Tetra Tech TTEK Institutional Ownership

NASDAQ TTEK

$37.00 +0.43 (+1.18%)

At close: Aug 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

574 Institutions

Increased 278 48.4%

Unchanged 80 13.9%

Reduced 216 37.6%

Ownership Statistics

13F · as of 31 Mar, 2026

Institutional Ownership

94.52%

▲+0.70 pp QoQ

Shares Held by Institutions

245.90Mn

of 260.14Mn outstanding

▲+16.47% QoQ

Shares Outstanding

260.14Mn

14.25Mn held outside 13F filers

Institutional Investors

574

filed 13F for Mar 2026

▼-18 vs prior quarter

Net Shares Added (QoQ)

+34.77Mn

accumulated since last quarter

Value of Holdings

$8.70Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 31 Mar, 2026

Tetra Tech Inc (NASDAQ:TTEK) appears in 574 institutional 13F filings for the quarter ending March 2026.

Their combined ownership stood at 94.5% of outstanding shares in March 2026, up from 93.8% in December 2025.
They increased total shares held in Tetra Tech by 16.47% from the prior quarter, while the number of investors in TTEK increased 1.23% year over year.
Of these 574 holders, 278 added to their stakes in Tetra Tech, 216 trimmed positions, and 80 made no changes.
The aggregate institutional position in Tetra Tech amounted to 245.9Mn shares as of March 2026, up by 34.77Mn shares quarter on quarter, and down 15.62Mn shares year over year.
BlackRock, Inc. leads ownership in TTEK with 26.79Mn shares as of March 31, 2026, equal to 10.3% of outstanding shares.
Leading buyers of Tetra Tech shares for the quarter ending March 2026 were VANGUARD PORTFOLIO MANAGEMENT LLC (12.64Mn), VANGUARD CAPITAL MANAGEMENT LLC (11.71Mn), WELLINGTON MANAGEMENT GROUP LLP (3.75Mn), FULLER & THALER ASSET MANAGEMENT, INC. (3.31Mn), Capital International Investors (2.37Mn).
Leading sellers of Tetra Tech shares for the quarter ending March 2026 were Corient Private Wealth LLC (1.75Mn), Pictet Asset Management Holding SA (1.56Mn), AQR CAPITAL MANAGEMENT LLC (1.36Mn), Copeland Capital Management, LLC (1.3Mn), Goldman Sachs Group Inc (1.18Mn).
Per Business Quant data, the top 10 holders of Tetra Tech for the quarter ending March 2026 are BlackRock, Inc. (26.79Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (12.64Mn), VANGUARD CAPITAL MANAGEMENT LLC (11.71Mn), Capital International Investors (11.39Mn), Pictet Asset Management Holding SA (9.64Mn), State Street Corp (9.64Mn), Neuberger Berman Group LLC (7.27Mn), SANDS CAPITAL MANAGEMENT, LLC (6.66Mn), GEODE CAPITAL MANAGEMENT, LLC (5.22Mn), FIL Ltd (4.83Mn).

Form 13F Holdings

574 Institutional Holders

Report period 31 Mar, 2026

Total shares held 245.90Mn

Of outstanding 94.52%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	26,790,406	10.30%	▲1,058,777	+4.11%	$806.93Mn
2	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	12,643,094	4.86%	▲12,643,094	0.00%	$380.81Mn
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	11,709,151	4.50%	▲11,709,151	0.00%	$352.68Mn
4	Capital International Investors	0001562230	11,385,267	4.38%	▲2,368,690	+26.27%	$342.92Mn
5	Pictet Asset Management Holding SA	0001993888	9,644,792	3.71%	▼1,559,554	-13.92%	$290.49Mn
6	State Street Corp	0000093751	9,635,912	3.70%	▲211,666	+2.25%	$290.23Mn
7	Neuberger Berman Group LLC	0001465109	7,269,657	2.79%	▼1,081,564	-12.95%	$218.96Mn
8	SANDS CAPITAL MANAGEMENT, LLC	0001020066	6,658,823	2.56%	▼348,181	-4.97%	$200.56Mn
9	GEODE CAPITAL MANAGEMENT, LLC	0001214717	5,217,448	2.01%	▲135,106	+2.66%	$157.19Mn
10	FIL Ltd	0000318989	4,832,672	1.86%	▲164,714	+3.53%	$145.56Mn
11	WELLINGTON MANAGEMENT GROUP LLP	0000902219	4,804,049	1.85%	▲3,748,775	+355.24%	$144.70Mn
12	Amundi	0001330387	4,749,247	1.83%	▼346,550	-6.80%	$143.06Mn
13	Van Berkom & Associates Inc.	0001524408	4,571,576	1.76%	▲2,278,981	+99.41%	$137.70K
14	Impax Asset Management Group plc	0001749768	3,830,074	1.47%	▲621,884	+19.38%	$115.36Mn
15	DIMENSIONAL FUND ADVISORS LP	0000354204	3,789,240	1.46%	▲112,560	+3.06%	$114.13Mn
16	FERNBRIDGE CAPITAL MANAGEMENT LP	0001827734	3,400,775	1.31%	▲333,934	+10.89%	$102.43Mn
17	FULLER & THALER ASSET MANAGEMENT, INC.	0001082327	3,314,443	1.27%	▲3,314,443	0.00%	$99.83Mn
18	LGT Group Foundation	0001911278	3,161,708	1.22%	▲100,419	+3.28%	$95.23Mn
19	Invesco Ltd.	0000914208	2,934,900	1.13%	▲364,793	+14.19%	$88.40Mn
20	ALLIANCEBERNSTEIN L.P.	0001109448	2,807,465	1.08%	▼271,534	-8.82%	$94.16Mn

Showing 1 to 20 of 574 holders