F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS55,627$1.68M<0.01%-11,45213F-HRTimeline
Sciencast Management LP55,578$1.67M0.21%+28,35613F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC54,966$1.65M<0.01%+19,76013F-HRTimelineGroup
NEW MEXICO EDUCATIONAL RETIREMENT BOARD54,500$1.64M0.05%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC53,606$1.61M<0.01%-168,43313F-HRTimelineGroup
OREGON PUBLIC EMPLOYEES RETIREMENT FUND53,525$1.61M0.02%+1,60013F-HRTimeline
Vest Financial, LLC52,889$1.59M0.02%new13F-HRTimeline
Freestone Grove Partners LP51,353$1.55M0.01%new13F-HRTimeline
Focus Partners Wealthgroup of 2 filers holding50,026$1.53M-31,285Timeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP48,953$1.47M<0.01%-52,77413F-HRTimelineGroup
EXCHANGE TRADED CONCEPTS, LLC48,928$1.47M0.01%-11,82213F-HRTimeline
Bridgefront Capital, LLC48,471$1.46M0.36%-15,40713F-HRTimeline
WCM INVESTMENT MANAGEMENT, LLC48,665$1.45M<0.01%+1,39913F-HRTimeline
ZIONS BANCORPORATION, NATIONAL ASSOCIAT…48,059$1.45M0.09%-27,98313F-HRTimeline
Skandinaviska Enskilda Banken AB (publ)47,644$1.43M0.03%-258,46913F-HRTimeline
South Dakota Investment Council47,072$1.42M0.03%013F-HRTimeline
CenterBook Partners LP46,039$1.39M0.07%-57,73513F-HRTimeline
XPONANCE LLC44,932$1.35M0.01%+10,89213F-HRTimeline
Northwest & Ethical Investments L.P.44,382$1.34M0.03%+1,31413F-HRTimeline
Radnor Capital Management, LLC44,220$1.33M0.2%+4,20013F-HRTimeline
Kestra Advisory Services, LLCgroup of 2 filers holding44,143$1.33M+36,748Timeline
TEACHER RETIREMENT SYSTEM OF TEXAS43,811$1.32M0.01%+3,86113F-HRTimeline
Aquatic Capital Management LLC42,307$1.27M0.04%-21,32713F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC41,659$1.25M<0.01%+2,31813F-HRTimeline
IQ EQ FUND MANAGEMENT (IRELAND) Ltd41,487$1.25M0.09%+8213F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…39,642$1.23M<0.01%-25,84613F-HRTimeline
VIRGINIA RETIREMENT SYSTEMS ET Al40,870$1.23M0.01%+20013F-HRTimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC40,571$1.22M0.01%+7,78013F-HRTimelineGroup
HUNTER ASSOCIATES INVESTMENT MANAGEMENT…40,194$1.21M0.16%+6,78513F-HRTimeline
O'SHAUGHNESSY ASSET MANAGEMENT, LLC39,652$1.19M0.01%+5,59313F-HRTimeline
Advisory Services Network, LLC39,117$1.18M0.02%+31,58013F-HRTimeline
FORMULA GROWTH LTD39,050$1.18M0.53%013F-HRTimeline
Cetera Investment Advisers37,458$1.13M<0.01%-13,80113F-HRTimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC35,218$1.06M<0.01%-81,37913F-HRTimelineGroup
Atria Investments, Inc33,935$1.02M0.01%-8,43913F-HRTimeline
Hillsdale Investment Management Inc.33,350$1M0.03%+5,85013F-HRTimeline
Legacy Wealth Asset Management, LLC33,060$996K0.24%+3,67513F-HRTimeline
Tributary Capital Management, LLC32,599$982K0.1%+36413F-HRTimeline
SYON CAPITAL LLC32,506$979K0.05%-5,45713F-HRTimeline
TWINBEECH CAPITAL LP32,500$979K0.1%-168,00013F-HRTimeline
Caprock Group, LLC31,293$943K0.02%+1,62813F-HRTimeline
Vancity Investment Management Ltd31,226$941K0.15%-4,37713F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.31,188$939K<0.01%-29713F-HRTimelineGroup
Orion Porfolio Solutions, LLC31,138$938K0.01%-27,05913F-HRTimeline
New York Life Investment Management LLCin group New York Life Investment Mana…31,077$936K0.01%+7,56813F-HRTimelineGroup
PFG Investments, LLC31,058$935K0.04%new13F-HRTimeline
D.A. DAVIDSON & CO.29,980$903K0.01%-36513F-HRTimeline
Quantbot Technologies LP29,413$886K0.04%+26,11313F-HRTimeline
ODDO BHF ASSET MANAGEMENT SAS29,384$885K0.03%-9,00013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Regal Investment Advisors LLC29,250$881K0.05%+10,11913F-HRTimeline
EQUITABLE TRUST CO27,886$840K0.04%-44613F-HRTimeline
Inscription Capital, LLC27,426$826K0.09%+2,84413F-HRTimeline
Ridge Creek Global, Inc27,055$815K0.69%-11013F-HRTimeline
ALLSTATE CORPin group ALLSTATE CORP26,760$806K0.01%new13F-HRTimelineGroup
SEGALL BRYANT & HAMILL, LLC26,387$795K0.01%-11113F-HR/ATimeline
State of Alaska, Department of Revenue26,102$786K0.01%+15513F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…25,946$781K<0.01%013F-HRTimeline
CAPITAL GROUP INVESTMENT MANAGEMENT PTE…in group CAPITAL GROUP INVESTMENT MANA…25,906$780K0.13%013F-HRTimelineGroup
Lazard Freres Gestion S.A.S.25,830$777K0.02%013F-HRTimeline
WINTON GROUP Ltdin group WINTON GROUP Ltd24,900$750K0.03%+6,00013F-HRTimelineGroup
QUADRANT CAPITAL GROUP LLC24,611$741K0.02%-1,18013F-HR/ATimeline
AXQ CAPITAL, LP24,442$736K0.09%+7,34813F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC24,206$729K0.01%+16,78713F-HRTimelineGroup
BAILARD, INC.24,200$729K0.02%013F-HRTimeline
Baird Financial Group, Inc.in group Baird Financial Group, Inc.23,909$720K<0.01%+3,81013F-HRTimelineGroup
Perigon Wealth Management, LLC23,838$718K0.01%-5,56213F-HRTimeline
IMC-Chicago, LLC23,740$715K0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…23,652$712K<0.01%+15313F-HRTimelineGroup
HARBOUR INVESTMENTS, INC.23,482$707K0.01%+713F-HRTimeline
Numerai GP LLC23,123$696K0.07%-29,80713F-HRTimeline
U.S. Capital Wealth Advisors, LLC22,477$677K0.02%+74613F-HRTimeline
M&T Bank Corpin group M&T Bank Corp22,418$675K<0.01%-99313F-HR/ATimelineGroup
EVERGREEN CAPITAL MANAGEMENT LLC22,248$670K0.01%+5,44413F-HRTimeline
TWO SIGMA SECURITIES, LLC21,589$650K0.08%new13F-HRTimeline
NATURAL INVESTMENTS, LLC21,591$650K0.16%new13F-HRTimeline
FIRST WILSHIRE SECURITIES MANAGEMENT INC21,500$648K0.15%013F-HRTimeline
CWM, LLCin group CWM, LLC20,968$632K<0.01%-29,69013F-HRTimelineGroup
EVEXIA WEALTH LLC20,115$624K0.17%+61813F-HRTimeline
Arkadios Wealth Advisors20,603$621K0.01%-62313F-HRTimeline
State of Wyoming20,542$619K0.07%+2,08513F-HRTimeline
Qtron Investments LLC20,319$612K0.08%new13F-HRTimeline
Graham Capital Management, L.P.20,091$605K0.02%+9,15213F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.19,944$601K<0.01%+7,41913F-HRTimelineGroup
Cullen Capital Management, LLC19,837$597K0.01%+5,40413F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC19,681$593K<0.01%-80513F-HRTimeline
COLDSTREAM CAPITAL MANAGEMENT INC19,552$589K0.01%-5,61713F-HRTimeline
Chicago Partners Investment Group LLC18,411$579K0.01%-1,09513F-HRTimeline
SECURIAN ASSET MANAGEMENT, INC19,224$579K0.02%+17313F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\19,190$578K<0.01%-1,44613F-HRTimelineGroup
GLENMEDE TRUST CO NAin group GLENMEDE TRUST CO NA19,088$575K<0.01%+12,05413F-HRTimelineGroup
Dynamic Advisor Solutions LLC18,825$567K0.02%+3,36113F-HRTimeline
DOVER ADVISORS, LLC18,180$548K0.23%+4,58013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC18,152$547K<0.01%+85513F-HRTimelineGroup
First Pacific Financial18,018$543K0.07%+26713F-HRTimeline
GREAT LAKES ADVISORS, LLC17,773$535K<0.01%013F-HRTimeline
Patten Group, Inc.17,654$532K0.09%+1,65713F-HRTimeline
AIA Group Ltdin group AIA Group Ltd17,141$516K0.01%-91,02213F-HRTimelineGroup
Lighthouse Investment Partners, LLCin group Lighthouse Investment Partner…16,994$512K0.02%new13F-HRTimelineGroup
First Business Financial Services, Inc.16,820$507K0.05%013F-HRTimeline
NWAM LLC16,535$498K0.03%+2513F-HRTimeline
Caitong International Asset Management …16,255$490K0.09%new13F-HRTimeline
BOWEN HANES & CO INC15,975$481K0.01%013F-HRTimeline
Empirical Financial Services, LLC d.b.a…15,928$480K0.01%+6,57413F-HRTimeline
Abacus Wealth Partners, LLC15,900$479K0.04%+2,96713F-HRTimeline
&PARTNERS15,845$475K<0.01%-2,84913F-HRTimeline
DIVERSIFIED TRUST CO15,563$469K0.01%-2,43213F-HRTimeline
TRIGLAV INVESTMENTS, D.O.O.15,364$463K0.03%-16,72613F-HRTimeline
INCEPTIONR LLC15,336$462K0.11%+5,90513F-HRTimeline
New Hampshire Trust15,179$457K0.09%-58613F-HRTimeline
Midwest Trust Co15,179$457K0.01%-58613F-HRTimeline
Compass Wealth Management LLC15,125$456K0.11%013F-HRTimeline
Ledyard National Bank15,068$454K0.04%013F-HRTimeline
TOCQUEVILLE ASSET MANAGEMENT L.P.in group TOCQUEVILLE ASSET MANAGEMENT …15,025$453K0.01%013F-HRTimelineGroup
DRW Securities, LLC14,747$444K0.02%new13F-HRTimeline
Impact Partnership Wealth, LLC14,454$435K0.05%new13F-HRTimeline
Ballentine Partners, LLC14,435$435K0.01%-4,39413F-HRTimeline
Elo Mutual Pension Insurance Co13,971$421K0.01%-33,15513F-HRTimeline
AdvisorShares Investments LLC13,856$417K0.08%013F-HRTimeline
MIRABELLA FINANCIAL SERVICES LLP13,854$417K0.04%new13F-HRTimeline
Ensign Peak Advisors, Inc13,845$417K<0.01%013F-HR/ATimeline
SWP FINANCIAL LLC13,835$417K0.21%-9013F-HRTimeline
Utah Retirement Systems13,800$416K<0.01%-31613F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC13,658$411K0.02%new13F-HRTimelineGroup
IEQ CAPITAL, LLC13,566$409K<0.01%-203,36413F-HRTimeline
Clear Creek Financial Management, LLC13,409$404K0.03%+1,81913F-HRTimeline
Integrated Wealth Concepts LLC13,329$401K<0.01%+6,09013F-HRTimeline
Steward Partners Investment Advisory, L…13,047$393K<0.01%+2,52413F-HRTimeline
DNB Asset Management ASin group DNB Asset Management AS12,987$391K<0.01%new13F-HRTimelineGroup
Inspire Investing, LLCin group Inspire Investing, LLC12,971$391K0.02%+12,69913F-HRTimelineGroup
MGO ONE SEVEN LLC12,866$388K0.01%+1,97613F-HRTimeline
Optas, LLC12,803$386K0.06%+33013F-HRTimeline
Campbell & CO Investment Adviser LLC12,640$381K0.02%-68,31513F-HRTimeline
Maryland State Retirement & Pension Sys…12,454$375K0.01%013F-HRTimeline
Rathbones Group PLC12,349$372K<0.01%-23213F-HR/ATimeline
J.W. COLE ADVISORS, INC.12,270$370K0.01%-60013F-HRTimeline
RWC Asset Management LLPin group RWC ASSET ADVISORS (US) LLC12,253$369K0.02%013F-HRTimelineGroup
FRED ALGER MANAGEMENT, LLCin group FRED ALGER MANAGEMENT, LLC12,237$369K<0.01%013F-HRTimelineGroup
Laird Norton Wetherby Trust Company, LLCin group Laird Norton Wetherby Trust C…12,208$368K0.01%-2,60613F-HRTimelineGroup
Baker Avenue Asset Management, LP12,165$366K0.01%-3,39513F-HRTimeline
HUB Investment Partners, LLC12,068$363K0.01%+3,50913F-HRTimeline
Groupe la Francaisein group Groupe la Francaise12,000$360K0.01%013F-HRTimelineGroup
Ausdal Financial Partners, Inc.11,910$359K0.02%new13F-HRTimeline
DEFINE FINANCIAL, LLC11,737$354K0.19%+2213F-HRTimeline
Mariner, LLCin group Mariner, LLC11,640$351K<0.01%-86,56613F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …11,610$350K<0.01%+8,23413F-HRTimelineGroup
Kera Capital Partners, Inc.11,532$347K0.04%+1,10013F-HRTimeline
NORTH STAR ASSET MANAGEMENT INC11,500$346K0.02%013F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/11,144$336K<0.01%-2013F-HRTimelineGroup
Argent Trust Co11,051$333K0.01%013F-HRTimeline
MML INVESTORS SERVICES, LLC11,035$332K<0.01%-8,72713F-HRTimeline
PINEBRIDGE INVESTMENTS LLC11,006$332K<0.01%new13F-HRTimeline
TRUST POINT INC.10,961$330K0.03%-1,07613F-HRTimeline
Cambridge Investment Research Advisors,…10,741$324K<0.01%-19,41513F-HRTimeline
Sumitomo Mitsui DS Asset Management Com…in group SUMITOMO MITSUI FINANCIAL GRO…10,597$319K<0.01%013F-HRTimelineGroup
ELCO Management Co., LLC10,593$319K0.15%-3,10413F-HRTimeline
Versant Capital Management, Inc10,570$318K0.03%+1,47713F-HRTimeline
ProShare Advisors LLC10,461$315K<0.01%-2213F-HRTimeline
Malaga Cove Capital, LLC10,441$314K0.11%+1,31613F-HRTimeline
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK10,311$311K<0.01%-513F-HRTimelineGroup
OXFORD ASSET MANAGEMENT LLP10,161$306K0.12%new13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
SIMPLEX TRADING, LLC10,061$303K0.01%new13F-HRTimeline
VARCOV Co.9,938$299K0.11%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…9,801$295K0.01%-4,56913F-HRTimelineGroup
Merit Financial Group, LLC9,783$295K<0.01%-8,39413F-HRTimeline
Dakota Wealth Management9,665$291K0.01%-53113F-HR/ATimeline
AE Wealth Management LLC9,599$289K<0.01%+1,33313F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…9,504$286K<0.01%-4,42013F-HRTimelineGroup
Bank Julius Baer & Co. Ltd, Zurich9,500$286K<0.01%013F-HRTimeline
AlphaGrep UK Ltd9,186$277K0.08%-9,61613F-HRTimeline
Aaron Wealth Advisors LLC9,181$277K0.02%-12,98913F-HRTimeline
CERTUITY, LLC9,119$275K0.02%+2,61813F-HRTimeline
Blueshift Asset Management, LLC9,028$272K0.08%new13F-HRTimeline
Diametric Capital, LP9,025$272K0.07%-9,04513F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC8,951$270K0.02%-8,73213F-HRTimeline
Sanctuary Advisors, LLC8,811$265K<0.01%-7,81713F-HRTimeline
HB Wealth Management, LLC8,773$264K<0.01%-3,61413F-HRTimeline
SHELTON CAPITAL MANAGEMENT8,767$264K0.01%013F-HRTimeline
Cresset Asset Management, LLC8,716$263K<0.01%+1,31813F-HRTimeline
CIBC Asset Management Inc8,488$256K<0.01%013F-HRTimeline
UMB Bank, n.a.8,329$251K<0.01%+59413F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.