Tetra Tech Inc (TTEK) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

262,570,000Shares Outstanding

2,331,642Shares held by institutions

$82,843,240Value of institutional holdings

89.52%Institutional ownership %

-0.28%Shares Changed QoQ

572No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Recent 13F filings as of December 2025 show that 572 institutional investors hold a position in Tetra Tech Inc (NASDAQ:TTEK).

Tetra Tech saw its institutional ownership percentage fell to 89.5% in December 2025 from 92.6% in September 2025.
In percentage terms, this reflects as a holdings change of -0.28% quarter on quarter, and a decrease of 7.89% year over year.
During the quarter, 257 institutions bought more Tetra Tech shares, 240 sold shares, and 75 of the 572 total investors held their position steady.
Collectively, institutional investors decreased their stake in Tetra Tech to 235.05Mn shares as of December 2025, a change that is down by 660.76K shares quarter on quarter and down 657.18K shares year over year.
The top institutional stake in Tetra Tech as of December 31, 2025 belongs to VANGUARD GROUP INC, which owns 25.80Mn shares, or 9.83% of the company.
Among the most significant buyers of Tetra Tech during December 2025 were NORGES BANK (3.43Mn), Impax Asset Management Group plc (3.21Mn), AQR CAPITAL MANAGEMENT LLC (2.24Mn), FERNBRIDGE CAPITAL MANAGEMENT LP (2.05Mn), Capital International Investors (1.94Mn).
Leading sellers of Tetra Tech stock in December 2025 included ALLIANCEBERNSTEIN L.P. (3.50Mn), Pictet Asset Management Holding SA (2.98Mn), STATE STREET CORP (1.87Mn), Zurcher Kantonalbank (Zurich Cantonalbank) (1.22Mn), JACOBS LEVY EQUITY MANAGEMENT, INC (1.15Mn).
The top 10 institutional holders of Tetra Tech for the quarter ending December 2025 included VANGUARD GROUP INC (25.80Mn), BlackRock, Inc. (25.73Mn), Pictet Asset Management Holding SA (11.20Mn), STATE STREET CORP (9.42Mn), Capital International Investors (9.02Mn), Neuberger Berman Group LLC (8.35Mn), SANDS CAPITAL MANAGEMENT, LLC (7.01Mn), Amundi (5.10Mn), GEODE CAPITAL MANAGEMENT, LLC (5.08Mn), FIL Ltd (4.67Mn).

572 Institutional Holders

2,331,642 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	25,800,544	-501,178	-1.91%	$865,350,246.00
BlackRock, Inc.	31 Dec, 2025	25,731,629	225,612	0.88%	$863,038,830.00
Pictet Asset Management Holding SA	31 Dec, 2025	11,204,346	-2,984,899	-21.04%	$375,811,134.00
STATE STREET CORP	31 Dec, 2025	9,424,246	-1,868,482	-16.55%	$316,089,211.00
Capital International Investors	31 Dec, 2025	9,016,577	1,936,902	27.36%	$302,415,993.00
Neuberger Berman Group LLC	31 Dec, 2025	8,351,221	-676,477	-7.49%	$280,099,964.00
SANDS CAPITAL MANAGEMENT, LLC	31 Dec, 2025	7,007,004	-172,028	-2.40%	$235,014,914.00
Amundi	31 Dec, 2025	5,095,797	-663,884	-11.53%	$170,897,995.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	5,082,342	52,375	1.04%	$170,495,825.00
FIL Ltd	31 Dec, 2025	4,667,958	381,708	8.91%	$156,563,312.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	3,676,680	83,419	2.32%	$123,321,966.00
NORGES BANK	31 Dec, 2025	3,433,575	3,433,575	0.00%	$115,162,106.00
Impax Asset Management Group plc	31 Dec, 2025	3,208,190	3,208,190	0.00%	$107,602,693.00
ALLIANCEBERNSTEIN L.P.	31 Dec, 2025	3,078,999	-3,502,245	-53.22%	$103,269,626.00
FERNBRIDGE CAPITAL MANAGEMENT LP	31 Dec, 2025	3,066,841	2,051,175	201.95%	$102,861,847.00
LGT Group Foundation	31 Dec, 2025	3,061,289	82,719	2.78%	$103,991,987.00
AQR CAPITAL MANAGEMENT LLC	31 Dec, 2025	2,875,372	2,238,721	351.64%	$96,439,970.00
Ninety One UK Ltd	31 Dec, 2025	2,802,991	-67,253	-2.34%	$94,012,302.00
AMERIPRISE FINANCIAL INC	31 Dec, 2025	2,613,627	77,609	3.06%	$87,661,046.00
M&G Plc	31 Dec, 2025	2,405,586	-3,988	-0.17%	$81,789,924.00

1 - 20 of 572

Research Tools