13F Insight
DOSSIER · 13F Holders · Q1 2026Technology · Services-Engineering ServicesBellwetherCompounder
TTEK

TETRA TECH INC NEW

621 institutions still hold TETRA TECH INC NEW as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 88162G103·Services-Engineering Services·621 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 2.0%
vs prior quarter
13F value held
$4.3B
50.0% inst. owned
of float
Holders
621
+18 QoQ
filers reporting
Activity
+69 / −14
+962 added · −733 reduced
this quarter
Concentration
18.92%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

621 institutions reported TTEK in Q1 2026. BlackRock, Inc. leads at 18.9% of the visible book. +18 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$807M26.8M0.01%Q1 202602
Vanguard Portfolio Management
CIK 0002100121
$381M12.6M0.02%Q1 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$353M11.7M0.01%Q1 202604
Capital International Investors
CIK 0001562230
$343M11.4M0.08%Q1 202605
Pictet Asset Management Holding SA
CIK 0001993888
$290M9.6M0.31%Q1 202606
STATE STREET CORP
CIK 0000093751
$290M9.6M0.01%Q1 202607
Neuberger Berman Group LLC
CIK 0001465109
$219M7.3M0.17%Q1 202608
SANDS CAPITAL MANAGEMENT, LLC
CIK 0001020066
$201M6.7M0.79%Q1 202609
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$157M5.2M0.01%Q1 202610
FIL Ltd
CIK 0000318989
$146M4.8M0.11%Q1 202611
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$145M4.8M0.03%Q1 202612
Amundi
CIK 0001330387
$143M4.7M0.04%Q1 202613
Impax Asset Management Group plc
CIK 0001749768
$115M3.8M0.80%Q1 202614
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$114M3.8M0.02%Q1 202615
FERNBRIDGE CAPITAL MANAGEMENT LP
CIK 0001827734
$102M3.4M6.56%Q1 202616
FULLER & THALER ASSET MANAGEMENT, INC.
CIK 0001082327
$100M3.3M0.34%Q1 202617
LGT Group Foundation
CIK 0001911278
$95M3.2M1.16%Q1 202618
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$94M2.8M0.03%Q1 202619
Invesco Ltd.
CIK 0000914208
$88M2.9M0.01%Q1 202620
Ninety One UK Ltd
CIK 0001418329
$82M2.7M0.19%Q1 2026
Page 1 of 32
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