Tetra Tech Ownership | Who Owns Tetra Tech?

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Tetra Tech Ownership Summary

Tetra Tech is owned by 86.54% institutional investors, 0.45% insiders, and 13.01% retail investors. Vanguard group is the largest institutional shareholder, holding 9.90% of TTEK shares. Pictet Water Segregated Accounts is the top mutual fund, with 8.99% of its assets in Tetra Tech shares.

TTEK Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Tetra Tech	86.54%	0.45%	13.01%
Sector	Industrials Stocks	46.77%	12.62%	40.60%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	26.30M	9.90%	$877.95M
Blackrock	5.27M	9.85%	$1.08B
Blackrock funding, inc. /de	25.51M	9.60%	$851.39M
Pictet asset management sa	13.85M	5.21%	$497.98M
State street	11.29M	4.25%	$376.95M
Neuberger berman group	9.03M	3.40%	$301.34M
Sands capital management	7.18M	2.70%	$239.64M
Capital investors	7.08M	2.67%	$236.32M
Alliancebernstein	6.58M	2.48%	$219.68M
Amundi	5.76M	2.17%	$193.25M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Value management	907.33K	4.85%	$30.29M
Osprey private wealth	305.48K	3.71%	$10.20M
Managed asset portfolios	869.63K	3.59%	$29.03M
Crown advisors management	125.00K	3.58%	$4.50M
One8zero8	467.75K	3.37%	$15.61M
Winslow asset management	442.70K	2.77%	$14.78M
Neumeier poma investment counsel	979.39K	2.68%	$32.69M
Van berkom & associates	2.07M	1.99%	$68.93M
Renaissance investment group	293.09K	1.98%	$9.78M
Premier fund managers	1.42M	1.96%	$47.77M

Top Buyers

Holder	Shares	% Assets	Change
Capital investors	7.08M	0.04%	5.05M
Norges bank	3.05M	0.02%	3.05M
Sands capital management	7.18M	0.66%	1.98M
Goldman sachs group	1.94M	0.01%	965.05K
Aviva	1.94M	0.12%	951.72K

Top Sellers

Holder	Shares	% Assets	Change
Sarasin & partners llp	409.72K	0.14%	-4.27M
Artisan partners limited partnership	-	-	-2.78M
Bain capital public equity management ii	-	-	-2.41M
Driehaus capital management	-	-	-1.60M
Cooper creek partners management	-	-	-1.17M

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	3.05M	0.02%	3.05M	$121.39M
Mackenzie financial	352.37K	0.01%	352.37K	$11.76M
Trexquant investment lp	342.16K	0.12%	342.16K	$11.42M
Capital sarl	187.03K	0.11%	187.03K	$6.24M
Erste asset management gmbh	167.70K	0.05%	167.70K	$5.64M

Sold Out

Holder	Change
Activest wealth management	-1.00
First command advisory services	-4.00
Hhm wealth advisors	-5.00
Tfc financial management	-5.00
Horizon investments	-6.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	586	-2.66%	229,832,335	-8.07%	86	0.98%	287	-8.01%	198	-3.41%
Jun 30, 2025	587	1.73%	251,766,635	3.61%	94	1.13%	308	2.67%	199	3.11%
Mar 31, 2025	570	-11.08%	242,885,572	2.15%	91	1.16%	295	-4.22%	192	-15.42%
Dec 31, 2024	495	-23.61%	193,712,356	-17.85%	72	0.93%	224	-63.93%	183	1120.00%
Sep 30, 2024	639	5.10%	235,314,279	384.75%	88	1.07%	614	98.71%	13	-93.43%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Pictet Water Segregated Accounts	962.92K	8.99%	962.92K
iShares Core S&P Mid-Cap ETF	8.58M	3.26%	-
Vanguard Total Stock Mkt Idx Inv	8.30M	3.16%	-195.16K
Vanguard US Total Market Shares ETF	8.45M	3.15%	-33.76M
Fidelity Sust Water & Waste A Acc EUR	307.14K	2.87%	11.47K
Vanguard Small Cap Index	6.40M	2.43%	-43.12K
State St S&P Midcap® Indx SL Cl II	246.10K	2.30%	-600.00
Vontobel Global Envir Change I EUR	235.39K	2.20%	-
Pictet-Water I EUR	5.68M	2.16%	-491.12K
AB Small Cap Growth A	218.89K	2.04%	690.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 14, 2025	Birkenbeuel Gary	-	Sell	$86.05K
Feb 04, 2025	Volpi Kirsten M	-	Sell	$140.74K
Feb 04, 2025	Volpi Kirsten M	-	Sell	$57.50K
Feb 04, 2025	Volpi Kirsten M	-	Sell	$149.08K
Sep 11, 2024	BURDICK STEVEN M	EVP, CFO	Sell	$1.72M

Insider Transactions Trends

Date	Buy	Sell
2031 Q4	-	1
2024 Q3	-	6
2024 Q2	-	1
2024 Q1	-	5
2023 Q4	-	10

TTEK Ownership FAQ

Who owns the most shares of Tetra Tech?

Tetra Tech’s largest shareholders are Vanguard group (26.3M shares, 9.90%), Blackrock (5.27M shares, 9.85%), and Blackrock funding, inc. /de (25.51M shares, 9.60%). Together, they hold 29.35% of Tetra Tech’s total shares outstanding.

Does Blackrock own Tetra Tech?

Yes, BlackRock owns 9.85% of Tetra Tech, totaling 5.27M shares as of Jun 2024. This represents 0.02% of BlackRock's total assets, with a market value of 1.08B$. In the last quarter, BlackRock decreased its holdings by -56.58K shares, a -1.06% change.

Who is Tetra Tech’s biggest shareholder by percentage of total assets invested?

Value management is Tetra Tech’s biggest shareholder by percentage of total assets invested, with 4.85% of its assets in 907.32K Tetra Tech shares, valued at 30.29M$.

Who is the top mutual fund holder of Tetra Tech shares?

Pictet Water Segregated Accounts is the top mutual fund holder of Tetra Tech shares, with 8.99% of its total shares outstanding invested in 962.92K Tetra Tech shares.

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