Adicet Bio, Inc.: which funds bought and sold

Institutions that bought and sold Adicet Bio 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, 31 institutions that filed 13F reports for both quarters added to or opened positions in Adicet Bio, and 15 cut or closed them. Together they sold a net 240K shares, −3.8% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 26K shares (−0.7%); index fund managers were net buyers of 26K shares (+4.5%). 14 opened a new position and 6 sold out entirely.

Bought, Q2 2026 31 institutions, 14 of them new holders Sold, Q2 2026 15 institutions, 6 of them sold out

Net change, all compared −240K shares (−3.8%)

Net change, active managers −26K shares (−0.7%), 11 bought, 3 sold

Buyers versus sellers

institutions compared, 61

31 bought 15 15 sold

Active managers and hedge funds 11 bought · 3 sold · −26K

Index fund managers 3 bought · 2 sold · +26K

Other institutions 17 bought · 10 sold · −241K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Schonfeld Strategic Advisors LLC Hedge fund	+196K New position	196K	$1.7M
Bridgeway Capital Management, LLC Active manager	+86K New position	86K	$742,686
Marshall Wace, LLP Hedge fund	+79K New position	79K	$686,775
Regeneron Pharmaceuticals, Inc.	+61K New position	61K	$522,819
Two Sigma Investments, LP Hedge fund	+54K +124.7%	97K	$836,689
Citadel Advisors LLC Hedge fund	+51K +13.3%	433K	$3.7M
Quadrature Capital Ltd Hedge fund	+36K New position	36K	$312,708
Trexquant Investment LP Hedge fund	+34K +78.6%	78K	$673,937
Jane Street Group, LLC	+33K +90.3%	71K	$609,647
Renaissance Technologies LLC Hedge fund	+33K +14.3%	266K	$2.3M
Blackrock, Inc. Index funds	+26K +69.8%	62K	$536,769
Verdad Advisers, LP	+25K New position	25K	$217,728
Stonepine Capital Management, LLC	+24K +10.6%	246K	$2.1M
Dimensional Fund Advisors LP	+21K +193.2%	32K	$273,049
Susquehanna International Group, LLP	+21K New position	21K	$178,416
Prelude Capital Management, LLC	+19K New position	19K	$160,272
Squarepoint Ops LLC Hedge fund	+15K New position	15K	$131,795
Axq Capital, LP	+11K New position	11K	$94,962
Jump Financial, LLC	+11K New position	11K	$94,539
Vanguard Capital Management LLC Index funds	+6,704 +2.0%	343K	$3M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Schonfeld Strategic Advisors LLC Hedge fund	+196K New position	196K	$1.7M
Bridgeway Capital Management, LLC Active manager	+86K New position	86K	$742,686
Marshall Wace, LLP Hedge fund	+79K New position	79K	$686,775
Two Sigma Investments, LP Hedge fund	+54K +124.7%	97K	$836,689
Citadel Advisors LLC Hedge fund	+51K +13.3%	433K	$3.7M
Quadrature Capital Ltd Hedge fund	+36K New position	36K	$312,708
Trexquant Investment LP Hedge fund	+34K +78.6%	78K	$673,937
Renaissance Technologies LLC Hedge fund	+33K +14.3%	266K	$2.3M
Squarepoint Ops LLC Hedge fund	+15K New position	15K	$131,795
Acadian Asset Management LLC Active manager	+6,694 +5.7%	125K	$1.1M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Woodline Partners LP Hedge fund	−313K Sold out	0	—
Prosight Management, LP	−250K Sold out	0	—
RA Capital Management, L.P. Hedge fund	−250K −21.1%	933K	$8.1M
Orbimed Advisors LLC	−183K −17.8%	845K	$7.3M
ADAR1 Capital Management, LLC Hedge fund	−54K Sold out	0	—
Barclays PLC	−25K Sold out	0	—
UBS Group AG	−8,551 −22.3%	30K	$257,619
Geode Capital Management, LLC Index funds	−5,501 −5.4%	96K	$826,703
Rangeley Capital, LLC	−5,108 −9.1%	51K	$439,707
Newedge Advisors, LLC	−3,854 Sold out	0	—
Fny Investment Advisers, LLC	−3,200 Sold out	0	—
Morgan Stanley	−1,202 −34.4%	2,291	$19,795
Tower Research Capital LLC (TRC)	−1,144 −80.5%	277	$2,393
Northern Trust Corp Index funds	−764 −4.0%	18K	$159,287
Vontobel Holding Ltd.	−471 −3.3%	14K	$119,025

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Woodline Partners LP Hedge fund	−313K Sold out	0	—
RA Capital Management, L.P. Hedge fund	−250K −21.1%	933K	$8.1M
ADAR1 Capital Management, LLC Hedge fund	−54K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Schonfeld Strategic Advisors LLCHedge fund	196K	$1.7M
Bridgeway Capital Management, LLCActive manager	86K	$742,686
Marshall Wace, LLPHedge fund	79K	$686,775
Regeneron Pharmaceuticals, Inc.	61K	$522,819
Quadrature Capital LtdHedge fund	36K	$312,708
Verdad Advisers, LP	25K	$217,728
Susquehanna International Group, LLP	21K	$178,416
Prelude Capital Management, LLC	19K	$160,272
Squarepoint Ops LLCHedge fund	15K	$131,795
Axq Capital, LP	11K	$94,962

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Woodline Partners LPHedge fund	313K	$2.1M
Prosight Management, LP	250K	$1.7M
ADAR1 Capital Management, LLCHedge fund	54K	$366,562
Barclays PLC	25K	$170,250
Newedge Advisors, LLC	3,854	$26,245
Fny Investment Advisers, LLC	3,200	$21,000

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 56
Ten largest holders: 71.4%
Index fund managers: 9.9%
Active managers and hedge funds: 57.5%

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	11	3	6	2	−26K	−0.7%
Index fund managers	3	2	0	0	+26K	+4.5%
Other institutions	17	10	8	4	−241K	−10.8%

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 Adicet Bio.

Only managers that filed a holdings report for both quarters are compared (61 here). 1 other holder is 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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