DYN Dyne Therapeutics, Inc.

NASDAQ
$18.21

Dyne Therapeutics, Inc. (DYN) Institutional Ownership

What the institutions did with DYN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers compared
269
filed both this quarter and last
Managers holding
241
+15 on the quarter
Buyers
132
43 opened new
Sellers
104
28 sold out entirely
Buyer share
55.9%
of managers who traded it
Breadth
+11.9
net buyers, as a share of those trading

Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
T. Rowe Price Investment Management, Inc. 30.9M 16.2%
BlackRock, Inc. 12.4M 6.5%
Jupiter Topco LLC 12.0M 6.3%
FMR LLC 11.2M 5.9%
STATE STREET CORP 7.5M 3.9%
Orbis Allan Gray Ltd 7.0M 3.7%
Atlas Venture Life Science Advisors, LLC 6.8M 3.6%
VANGUARD CAPITAL MANAGEMENT LLC 6.3M 3.3%
TCG Crossover Management, LLC 4.6M 2.4%
VANGUARD PORTFOLIO MANAGEMENT LLC 4.0M 2.1%
PRICE T ROWE ASSOCIATES INC /MD/ 3.9M 2.1%
FCPM III SERVICES B.V. 3.8M 2.0%
GEODE CAPITAL MANAGEMENT, LLC 3.7M 2.0%
Vestal Point Capital, LP 3.4M 1.8%
ORBIMED ADVISORS LLC 3.2M 1.7%
Frazier Life Sciences Management, L.P. 3.2M 1.7%
JPMORGAN CHASE & CO 3.2M 1.7%
ARMISTICE CAPITAL, LLC 3.1M 1.6%
PERCEPTIVE ADVISORS LLC 2.7M 1.4%
Logos Global Management LP 2.6M 1.3%
BANK OF AMERICA CORP /DE/ 2.2M 1.2%
Venrock Adviser, LLC 2.2M 1.1%
GOLDMAN SACHS GROUP INC 2.2M 1.1%
Siren, L.L.C. 2.1M 1.1%
FRANKLIN RESOURCES INC 2.0M 1.1%

Largest changes

Manager Action Previous Current Change
Atlas Venture Life Science Advisors, LLC Reduced 9.1M 6.8M -2.3M
FMR LLC Increased 8.9M 11.2M +2.3M
PERCEPTIVE ADVISORS LLC Reduced 4.7M 2.7M -2.0M
PRICE T ROWE ASSOCIATES INC /MD/ Increased 2.3M 3.9M +1.6M
MARSHALL WACE, LLP Increased 83.1K 1.5M +1.4M
Logos Global Management LP Increased 1.4M 2.6M +1.2M
STEMPOINT CAPITAL LP Sold Out 1.0M 0 -1.0M
DIMENSIONAL FUND ADVISORS LP Increased 951.6K 1.9M +994.9K
NOVO HOLDINGS A/S New 0 960.4K +960.4K
CITADEL ADVISORS LLC Increased 201.1K 1.1M +942.8K
ADAGE CAPITAL PARTNERS GP, L.L.C. Reduced 1.0M 150.0K -850.0K
STATE STREET CORP Increased 6.7M 7.5M +804.5K
FCPM III SERVICES B.V. Reduced 4.6M 3.8M -796.1K
BANK OF AMERICA CORP /DE/ Increased 1.4M 2.2M +790.1K
BRAIDWELL LP Reduced 1.7M 921.6K -760.4K
BlackRock, Inc. Increased 11.7M 12.4M +704.5K
Vestal Point Capital, LP Reduced 4.0M 3.4M -625.0K
Fiera Capital Corp Reduced 1.4M 790.0K -590.6K
Squarepoint Ops LLC Reduced 834.2K 300.1K -534.1K
MPM BIOIMPACT LLC Increased 1.4M 1.9M +513.9K
Deep Track Capital, LP Reduced 2.0M 1.5M -500.0K
GOLDMAN SACHS GROUP INC Increased 1.7M 2.2M +434.1K
Granahan Investment Management, LLC New 0 338.6K +338.6K
Nuveen, LLC Reduced 718.3K 386.8K -331.5K
ORBIMED ADVISORS LLC Increased 2.9M 3.2M +317.8K
ArrowMark Colorado Holdings LLC Reduced 673.9K 397.2K -276.7K
MILLENNIUM MANAGEMENT LLC Increased 158.5K 431.9K +273.3K
Qube Research & Technologies Ltd Sold Out 253.2K 0 -253.2K
Alyeska Investment Group, L.P. New 0 245.3K +245.3K
Orbis Allan Gray Ltd Increased 6.8M 7.0M +244.3K
GEODE CAPITAL MANAGEMENT, LLC Increased 3.5M 3.7M +239.3K
MOORE CAPITAL MANAGEMENT, LP Increased 78.8K 305.8K +227.0K
Ensign Peak Advisors, Inc Reduced 496.6K 289.7K -206.9K
PDT Partners, LLC Sold Out 183.0K 0 -183.0K
MORGAN STANLEY Reduced 929.0K 746.2K -182.8K
RENAISSANCE TECHNOLOGIES LLC Reduced 533.6K 360.6K -173.0K
University of Wisconsin Foundation Reduced 484.7K 313.6K -171.2K
SAMLYN CAPITAL, LLC Reduced 1.9M 1.8M -167.8K
ALPS ADVISORS INC New 0 167.1K +167.1K
AXXCESS WEALTH MANAGEMENT, LLC New 0 155.3K +155.3K
Burkehill Global Management, LP Sold Out 155.0K 0 -155.0K
CITIGROUP INC Increased 37.8K 187.9K +150.1K
Neo Ivy Capital Management Reduced 168.8K 31.4K -137.3K
AMERIPRISE FINANCIAL INC Increased 163.0K 298.3K +135.3K
Schonfeld Strategic Advisors LLC New 0 134.8K +134.8K
T. Rowe Price Investment Management, Inc. Increased 30.8M 30.9M +126.5K
RAYMOND JAMES FINANCIAL INC Increased 451.6K 576.4K +124.7K
Jain Global LLC New 0 116.3K +116.3K
VANGUARD PORTFOLIO MANAGEMENT LLC Reduced 4.2M 4.0M -113.6K
Aberdeen Group plc Increased 1.4M 1.5M +109.1K
JPMORGAN CHASE & CO Reduced 3.3M 3.2M -101.8K
Siren, L.L.C. Reduced 2.2M 2.1M -100.0K
Tetragon Partners GP Ltd Increased 258.1K 356.7K +98.5K
Man Group plc Sold Out 95.7K 0 -95.7K
VANGUARD CAPITAL MANAGEMENT LLC Reduced 6.4M 6.3M -94.1K
Y-Intercept (Hong Kong) Ltd Increased 65.2K 156.2K +91.0K
Saturn V Capital Management LP Increased 966.6K 1.1M +90.9K
ARMISTICE CAPITAL, LLC Reduced 3.2M 3.1M -87.9K
VOYA INVESTMENT MANAGEMENT LLC Increased 86.6K 174.5K +87.8K
FIDEURAM - INTESA SANPAOLO PRIVATE BANKING S.P.A. New 0 87.1K +87.1K

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.