Tetra Tech Inc

TTEK

Exchange: Nasdaq
Industry: Services-Engineering Services
SEC CIK: 0000831641

SEC filings (opens in a new tab)

No open-market purchases or sales by Tetra Tech Inc insiders were filed in the last 90 days; 555 institutions reported holding it in 13F filings for Q2 2026, worth $7.32B in total; no superinvestor holds it.

13F holders, Q1 2021

Institutional positions in Tetra Tech Inc as of Mar 31, 2021. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders: 365; No complete 13F data for Q4 2020
Shares held: 47.1M; No complete 13F data for Q4 2020
Total value: $6.39B; No complete 13F data for Q4 2020

Holders and value by quarter

Institutions reporting TTEK on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2021: 365 institutions

Value heldQ1 2021: $6.39B

Institutions holding TTEK and their total value by quarter
Quarter	Holders	Value
Q2 2026	555	$7.32B
Q1 2026	593	$7.35B
Q4 2025	611	$8.10B
Q3 2025	597	$8.22B
Q2 2025	590	$8.94B
Q1 2025	568	$7.18B
Q4 2024	638	$9.45B
Q3 2024	646	$11.2B
Q2 2024	600	$9.88B
Q1 2024	512	$8.66B
Q4 2023	510	$7.87B
Q3 2023	471	$7.09B
Q2 2023	455	$7.67B
Q1 2023	445	$6.81B
Q4 2022	470	$6.68B
Q3 2022	412	$5.91B
Q2 2022	415	$6.31B
Q1 2022	404	$7.86B
Q4 2021	401	$7.93B
Q3 2021	359	$7.08B
Q2 2021	366	$5.68B
Q1 2021	365	$6.39B

Institutions, Q1 2021

Shares, value and share of portfolio for each institution holding Tetra Tech Inc.

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.

Institutions holding TTEK in Q1 2021
Institution	Shares	Value	% of portfolio	Change in shares	Action
Advisors Asset Management, Inc.	37,772	$5.13M	0.08%	–	–
Granahan Investment Management Inc	36,721	$4.98M	0.11%	–	–
Rice Hall James & Associates, LLC	36,189	$4.91M	0.16%	–	–
D. E. Shaw & Co., Inc.	35,828	$4.86M	0.01%	–	–
Susquehanna Fundamental Investments, LLC	35,250	$4.78M	0.08%	–	–
State of New Jersey Common Pension Fund D	34,719	$4.71M	0.02%	–	–
HighTower Advisors, LLC	34,045	$4.59M	0.01%	–	–
McKinley Capital Management LLC /Delaware	32,733	$4.44M	0.33%	–	–
Thrivent Financial for Lutherans	32,108	$4.36M	0.01%	–	–
Millennium Management LLC	31,647	$4.29M	0.01%	–	–
PDT Partners, LLC	31,500	$4.28M	0.31%	–	–
Comerica Bank	31,801	$4.26M	0.03%	–	–
Bridge City Capital, LLC	30,982	$4.21M	1.39%	–	–
Waddell & Reed Financial Inc	30,969	$4.20M	0.01%	–	–
South Dakota Investment Council	30,444	$4.13M	0.07%	–	–
Two Sigma Advisers, LP	29,500	$4.00M	0.01%	–	–
Balyasny Asset Management LLC	28,650	$3.89M	0.02%	–	–
Ashfield Capital Partners, LLC	28,299	$3.84M	0.31%	–	–
Fisher Asset Management, LLC	27,790	$3.77M	0.00%	–	–
Cookson Peirce & Co Inc	27,684	$3.76M	0.25%	–	–
Nisa Investment Advisors, LLC	27,635	$3.75M	0.02%	–	–
Formula Growth Ltd	27,500	$3.73M	0.54%	–	–
Catalyst Capital Advisors LLC	26,305	$3.57M	0.20%	–	–
Kennedy Capital Management, Inc.	26,138	$3.55M	0.07%	–	–
SG Americas Securities, LLC	25,846	$3.51M	0.02%	–	–
Metropolitan Life Insurance Co	23,443	$3.18M	0.05%	–	–
Teachers Retirement System of the State of Kentucky	22,916	$3.11M	0.03%	–	–
Stifel Financial Corp	21,491	$2.92M	0.00%	–	–
Great West Life Assurance Co	21,329	$2.89M	0.01%	–	–
State of Michigan Retirement System	20,045	$2.72M	0.02%	–	–
State Board of Administration of Florida Retirement System	20,047	$2.72M	0.01%	–	–
Ameritas Investment Partners, Inc.	19,313	$2.62M	0.10%	–	–
Brinker Capital Investments, LLC	19,021	$2.58M	0.04%	–	–
BNP Paribas Arbitrage, SA	18,825	$2.55M	0.01%	–	–
ProShare Advisors LLC	18,818	$2.55M	0.01%	–	–
STRS Ohio	18,100	$2.46M	0.01%	–	–
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	18,091	$2.46M	0.03%	–	–
Oregon Public Employees Retirement Fund	17,858	$2.42M	0.03%	–	–
Arrowstreet Capital, Limited Partnership	17,100	$2.32M	0.00%	–	–
Tudor Investment Corp Et Al	17,057	$2.31M	0.05%	–	–
Alpine Woods Capital Investors, LLC	17,015	$2.31M	0.26%	–	–
Sumitomo Mitsui Trust Holdings, Inc.	16,463	$2.23M	0.00%	–	–
Citadel Advisors LLC	16,035	$2.18M	0.00%	–	–
Arabesque Asset Management Ltd	15,965	$2.17M	0.96%	–	–
Arizona State Retirement System	15,655	$2.13M	0.02%	–	–
Advisor Group Holdings, Inc.	15,199	$2.07M	0.00%	–	–
NFJ Investment Group, LLC	15,238	$2.07M	0.04%	–	–
Staley Capital Advisers Inc	15,000	$2.04M	0.11%	–	–
Employees Retirement System of Texas	15,000	$2.04M	0.03%	–	–
Isthmus Partners, LLC	14,988	$2.03M	0.37%	–	–
Lapides Asset Management, LLC	14,600	$1.98M	0.83%	–	–
Bristlecone Advisors, LLC	14,455	$1.96M	0.30%	–	–
AQR Capital Management LLC	14,216	$1.92M	0.00%	–	–
Louisiana State Employees Retirement System	14,100	$1.91M	0.05%	–	–
Shell Asset Management Co	13,480	$1.83M	0.04%	–	–
Three Peaks Capital Management, LLC	12,954	$1.76M	0.55%	–	–
Van Eck Associates Corp	11,950	$1.62M	0.00%	–	–
Baird Financial Group, Inc.	11,704	$1.59M	0.00%	–	–
Victory Capital Management Inc	11,500	$1.56M	0.00%	–	–
Los Angeles Capital Management LLC	11,386	$1.54M	0.01%	–	–
Aptus Capital Advisors, LLC	11,346	$1.54M	0.08%	–	–
Cna Financial Corp	11,060	$1.50M	0.46%	–	–
O'Shaughnessy Asset Management, LLC	10,857	$1.47M	0.03%	–	–
TD Asset Management Inc	10,445	$1.42M	0.00%	–	–
Principal Street Partners, LLC	10,346	$1.40M	0.18%	–	–
Handelsbanken Fonder AB	10,309	$1.40M	0.01%	–	–
HSBC Holdings PLC	10,257	$1.40M	0.00%	–	–
D.A. Davidson & Co.	10,000	$1.36M	0.02%	–	–
Citigroup Inc	9,968	$1.35M	0.00%	–	–
Lazard Asset Management LLC	9,650	$1.31M	0.00%	–	–
Raymond James & Associates	9,590	$1.30M	0.00%	–	–
New Mexico Educational Retirement Board	9,400	$1.28M	0.05%	–	–
First Republic Investment Management, Inc.	9,322	$1.26M	0.00%	–	–
First National Bank of Omaha	9,172	$1.25M	0.06%	–	–
SFE Investment Counsel	9,093	$1.23M	0.36%	–	–
Northwestern Mutual Investment Management Company, LLC	9,045	$1.23M	0.02%	–	–
Jane Street Group, LLC	8,888	$1.21M	0.00%	–	–
Martingale Asset Management L P	8,823	$1.20M	0.01%	–	–
State of Tennessee, Treasury Department	8,545	$1.16M	0.00%	–	–
State of Alaska, Department of Revenue	8,496	$1.15M	0.01%	–	–
SEI Investments Co	9,950	$1.15M	0.00%	–	–
Amalgamated Bank	8,142	$1.10M	0.04%	–	–
Manchester Capital Management LLC	7,906	$1.07M	0.16%	–	–
Waratah Capital Advisors Ltd.	7,899	$1.07M	0.06%	–	–
Public Employees Retirement Association of Colorado	7,833	$1.06M	0.00%	–	–
Raymond James Financial Services Advisors, Inc.	7,713	$1.05M	0.00%	–	–
Tortoise Capital Advisors, L.L.C.	7,452	$1.01M	0.02%	–	–
Vident Investment Advisory, LLC	7,397	$1.00M	0.03%	–	–
Tortoise Index Solutions, LLC	7,397	$1.00M	0.24%	–	–
AtonRa Partners	7,286	$989.0K	0.44%	–	–
Amundi Asset Management US, Inc.	7,276	$988.0K	0.00%	–	–
Cubist Systematic Strategies, LLC	7,281	$988.0K	0.01%	–	–
Commonwealth Equity Services, LLC	7,215	$979.0K	0.00%	–	–
Legacy Wealth Asset Management, LLC	7,166	$973.0K	0.45%	–	–
Mackay Shields LLC	7,100	$964.0K	0.01%	–	–
Private Advisor Group, LLC	7,066	$959.0K	0.01%	–	–
Man Group plc	7,044	$956.0K	0.00%	–	–
Bank of Montreal	6,758	$953.0K	0.00%	–	–
Zurcher Kantonalbank (Zurich Cantonalbank)	7,012	$952.0K	0.01%	–	–
DuPont Capital Management Corp	6,785	$921.0K	0.02%	–	–