Cullinan Therapeutics, Inc.: which funds bought and sold

Institutions that bought and sold Cullinan Therapeutics 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, 111 institutions that filed 13F reports for both quarters added to or opened positions in Cullinan Therapeutics, and 67 cut or closed them. Together they added a net 6.1M shares, +9.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 950K shares (+6.7%); index fund managers were net buyers of 2.6M shares (+20.2%). 29 opened a new position and 20 sold out entirely.

Bought, Q2 2026 111 institutions, 29 of them new holders Sold, Q2 2026 67 institutions, 20 of them sold out

Net change, all compared +6.1M shares (+9.4%)

Net change, active managers +950K shares (+6.7%), 24 bought, 20 sold

Buyers versus sellers

institutions compared, 199

111 bought 21 67 sold

Active managers and hedge funds 24 bought · 20 sold · +950K

Index fund managers 9 bought · 2 sold · +2.6M

Other institutions 78 bought · 45 sold · +2.6M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Mpm Bioimpact LLC	+2.1M +27.2%	9.7M	$177M
Price T Rowe Associates Inc Active manager	+1.8M +88.5%	3.8M	$69.7M
State Street Corp Index funds	+1.1M +44.2%	3.7M	$66.8M
Blackrock, Inc. Index funds	+783K +17.6%	5.2M	$95.3M
Boone Capital Management LLC	+704K New position	704K	$12.8M
Siren, L.L.C.	+700K +58.7%	1.9M	$34.5M
RTW Investments, LP Hedge fund	+658K +38.6%	2.4M	$43.1M
Goldman Sachs Group Inc	+546K +119.9%	1.0M	$18.2M
Perceptive Advisors LLC Hedge fund	+426K New position	426K	$7.8M
Adage Capital Partners Gp, L.L.C. Hedge fund	+238K New position	238K	$4.3M
FMR LLC Active manager	+233K +3220.2%	240K	$4.4M
AQR Capital Management LLC Hedge fund	+220K +61.1%	581K	$10.6M
Vanguard Portfolio Management LLC Index funds	+186K +33.7%	739K	$13.5M
Geode Capital Management, LLC Index funds	+179K +13.1%	1.5M	$28.2M
Squarepoint Ops LLC Hedge fund	+168K New position	168K	$3.1M
Elmind Capital, LP	+160K +30.2%	690K	$12.6M
Bleichroeder LP	+150K +150.0%	250K	$4.6M
Citadel Advisors LLC Hedge fund	+145K +57.2%	397K	$7.2M
Dimensional Fund Advisors LP	+141K +15.5%	1.0M	$19.1M
Vanguard Capital Management LLC Index funds	+131K +5.3%	2.6M	$47.6M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Price T Rowe Associates Inc Active manager	+1.8M +88.5%	3.8M	$69.7M
RTW Investments, LP Hedge fund	+658K +38.6%	2.4M	$43.1M
Perceptive Advisors LLC Hedge fund	+426K New position	426K	$7.8M
Adage Capital Partners Gp, L.L.C. Hedge fund	+238K New position	238K	$4.3M
FMR LLC Active manager	+233K +3220.2%	240K	$4.4M
AQR Capital Management LLC Hedge fund	+220K +61.1%	581K	$10.6M
Squarepoint Ops LLC Hedge fund	+168K New position	168K	$3.1M
Citadel Advisors LLC Hedge fund	+145K +57.2%	397K	$7.2M
Engineers Gate Manager LP Hedge fund	+87K +130.9%	153K	$2.8M
Moore Capital Management, LP Hedge fund	+84K +79.3%	190K	$3.5M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Nextech Invest Ltd.	−1.1M Sold out	0	—
Marshall Wace, LLP Hedge fund	−984K −93.7%	66K	$1.2M
Point72 Asset Management, L.P. Hedge fund	−830K −91.7%	75K	$1.4M
Deerfield Management Company, L.P. Hedge fund	−386K Sold out	0	—
Blue Owl Capital Holdings LP	−370K −19.4%	1.5M	$28M
Soleus Capital Management, L.P. Hedge fund	−360K −87.8%	50K	$910,500
Nuveen, LLC	−334K −41.4%	472K	$8.6M
Two Sigma Investments, LP Hedge fund	−249K −47.8%	273K	$5M
Orbimed Advisors LLC	−243K Sold out	0	—
Schroder Investment Management Group Active manager	−174K Sold out	0	—
Longaeva Partners L.P.	−119K −64.7%	65K	$1.2M
Invesco Ltd.	−101K −41.2%	144K	$2.6M
Cinctive Capital Management LP Hedge fund	−94K Sold out	0	—
Algert Global LLC Hedge fund	−73K −66.4%	37K	$671,057
Qube Research & Technologies Ltd Hedge fund	−70K −77.9%	20K	$363,035
Superstring Capital Management LP	−59K Sold out	0	—
Jump Financial, LLC	−55K −28.4%	139K	$2.5M
ADAR1 Capital Management, LLC Hedge fund	−50K Sold out	0	—
Gsa Capital Partners LLP	−43K Sold out	0	—
HRT Financial LP	−39K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	−984K −93.7%	66K	$1.2M
Point72 Asset Management, L.P. Hedge fund	−830K −91.7%	75K	$1.4M
Deerfield Management Company, L.P. Hedge fund	−386K Sold out	0	—
Soleus Capital Management, L.P. Hedge fund	−360K −87.8%	50K	$910,500
Two Sigma Investments, LP Hedge fund	−249K −47.8%	273K	$5M
Schroder Investment Management Group Active manager	−174K Sold out	0	—
Cinctive Capital Management LP Hedge fund	−94K Sold out	0	—
Algert Global LLC Hedge fund	−73K −66.4%	37K	$671,057
Qube Research & Technologies Ltd Hedge fund	−70K −77.9%	20K	$363,035
ADAR1 Capital Management, LLC Hedge fund	−50K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Boone Capital Management LLC	704K	$12.8M
Perceptive Advisors LLCHedge fund	426K	$7.8M
Adage Capital Partners Gp, L.L.C.Hedge fund	238K	$4.3M
Squarepoint Ops LLCHedge fund	168K	$3.1M
Martingale Asset Management L PActive manager	62K	$1.1M
Franklin Resources IncActive manager	42K	$771,103
Fisher Asset Management, LLCActive manager	36K	$655,523
Massachusetts Financial Services CoActive manager	32K	$577,494
Exoduspoint Capital Management, LPHedge fund	29K	$519,659
Panagora Asset Management IncActive manager	24K	$444,251

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Nextech Invest Ltd.	1.1M	$16.2M
Deerfield Management Company, L.P.Hedge fund	386K	$5.5M
Orbimed Advisors LLC	243K	$3.5M
Schroder Investment Management GroupActive manager	174K	$2.3M
Cinctive Capital Management LPHedge fund	94K	$1.3M
Superstring Capital Management LP	59K	$845,268
ADAR1 Capital Management, LLCHedge fund	50K	$710,500
Gsa Capital Partners LLP	43K	$616,000
HRT Financial LP	39K	$548,000
Voleon Capital Management LPHedge fund	24K	$342,347

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 183
Ten largest holders: 65.8%
Index fund managers: 21.4%
Active managers and hedge funds: 21.0%

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	24	20	10	7	+950K	+6.7%
Index fund managers	9	2	0	1	+2.6M	+20.2%
Other institutions	78	45	19	12	+2.6M	+6.8%

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 Cullinan Therapeutics.

Only managers that filed a holdings report for both quarters are compared (199 here). 7 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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