Dyne Therapeutics, Inc.: which funds bought and sold

Institutions that bought and sold Dyne 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, 130 institutions that filed 13F reports for both quarters added to or opened positions in Dyne Therapeutics, and 104 cut or closed them. Together they added a net 3.9M shares, +2.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 2.5M shares (+3.1%); index fund managers were net buyers of 1.6M shares (+4.5%). 42 opened a new position and 28 sold out entirely.

Bought, Q2 2026 130 institutions, 42 of them new holders Sold, Q2 2026 104 institutions, 28 of them sold out

Net change, all compared +3.9M shares (+2.2%)

Net change, active managers +2.5M shares (+3.1%), 25 bought, 28 sold

Buyers versus sellers

institutions compared, 267

130 bought 33 104 sold

Active managers and hedge funds 25 bought · 28 sold · +2.5M

Index fund managers 7 bought · 5 sold · +1.6M

Other institutions 98 bought · 71 sold · −241K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+2.3M +25.8%	11.2M	$249M
Price T Rowe Associates Inc Active manager	+1.6M +69.1%	3.9M	$87.4M
Marshall Wace, LLP Hedge fund	+1.4M +1690.7%	1.5M	$33.1M
Logos Global Management LP Hedge fund	+1.1M +82.1%	2.5M	$56.6M
Dimensional Fund Advisors LP	+995K +104.6%	1.9M	$43.2M
Novo Holdings A/S	+960K New position	960K	$21.3M
Citadel Advisors LLC Hedge fund	+943K +468.7%	1.1M	$25.4M
State Street Corp Index funds	+805K +12.1%	7.5M	$166M
Bank Of America Corp	+790K +54.7%	2.2M	$49.6M
Blackrock, Inc. Index funds	+704K +6.0%	12.4M	$276M
Mpm Bioimpact LLC	+514K +36.5%	1.9M	$42.7M
Goldman Sachs Group Inc	+434K +25.2%	2.2M	$47.9M
Granahan Investment Management, LLC	+339K New position	339K	$7.5M
Orbimed Advisors LLC	+318K +10.9%	3.2M	$71.9M
Millennium Management LLC Hedge fund	+273K +172.4%	432K	$9.6M
Alyeska Investment Group, L.P. Hedge fund	+245K New position	245K	$5.4M
Orbis Allan Gray Ltd Active manager	+244K +3.6%	7.0M	$156M
Geode Capital Management, LLC Index funds	+239K +6.8%	3.7M	$83.2M
Moore Capital Management, LP Hedge fund	+227K +288.2%	306K	$6.8M
Alps Advisors Inc	+167K New position	167K	$3.7M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+2.3M +25.8%	11.2M	$249M
Price T Rowe Associates Inc Active manager	+1.6M +69.1%	3.9M	$87.4M
Marshall Wace, LLP Hedge fund	+1.4M +1690.7%	1.5M	$33.1M
Logos Global Management LP Hedge fund	+1.1M +82.1%	2.5M	$56.6M
Citadel Advisors LLC Hedge fund	+943K +468.7%	1.1M	$25.4M
Millennium Management LLC Hedge fund	+273K +172.4%	432K	$9.6M
Alyeska Investment Group, L.P. Hedge fund	+245K New position	245K	$5.4M
Orbis Allan Gray Ltd Active manager	+244K +3.6%	7.0M	$156M
Moore Capital Management, LP Hedge fund	+227K +288.2%	306K	$6.8M
Schonfeld Strategic Advisors LLC Hedge fund	+135K New position	135K	$3M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Atlas Venture Life Science Advisors, LLC	−2.3M −25.5%	6.8M	$151M
Perceptive Advisors LLC Hedge fund	−2.0M −42.4%	2.7M	$59.7M
Stempoint Capital LP	−1.0M Sold out	0	—
Adage Capital Partners Gp, L.L.C. Hedge fund	−850K −85.0%	150K	$3.3M
Fcpm Iii Services B.V.	−796K −17.1%	3.8M	$85.5M
Braidwell LP Hedge fund	−760K −45.2%	922K	$20.5M
Vestal Point Capital, LP Hedge fund	−625K −15.6%	3.4M	$75M
Fiera Capital Corp	−591K −42.8%	790K	$17.5M
Squarepoint Ops LLC Hedge fund	−534K −64.0%	300K	$6.7M
Deep Track Capital, LP Hedge fund	−500K −25.0%	1.5M	$33.3M
Nuveen, LLC	−332K −46.2%	387K	$8.6M
Arrowmark Colorado Holdings LLC	−277K −41.1%	397K	$8.8M
Qube Research & Technologies Ltd Hedge fund	−253K Sold out	0	—
Ensign Peak Advisors, Inc	−207K −41.7%	290K	$6.4M
PDT Partners, LLC Hedge fund	−183K Sold out	0	—
Morgan Stanley	−183K −19.7%	746K	$16.6M
Renaissance Technologies LLC Hedge fund	−173K −32.4%	361K	$8M
University Of Wisconsin Foundation	−171K −35.3%	314K	$7M
Samlyn Capital, LLC Hedge fund	−168K −8.7%	1.8M	$39M
Burkehill Global Management, LP Hedge fund	−155K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Perceptive Advisors LLC Hedge fund	−2.0M −42.4%	2.7M	$59.7M
Adage Capital Partners Gp, L.L.C. Hedge fund	−850K −85.0%	150K	$3.3M
Braidwell LP Hedge fund	−760K −45.2%	922K	$20.5M
Vestal Point Capital, LP Hedge fund	−625K −15.6%	3.4M	$75M
Squarepoint Ops LLC Hedge fund	−534K −64.0%	300K	$6.7M
Deep Track Capital, LP Hedge fund	−500K −25.0%	1.5M	$33.3M
Qube Research & Technologies Ltd Hedge fund	−253K Sold out	0	—
PDT Partners, LLC Hedge fund	−183K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−173K −32.4%	361K	$8M
Samlyn Capital, LLC Hedge fund	−168K −8.7%	1.8M	$39M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Novo Holdings A/S	960K	$21.3M
Granahan Investment Management, LLC	339K	$7.5M
Alyeska Investment Group, L.P.Hedge fund	245K	$5.4M
Alps Advisors Inc	167K	$3.7M
Axxcess Wealth Management, LLC	155K	$3.4M
Schonfeld Strategic Advisors LLCHedge fund	135K	$3M
Jain Global LLCHedge fund	116K	$2.6M
Fideuram - Intesa Sanpaolo Private Banking S.P.A.	87K	$1.9M
D. E. Shaw & Co., Inc.Hedge fund	60K	$1.3M
Handelsbanken Fonder AB	53K	$1.2M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Stempoint Capital LP	1.0M	$18.4M
Qube Research & Technologies LtdHedge fund	253K	$4.6M
PDT Partners, LLCHedge fund	183K	$3.3M
Burkehill Global Management, LPHedge fund	155K	$2.8M
Man Group PLCHedge fund	96K	$1.7M
Tudor Investment Corp Et AlHedge fund	77K	$1.4M
Trexquant Investment LPHedge fund	28K	$501,131
Martingale Asset Management L PActive manager	26K	$465,108
Engineers Gate Manager LPHedge fund	24K	$442,735
Arrowpoint Investment Partners (Singapore) Pte. Ltd.	17K	$312,072

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 245
Ten largest holders: 53.9%
Index fund managers: 19.8%
Active managers and hedge funds: 43.4%

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	25	28	8	12	+2.5M	+3.1%
Index fund managers	7	5	1	0	+1.6M	+4.5%
Other institutions	98	71	33	16	−241K	−0.4%

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 Dyne Therapeutics.

Only managers that filed a holdings report for both quarters are compared (267 here). 9 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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