Tetra Tech TTEK Institutional Ownership

NASDAQ TTEK

$36.49 +0.78 (+2.18%)

At close: Sep 11, 2026 · 4:00 PM EDT

Institutions by Trading Activity

548 Institutions

Increased 260 47.4%

Unchanged 76 13.9%

Reduced 212 38.7%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

98.66%

▲+4.07 pp QoQ

Shares Held by Institutions

254.68Mn

of 258.15Mn outstanding

▲+10.76% QoQ

Shares Outstanding

258.15Mn

3.47Mn held outside 13F filers

Institutional Investors

548

filed 13F for Jun 2026

▼-36 vs prior quarter

Net Shares Added (QoQ)

+24.74Mn

accumulated since last quarter

Value of Holdings

$9.29Bn

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 30 Jun, 2026

Tetra Tech Inc (NASDAQ:TTEK) showed up in the 13F filings of 548 institutional investors as of June 2026.

Collectively, these holders controlled 98.7% of Tetra Tech's outstanding shares in June 2026, up from 94.6% in March 2026.
They increased total shares held in Tetra Tech by 10.76% from last quarter, and the number of investors in TTEK decreased 6.64% annually.
Of these 548 holders, 260 added to their stakes in Tetra Tech, 212 trimmed positions, and 76 made no changes.
The aggregate institutional position in Tetra Tech amounted to 254.68Mn shares as of June 2026, up by 24.74Mn shares quarter on quarter, and down 3.18Mn shares year over year.
BlackRock, Inc. holds the largest position in TTEK at 28.68Mn shares as of June 30, 2026, or 11.11% of shares outstanding.
The largest buyers of Tetra Tech for the quarter ending June 2026 were FMR LLC (8.44Mn), ARROWSTREET CAPITAL, LIMITED PARTNERSHIP (3.85Mn), NORGES BANK (3.23Mn), AQR CAPITAL MANAGEMENT LLC (2.6Mn), Energy Income Partners, LLC (2.37Mn).
The largest sellers of Tetra Tech for the quarter ending June 2026 were Pictet Asset Management Holding SA (4.89Mn), Neuberger Berman Group LLC (2.86Mn), ALLIANCEBERNSTEIN L.P. (2.47Mn), Van Berkom & Associates Inc. (2.1Mn), BESSEMER GROUP INC (1.33Mn).
Tetra Tech's 10 largest shareholders as of June 2026 include BlackRock, Inc. (28.68Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (12.47Mn), VANGUARD CAPITAL MANAGEMENT LLC (11.73Mn), Capital International Investors (11.65Mn), State Street Corp (9.76Mn), FMR LLC (8.77Mn), GEODE CAPITAL MANAGEMENT, LLC (6.83Mn), FIL Ltd (5.47Mn), Amundi (5.1Mn), FULLER & THALER ASSET MANAGEMENT, INC. (4.92Mn) per Business Quant data.

Form 13F Holdings

548 Institutional Holders

Report period 30 Jun, 2026

Total shares held 254.68Mn

Of outstanding 98.66%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	28,675,276	11.11%	▲1,884,870	+7.04%	$828.43Mn
2	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	12,467,970	4.83%	▼175,124	-1.39%	$360.20Mn
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	11,725,738	4.54%	▲16,587	+0.14%	$338.76Mn
4	Capital International Investors	0001562230	11,651,238	4.51%	▲265,971	+2.34%	$336.60Mn
5	State Street Corp	0000093751	9,761,640	3.78%	▲125,728	+1.30%	$282.01Mn
6	FMR LLC	0000315066	8,768,611	3.40%	▲8,440,359	+2,571.30%	$253.33Mn
7	GEODE CAPITAL MANAGEMENT, LLC	0001214717	6,833,071	2.65%	▲1,615,623	+30.97%	$197.44Mn
8	FIL Ltd	0000318989	5,471,691	2.12%	▲639,019	+13.22%	$158.08Mn
9	Amundi	0001330387	5,098,519	1.98%	▲349,272	+7.35%	$147.26Mn
10	FULLER & THALER ASSET MANAGEMENT, INC.	0001082327	4,921,268	1.91%	▲1,606,825	+48.48%	$142.18Mn
11	Pictet Asset Management Holding SA	0001993888	4,759,290	1.84%	▼4,885,502	-50.65%	$137.50Mn
12	WELLINGTON MANAGEMENT GROUP LLP	0000902219	4,674,089	1.81%	▼129,960	-2.71%	$135.03Mn
13	DIMENSIONAL FUND ADVISORS LP	0000354204	4,446,215	1.72%	▲656,975	+17.34%	$128.45Mn
14	Neuberger Berman Group LLC	0001465109	4,408,987	1.71%	▼2,860,670	-39.35%	$127.38Mn
15	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	4,393,728	1.70%	▲3,850,262	+708.46%	$126.93Mn
16	Invesco Ltd.	0000914208	4,116,893	1.59%	▲1,181,993	+40.27%	$118.94Mn
17	AQR CAPITAL MANAGEMENT LLC	0001167557	4,111,603	1.59%	▲2,597,141	+171.49%	$117.10Mn
18	Impax Asset Management Group plc	0001749768	3,931,741	1.52%	▲101,667	+2.65%	$113.59Mn
19	LGT Group Foundation	0001911278	3,745,171	1.45%	▲583,463	+18.45%	$108.20Mn
20	NORGES BANK	0001374170	3,230,988	1.25%	▲3,230,988	0.00%	$93.34Mn

Showing 1 to 20 of 548 holders