Tetra Tech Inc

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Tetra Tech Inc
TickerTTEK
CIK #0000831641
CUSIP88162G103
SectorTrade & Services - Services-Engineering Services
Address3475 East Foothill Boulevard, Pasadena, CA 91107
Source [EDGAR]
CIK Filing 2011 - 2025
[0000831641] 10-K
[0000831641] 10-Q
[0000831641] 3
[0000831641] 4
[0000831641] 5
[0000831641] 8-K
[0000831641] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Pictet Asset Management Sa Tetra Tech Inc [2025-02-11] 0.0
Pictet Asset Management Sa Tetra Tech Inc [2024-11-21] 81945.1
Pictet Asset Management Sa Tetra Tech Inc [2024-01-31] 5.2
AllianceBernstein LP Tetra Tech Inc [2023-02-14] 5.6
Pictet Asset Management Sa Tetra Tech Inc [2023-02-03] 5.11
Pictet Asset Management Sa Tetra Tech Inc [2022-02-10] 5.17
Dimensional Fund Advisors LP Tetra Tech Inc [2017-02-09] 5.68
Dimensional Fund Advisors LP Tetra Tech Inc [2016-02-09] 5.95
Norges Bank Tetra Tech Inc [2015-02-09] 5.05
Vanguard Group Inc Tetra Tech Inc [2012-02-09] 5.36
Form 3/4/5 Filer 2011 - 2025
Tetra Tech Inc
Birkenbeuel Gary
Douglas John M.
Volpi Kirsten M
Gandhi Prashant
Hopson Preston III
Obiaya Christiana
Shoemaker Leslie L
Burdick Steven M
Argus Roger R
Batrack Dan L
Carter Brian N
Ritrievi Kimberly E
Maguire Joanne M
Hudkins Jill
Thompson J Kenneth
Amidon Derek G
Lewis J Christopher
O'Rourke Brendan M.
Teufele Bernard
Christensen Craig L
Lemmon Richard A
Brownlie William R
Haden Patrick C
Rynning Mark A
Smith Albert E
Grant Hugh M
Auman Jan K
McDonald Kevin P
Salin Janis B
Chu Ronald J
Truly Richard H
Pagenkopf James R
Gross Frank C Jr
Bieber Michael A
Smith Douglas G
Form 13F Holdings
Firm Period DFND Voting Shares
Vanguard Group Inc [2025-06-30] SOLE 0 26,203,389
BlackRock, Inc. [2025-06-30] SOLE 24,667,682 25,694,506
Pictet Asset Management Holding SA [2025-06-30] SOLE 12,583,565 13,848,101
State Street Corp [2025-06-30] DFND 10,967,673 11,941,739
Neuberger Berman Group LLC [2025-06-30] DFND 8,445,710 8,817,394
Amundi [2025-06-30] DFND 4,680,584 6,763,413
AllianceBernstein LP [2025-06-30] DFND 3,236,222 5,875,571
Sands Capital Management LLC [2025-06-30] SOLE 3,405,625 5,200,335
Geode Capital Management LLC [2025-06-30] DFND 4,914,133 4,961,961
Sarasin & Partners LLP [2025-06-30] DFND 4,683,576 4,683,576
FIL Ltd [2025-06-30] DFND 4,481,540 4,652,399
Corient Private Wealth LLC [2025-06-30] SOLE 3,633,546 4,021,788
Bank of America Corp /DE/ [2025-06-30] DFND 155,034 3,289,645
Dimensional Fund Advisors LP [2025-06-30] SOLE 3,055,160 3,243,714
Citadel Advisors LLC [2025-06-30] DFND 3,107,660 3,107,660
Norges Bank [2025-06-30] SOLE 2,915,542 2,915,542
LGT Group Foundation [2025-06-30] DFND 0 2,802,268
Robeco Schweiz AG [2025-06-30] DFND 2,735,000 2,797,934
Ninety One UK Ltd [2025-06-30] SOLE 2,238,192 2,791,912
Morgan Stanley [2025-06-30] DFND 2,238,859 2,694,666
Invesco Ltd. [2025-06-30] DFND 0 2,530,185
Bank of New York Mellon Corp [2025-06-30] DFND 2,342,447 2,498,169
M&G Plc [2025-06-30] SOLE 579,712 2,416,512
Ameriprise Financial Inc [2025-06-30] DFND 0 2,396,981
Northern Trust Corp [2025-06-30] DFND 2,335,995 2,365,083
Zurcher Kantonalbank (Zurich Cantonalbank) [2025-06-30] SOLE 2,136,509 2,201,231
Charles Schwab Investment Management Inc [2025-06-30] SOLE 2,111,083 2,111,086
Van Berkom & Associates Inc. [2025-06-30] SOLE 807,395 2,062,811
Capital International Investors [2025-06-30] DFND 2,028,190 2,028,190
Allianz Asset Management GmbH [2025-06-30] DFND 2,016,215 2,019,572
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