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Tetra Tech Inc

TTEK
Exchange
Nasdaq
Industry
Services-Engineering Services
SEC CIK
0000831641

No open-market purchases or sales by Tetra Tech Inc insiders were filed in the last 90 days; 555 institutions reported holding it in 13F filings for Q2 2026, worth $7.32B in total; no superinvestor holds it.

13F holders, Q1 2026

Institutional positions in Tetra Tech Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
593
−10 vs. Q4 2025
Shares held
243.5M
+31.1M (+14.7%) vs. Q4 2025
Total value
$7.35B
+$227.0M (+3.2%) vs. Q4 2025
New holders
74
201 more added
Sold out
84
230 more reduced

8 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting TTEK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2026: 593 institutions
Q1 2021: 365 institutionsQ2 2021: 366 institutionsQ3 2021: 359 institutionsQ4 2021: 401 institutionsQ1 2022: 404 institutionsQ2 2022: 415 institutionsQ3 2022: 412 institutionsQ4 2022: 470 institutionsQ1 2023: 445 institutionsQ2 2023: 455 institutionsQ3 2023: 471 institutionsQ4 2023: 510 institutionsQ1 2024: 512 institutionsQ2 2024: 600 institutionsQ3 2024: 646 institutionsQ4 2024: 638 institutionsQ1 2025: 568 institutionsQ2 2025: 590 institutionsQ3 2025: 597 institutionsQ4 2025: 611 institutionsQ1 2026: 593 institutionsQ2 2026: 555 institutions
Value heldQ1 2026: $7.35B
Q1 2021: $6.39BQ2 2021: $5.68BQ3 2021: $7.08BQ4 2021: $7.93BQ1 2022: $7.86BQ2 2022: $6.31BQ3 2022: $5.91BQ4 2022: $6.68BQ1 2023: $6.81BQ2 2023: $7.67BQ3 2023: $7.09BQ4 2023: $7.87BQ1 2024: $8.66BQ2 2024: $9.88BQ3 2024: $11.2BQ4 2024: $9.45BQ1 2025: $7.18BQ2 2025: $8.94BQ3 2025: $8.22BQ4 2025: $8.10BQ1 2026: $7.35BQ2 2026: $7.32B
Institutions holding TTEK and their total value by quarter
QuarterHoldersValue
Q2 2026555$7.32B
Q1 2026593$7.35B
Q4 2025611$8.10B
Q3 2025597$8.22B
Q2 2025590$8.94B
Q1 2025568$7.18B
Q4 2024638$9.45B
Q3 2024646$11.2B
Q2 2024600$9.88B
Q1 2024512$8.66B
Q4 2023510$7.87B
Q3 2023471$7.09B
Q2 2023455$7.67B
Q1 2023445$6.81B
Q4 2022470$6.68B
Q3 2022412$5.91B
Q2 2022415$6.31B
Q1 2022404$7.86B
Q4 2021401$7.93B
Q3 2021359$7.08B
Q2 2021366$5.68B
Q1 2021365$6.39B

Institutions, Q1 2026

Shares, value and share of portfolio for each institution holding Tetra Tech Inc; share changes are against Q4 2025.

Institutions holding TTEK in Q1 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Strengthening Families & Communities, LLC0$10.00%0Unchanged
Clear Street Markets LLC1$300.00%+1New
Curio Wealth, LLC1$300.00%+1New
Quaker Wealth Management, LLC1$310.00%−17−94.4%Reduced
Raleigh Capital Management Inc.1$400.00%00.0%Unchanged
AdvisorNet Financial, Inc2$600.00%−10−83.3%Reduced
Raffa Wealth Management, LLC2$600.00%+2New
IMA Wealth, Inc.5$1500.00%00.0%Unchanged
South State Corp.5$1510.00%−79−94.0%Reduced
Owl Creek Wealth Partners LLC5$1510.00%+5New
HFM Investment Advisors, LLC10$3010.00%−4−28.6%Reduced
Bare Financial Services, Inc12$3610.00%00.0%Unchanged
DecisionPoint Financial, LLC13$3920.00%00.0%Unchanged
Vermillion Wealth Management, Inc.15$4520.00%+15New
Bogart Wealth, LLC16$4820.00%−16−50.0%Reduced
Hughes Financial Services, LLC16$4820.00%00.0%Unchanged
Twin Peaks Wealth Advisors, LLC19$5720.00%+19New
Private Wealth Management Group, LLC20$6030.00%−45−69.2%Reduced
Intentional Wealth Strategies, LLC24$7230.00%+24New
Signature Equity Partners, LLC25$7530.00%−203−89.0%Reduced
NBT Bank N A25$7530.00%+25New
ZRC Wealth Management, LLC26$7840.00%−101−79.5%Reduced
DiNuzzo Private Wealth, Inc.32$9640.00%−1−3.0%Reduced
Bay Harbor Wealth Management, LLC33$9930.00%+15+83.3%Added
Avion Wealth58$1.00K0.00%00.0%Unchanged
Essential Partners LLC35$1.05K0.00%−2,916−98.8%Reduced
Principia Wealth Advisory, LLC35$1.05K0.00%−5−12.5%Reduced
Golden State Equity Partners35$1.06K0.00%+35New
Financial Management Professionals, Inc.40$1.21K0.00%00.0%Unchanged
Bell Investment Advisors, Inc40$1.21K0.00%00.0%Unchanged
Creative Financial Designs Inc41$1.24K0.00%00.0%Unchanged
Rialto Wealth Management, LLC41$1.24K0.00%+5+13.9%Added
Cromwell Holdings LLC43$1.29K0.00%+12+38.7%Added
CoreCap Advisors, LLC45$1.35K0.00%00.0%Unchanged
Steigerwald, Gordon & Koch Inc.49$1.48K0.00%00.0%Unchanged
Lummis Asset Management, LP50$1.51K0.00%00.0%Unchanged
Highline Wealth Partners LLC53$1.60K0.00%+53New
Anchor Investment Management, LLC55$1.66K0.00%00.0%Unchanged
Transamerica Financial Advisors, Inc.57$1.72K0.00%+9+18.8%Added
Cornerstone Planning Group LLC56$1.75K0.00%−585−91.3%Reduced
Hazlett, Burt & Watson, Inc.66$2.00K0.00%00.0%Unchanged
Keating Financial Advisory Services, Inc.67$2.02K0.00%−31−31.6%Reduced
Quent Capital, LLC68$2.05K0.00%−294−81.2%Reduced
Armstrong Advisory Group, Inc73$2.20K0.00%00.0%Unchanged
St Germain D J Co Inc75$2.26K0.00%00.0%Unchanged
WPG Advisers, LLC77$2.32K0.00%−376−83.0%Reduced
Prestige Wealth Management Group LLC80$2.41K0.00%−230−74.2%Reduced
Wealth Enhancement Trust Services, Inc.85$2.56K0.00%00.0%Unchanged
Whipplewood Advisors, LLC90$2.71K0.00%+90New
Capital Analysts, LLC100$3.00K0.00%00.0%Unchanged
Caitlin John, LLC101$3.04K0.00%+101New
SBI Securities Co., Ltd.104$3.13K0.00%−16−13.3%Reduced
Whittier Trust Co of Nevada Inc102$3.18K0.00%+42+70.0%Added
Mather Group, LLC.108$3.25K0.00%+108New
Synergy Investment Management, LLC111$3.34K0.00%+111New
JFS Wealth Advisors, LLC115$3.46K0.00%−11−8.7%Reduced
GWM Advisors LLC120$3.61K0.00%−555−82.2%Reduced
Fortitude Family Office, LLC120$3.61K0.00%+71+144.9%Added
High Note Wealth, LLC121$3.65K0.00%00.0%Unchanged
Bayban122$3.67K0.00%00.0%Unchanged
Pinnacle Wealth Planning Services, Inc.127$3.83K0.00%00.0%Unchanged
Activest Wealth Management140$4.22K0.00%−211−60.1%Reduced
Meeder Asset Management Inc140$4.22K0.00%+140New
Capital & Planning, LLC170$5.12K0.00%+170New
Sunbelt Securities, Inc.175$5.27K0.00%−18−9.3%Reduced
Itau Unibanco Holding S.A.176$5.30K0.00%00.0%Unchanged
Ancora Advisors, LLC183$5.51K0.00%+183New
Brown, Lisle/Cummings, Inc.190$5.72K0.00%+190New
Maseco LLP197$5.93K0.00%+197New
Dunhill Financial, LLC202$6.10K0.00%+154+320.8%Added
Gunpowder Capital Management, LLC dba Oliver Wealth Management212$6.38K0.00%00.0%Unchanged
N.E.W. Advisory Services LLC215$6.48K0.00%00.0%Unchanged
Retirement Wealth Solutions LLC216$6.51K0.00%−116−34.9%Reduced
Farmers & Merchants Investments Inc225$6.78K0.00%00.0%Unchanged
Westside Investment Management, Inc.239$7.42K0.00%00.0%Unchanged
Mascoma Wealth Management LLC250$7.53K0.00%00.0%Unchanged
TD Waterhouse Canada Inc.250$7.65K0.00%+250New
Elequin Capital LP254$7.65K0.00%+19+8.1%Added
Atlantic Union Bankshares Corp264$7.97K0.00%+8+3.1%Added
Clal Insurance Enterprises Holdings Ltd256$8.00K0.00%+74+40.7%Added
Danske Bank A/S300$9.04K0.00%−1,300−81.3%Reduced
Basecamp Wealth Advisors LLC313$9.43K0.00%+133+73.9%Added
Rossby Financial, LCC322$9.89K0.00%+267+485.5%Added
Glen Eagle Advisors, LLC332$9.99K0.00%00.0%Unchanged
Covestor Ltd338$10.0K0.01%−172−33.7%Reduced
CBIZ Investment Advisory Services, LLC402$12.1K0.00%−695−63.4%Reduced
Rothschild Investment LLC439$13.2K0.00%−1,468−77.0%Reduced
Smartleaf Asset Management LLC455$13.5K0.00%+145+46.8%Added
First Horizon Corp450$13.6K0.00%−430−48.9%Reduced
Guinness Asset Management LTD489$14.7K0.00%00.0%Unchanged
Kemnay Advisory Services Inc.505$15.2K0.00%+505New
Rexford Capital Inc525$15.8K0.01%00.0%Unchanged
Vega Investment Solutions574$17.3K0.00%00.0%Unchanged
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.585$17.6K0.00%00.0%Unchanged
Plante Moran Financial Advisors, LLC595$17.9K0.00%00.0%Unchanged
Root Financial Partners, LLC600$18.1K0.00%−16−2.6%Reduced
Trust Co626$18.9K0.00%+1+0.2%Added
Twin Tree Management, LP645$19.4K0.00%+645New
Parkside Financial Bank & Trust650$19.6K0.00%+230+54.8%Added
Essential Investment Partners LLC660$19.9K0.02%00.0%Unchanged