Tetra Tech Inc: which funds bought and sold

Institutions that bought and sold Tetra Tech shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 248 institutions that filed 13F reports for both quarters added to or opened positions in Tetra Tech, and 294 cut or closed them. Together they added a net 5.0M shares, +2.0% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 3.1M shares (+5.7%); index fund managers were net buyers of 3.4M shares (+4.7%). 45 opened a new position and 83 sold out entirely.

Bought, Q2 2026 248 institutions, 45 of them new holders Sold, Q2 2026 294 institutions, 83 of them sold out

Net change, all compared +5.0M shares (+2.0%)

Net change, active managers +3.1M shares (+5.7%), 29 bought, 35 sold

Buyers versus sellers

institutions compared, 620

248 bought 78 294 sold

Active managers and hedge funds 29 bought · 35 sold · +3.1M

Index fund managers 6 bought · 5 sold · +3.4M

Other institutions 213 bought · 254 sold · −1.5M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+8.4M +2571.3%	8.8M	$253M
Arrowstreet Capital, Limited Partnership Hedge fund	+3.9M +708.5%	4.4M	$127M
AQR Capital Management LLC Hedge fund	+2.6M +171.5%	4.1M	$117M
Energy Income Partners, LLC	+2.4M New position	2.4M	$68.5M
Blackrock, Inc. Index funds	+1.9M +7.0%	28.7M	$828M
Cooke & Bieler LP Active manager	+1.8M New position	1.8M	$51.6M
Geode Capital Management, LLC Index funds	+1.6M +31.0%	6.8M	$197M
Fuller & Thaler Asset Management, Inc.	+1.6M +48.5%	4.9M	$142M
UBS Group AG	+1.2M +188.9%	1.9M	$54M
Invesco Ltd.	+1.2M +40.3%	4.1M	$119M
Pacer Advisors, Inc.	+838K +1163.4%	910K	$26.3M
Robeco Schweiz AG	+812K +35.5%	3.1M	$89.5M
Goldman Sachs Group Inc	+721K +37.4%	2.6M	$76.5M
Ameriprise Financial Inc	+709K +35.1%	2.7M	$78.9M
Dimensional Fund Advisors LP	+657K +17.3%	4.4M	$128M
Fil Ltd Active manager	+639K +13.2%	5.5M	$158M
PGGM Investments	+621K +49.5%	1.9M	$54.2M
Bank Of America Corp	+607K +44.2%	2.0M	$57.1M
LGT Group Foundation	+583K +18.5%	3.7M	$108M
Gotham Asset Management, LLC Hedge fund	+514K +263.4%	709K	$20.5M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+8.4M +2571.3%	8.8M	$253M
Arrowstreet Capital, Limited Partnership Hedge fund	+3.9M +708.5%	4.4M	$127M
AQR Capital Management LLC Hedge fund	+2.6M +171.5%	4.1M	$117M
Cooke & Bieler LP Active manager	+1.8M New position	1.8M	$51.6M
Fil Ltd Active manager	+639K +13.2%	5.5M	$158M
Gotham Asset Management, LLC Hedge fund	+514K +263.4%	709K	$20.5M
Point72 Asset Management, L.P. Hedge fund	+469K +86.5%	1.0M	$29.2M
Bridgewater Associates, LP Hedge fund	+394K +184.3%	608K	$17.6M
Capital International Investors Active manager	+266K +2.3%	11.7M	$337M
Squarepoint Ops LLC Hedge fund	+225K +53.8%	642K	$18.5M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Sands Capital Management, LLC Active manager	−6.7M Sold out	0	—
Pictet Asset Management Holding SA	−4.9M −50.7%	4.8M	$137M
Fernbridge Capital Management LP	−3.4M Sold out	0	—
Neuberger Berman Group LLC Active manager	−2.9M −39.4%	4.4M	$127M
Alliancebernstein L.P. Active manager	−2.5M −88.1%	335K	$10.1M
Van Berkom & Associates Inc.	−2.1M −46.0%	2.5M	$71.3M
Bessemer Group Inc	−1.3M −92.9%	102K	$2.9M
King Luther Capital Management Corp Active manager	−1.2M −68.1%	569K	$16.4M
Marshall Wace, LLP Hedge fund	−685K −95.1%	35K	$1M
CI Investments Inc.	−462K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−454K Sold out	0	—
Citadel Advisors LLC Hedge fund	−453K −26.0%	1.3M	$37.2M
Quantinno Capital Management LP	−447K −28.8%	1.1M	$31.9M
Rockefeller Capital Management L.P.	−403K −64.3%	224K	$6.5M
Premier Fund Managers Ltd	−397K −49.3%	408K	$11.8M
Ia Global Asset Management Inc.	−390K Sold out	0	—
SEB Asset Management AB	−374K Sold out	0	—
Ninety One Uk Ltd	−366K −13.4%	2.4M	$68.3M
Copeland Capital Management, LLC Active manager	−365K −99.8%	670	$19,355
Aberdeen Group PLC	−353K −24.8%	1.1M	$30.9M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Sands Capital Management, LLC Active manager	−6.7M Sold out	0	—
Neuberger Berman Group LLC Active manager	−2.9M −39.4%	4.4M	$127M
Alliancebernstein L.P. Active manager	−2.5M −88.1%	335K	$10.1M
King Luther Capital Management Corp Active manager	−1.2M −68.1%	569K	$16.4M
Marshall Wace, LLP Hedge fund	−685K −95.1%	35K	$1M
Renaissance Technologies LLC Hedge fund	−454K Sold out	0	—
Citadel Advisors LLC Hedge fund	−453K −26.0%	1.3M	$37.2M
Copeland Capital Management, LLC Active manager	−365K −99.8%	670	$19,355
Baillie Gifford & Co Active manager	−312K −99.6%	1,114	$32,183
Schroder Investment Management Group Active manager	−286K −33.1%	579K	$16.7M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Energy Income Partners, LLC	2.4M	$68.5M
Cooke & Bieler LPActive manager	1.8M	$51.6M
HRT Financial LP	502K	$14.5M
Foresight Group Ltd Liability Partnership	270K	$7.7M
Holocene Advisors, LPHedge fund	162K	$4.7M
Worldquant Millennium Advisors LLCHedge fund	62K	$1.8M
Icon Advisers Inc	60K	$1.7M
Penserra Capital Management LLC	56K	$1.6M
Natixis	38K	$1.1M
Hunter Perkins Capital Management, LLC	28K	$803,000

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Sands Capital Management, LLCActive manager	6.7M	$201M
Fernbridge Capital Management LP	3.4M	$102M
CI Investments Inc.	462K	$13.9M
Renaissance Technologies LLCHedge fund	454K	$13.7M
Ia Global Asset Management Inc.	390K	$11.7M
SEB Asset Management AB	374K	$11.3M
Connor, Clark & Lunn Investment Management Ltd.	349K	$10.5M
Caisse De Depot Et Placement Du Quebec	181K	$5.5M
Night Squared LP	175K	$5.3M
Edgestream Partners, L.P.Hedge fund	122K	$3.7M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 546
Ten largest holders: 41.7%
Index fund managers: 30.3%
Active managers and hedge funds: 22.5%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	29	35	6	10	+3.1M	+5.7%
Index fund managers	6	5	0	0	+3.4M	+4.7%
Other institutions	213	254	39	73	−1.5M	−1.3%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Tetra Tech.

Only managers that filed a holdings report for both quarters are compared (620 here). 20 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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