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
Principal Street Partners, LLC	10,346	$1.40M	0.18%	–	–
TD Asset Management Inc	10,445	$1.42M	0.00%	–	–
O'Shaughnessy Asset Management, LLC	10,857	$1.47M	0.03%	–	–
Cna Financial Corp	11,060	$1.50M	0.46%	–	–
Aptus Capital Advisors, LLC	11,346	$1.54M	0.08%	–	–
Los Angeles Capital Management LLC	11,386	$1.54M	0.01%	–	–
Victory Capital Management Inc	11,500	$1.56M	0.00%	–	–
Baird Financial Group, Inc.	11,704	$1.59M	0.00%	–	–
Van Eck Associates Corp	11,950	$1.62M	0.00%	–	–
Three Peaks Capital Management, LLC	12,954	$1.76M	0.55%	–	–
Shell Asset Management Co	13,480	$1.83M	0.04%	–	–
Louisiana State Employees Retirement System	14,100	$1.91M	0.05%	–	–
AQR Capital Management LLC	14,216	$1.92M	0.00%	–	–
Bristlecone Advisors, LLC	14,455	$1.96M	0.30%	–	–
Lapides Asset Management, LLC	14,600	$1.98M	0.83%	–	–
Isthmus Partners, LLC	14,988	$2.03M	0.37%	–	–
Staley Capital Advisers Inc	15,000	$2.04M	0.11%	–	–
Employees Retirement System of Texas	15,000	$2.04M	0.03%	–	–
NFJ Investment Group, LLC	15,238	$2.07M	0.04%	–	–
Advisor Group Holdings, Inc.	15,199	$2.07M	0.00%	–	–
Arizona State Retirement System	15,655	$2.13M	0.02%	–	–
Arabesque Asset Management Ltd	15,965	$2.17M	0.96%	–	–
Citadel Advisors LLC	16,035	$2.18M	0.00%	–	–
Sumitomo Mitsui Trust Holdings, Inc.	16,463	$2.23M	0.00%	–	–
Alpine Woods Capital Investors, LLC	17,015	$2.31M	0.26%	–	–
Tudor Investment Corp Et Al	17,057	$2.31M	0.05%	–	–
Arrowstreet Capital, Limited Partnership	17,100	$2.32M	0.00%	–	–
Oregon Public Employees Retirement Fund	17,858	$2.42M	0.03%	–	–
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	18,091	$2.46M	0.03%	–	–
STRS Ohio	18,100	$2.46M	0.01%	–	–
ProShare Advisors LLC	18,818	$2.55M	0.01%	–	–
BNP Paribas Arbitrage, SA	18,825	$2.55M	0.01%	–	–
Brinker Capital Investments, LLC	19,021	$2.58M	0.04%	–	–
Ameritas Investment Partners, Inc.	19,313	$2.62M	0.10%	–	–
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%	–	–
Great West Life Assurance Co	21,329	$2.89M	0.01%	–	–
Stifel Financial Corp	21,491	$2.92M	0.00%	–	–
Teachers Retirement System of the State of Kentucky	22,916	$3.11M	0.03%	–	–
Metropolitan Life Insurance Co	23,443	$3.18M	0.05%	–	–
SG Americas Securities, LLC	25,846	$3.51M	0.02%	–	–
Kennedy Capital Management, Inc.	26,138	$3.55M	0.07%	–	–
Catalyst Capital Advisors LLC	26,305	$3.57M	0.20%	–	–
Formula Growth Ltd	27,500	$3.73M	0.54%	–	–
Nisa Investment Advisors, LLC	27,635	$3.75M	0.02%	–	–
Cookson Peirce & Co Inc	27,684	$3.76M	0.25%	–	–
Fisher Asset Management, LLC	27,790	$3.77M	0.00%	–	–
Ashfield Capital Partners, LLC	28,299	$3.84M	0.31%	–	–
Balyasny Asset Management LLC	28,650	$3.89M	0.02%	–	–
Two Sigma Advisers, LP	29,500	$4.00M	0.01%	–	–
South Dakota Investment Council	30,444	$4.13M	0.07%	–	–
Waddell & Reed Financial Inc	30,969	$4.20M	0.01%	–	–
Bridge City Capital, LLC	30,982	$4.21M	1.39%	–	–
Comerica Bank	31,801	$4.26M	0.03%	–	–
PDT Partners, LLC	31,500	$4.28M	0.31%	–	–
Millennium Management LLC	31,647	$4.29M	0.01%	–	–
Thrivent Financial for Lutherans	32,108	$4.36M	0.01%	–	–
McKinley Capital Management LLC /Delaware	32,733	$4.44M	0.33%	–	–
HighTower Advisors, LLC	34,045	$4.59M	0.01%	–	–
State of New Jersey Common Pension Fund D	34,719	$4.71M	0.02%	–	–
Susquehanna Fundamental Investments, LLC	35,250	$4.78M	0.08%	–	–
D. E. Shaw & Co., Inc.	35,828	$4.86M	0.01%	–	–
Rice Hall James & Associates, LLC	36,189	$4.91M	0.16%	–	–
Granahan Investment Management Inc	36,721	$4.98M	0.11%	–	–
Advisors Asset Management, Inc.	37,772	$5.13M	0.08%	–	–
DekaBank Deutsche Girozentrale	40,000	$5.26M	0.02%	–	–
Crown Advisors Management, Inc.	40,000	$5.43M	4.25%	–	–
LPL Financial LLC	40,030	$5.43M	0.01%	–	–
Asset Management One Co.,Ltd.	40,421	$5.49M	0.02%	–	–
Texas Permanent School Fund	40,514	$5.50M	0.07%	–	–
Ensign Peak Advisors, Inc	42,491	$5.77M	0.01%	–	–
Marks Group Wealth Management, Inc	44,361	$6.02M	0.89%	–	–
Barclays PLC	45,848	$6.22M	0.01%	–	–
Running Oak Capital LLC	46,430	$6.30M	1.92%	–	–
MetLife Investment Management	48,266	$6.55M	0.06%	–	–
Pembroke Management, LTD	50,196	$6.81M	0.57%	–	–
Voya Investment Management LLC	51,003	$6.92M	0.01%	–	–
Russell Investments Group, Ltd.	53,179	$7.21M	0.01%	–	–
AXA S.A.	53,746	$7.29M	0.02%	–	–
UBS Group AG	54,089	$7.34M	0.00%	–	–
Envestnet Asset Management Inc	57,596	$7.82M	0.01%	–	–
Renaissance Investment Group LLC	61,567	$8.36M	2.30%	–	–
Zacks Investment Management	69,363	$9.41M	0.17%	–	–
Bahl & Gaynor Inc	69,422	$9.42M	0.06%	–	–
Retirement Systems of Alabama	70,781	$9.61M	0.04%	–	–
Glenmede Trust Co NA	73,864	$10.0M	0.05%	–	–
Prudential Financial Inc	76,214	$10.3M	0.02%	–	–
New York State Teachers Retirement System	78,023	$10.6M	0.02%	–	–
Segall Bryant & Hamill, LLC	79,851	$10.8M	0.11%	–	–
S&T Bank	80,086	$10.9M	1.79%	–	–
Sandler Capital Management	80,174	$10.9M	1.04%	–	–
California State Teachers Retirement System	81,395	$11.0M	0.01%	–	–
Putnam Investments LLC	84,055	$11.4M	0.02%	–	–
Smith, Graham & Co., Investment Advisors, LP	84,786	$11.5M	0.93%	–	–
Franklin Resources Inc	87,456	$11.9M	0.00%	–	–
Legal & General Group Plc	88,186	$12.0M	0.00%	–	–
Agf Investments Inc.	88,299	$12.0M	0.09%	–	–
Manufacturers Life Insurance Company, The	89,689	$12.2M	0.01%	–	–
Mutual of America Capital Management LLC	90,427	$12.3M	0.13%	–	–
Trillium Asset Management, LLC	90,904	$12.3M	0.39%	–	–