Companies / Dyne Therapeutics, Inc.

Dyne Therapeutics, Inc.

Nasdaq: DYNCIK 1818794WALTHAM, MA

Financials

Revenue—
Net income$-446.21M
Total debt$199.33M
Cash$676.11M
Diluted EPS$-3.47
Shares outstanding186.7M

Ownership

186.7M shares outstanding · as of Jul 24, 2026
2.9%Insiders
Ownership
Insiders2.95%5,500,318
10%+ / strategic14.23%26,578,437
Institutions85.89%160,392,383
Public float0.00%0

Reported holdings exceed shares outstanding — public float shown as 0; some positions may overlap or lag.

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 8

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Insider% of sharesShares
Kersten DirkDirector
2.49%4,644,386
Cox JohnCEOCEO & President · Director
0.20%374,145
Kerr DouglasChief Medical Officer
0.09%171,606
Friedl-Naderer JohannaChief Commercial Officer
0.08%154,581
Lucera ErickChief Financial Officer
0.07%131,100
Posner Brian SDirector
0.01%24,500
Greene Barry EDirector
——
Hurwitz EdwardDirector
——

Institutional holders 241

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HolderValue% of shares
BlackRock, Inc.$275.50M6.64%
Janus Henderson Group PLC$247.43M7.31%
Vanguard Group Inc$219.38M6.01%
Atlas Venture Life Science Advisors, LLC$178.59M4.89%
State Street Corporation$165.65M3.99%
Fmr LLC$128.51M3.52%
Fcpm III Services B.V.$106.85M2.93%
Orbis Allan Gray Ltd$93.93M2.57%
TCG Crossover Management, LLC$90.27M2.47%
Perceptive Advisors LLC$84.65M2.50%

Activity

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InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Mar 10, 2026Kersten Dirk
Director
SellCommon Stock$5.58M-282K
-5.57%
4,774,058
2.56% of shares
medium
Mar 10, 2026Kersten Dirk
Director
SellCommon Stock$4.25M-220K
-4.17%
5,055,916
2.71% of shares
medium
Mar 9, 2026Kersten Dirk
Director
SellCommon Stock$3.15M-178K
-3.25%
5,285,156
2.83% of shares
medium
Mar 11, 2026Kersten Dirk
Director
SellCommon Stock$2.53M-130K
-2.72%
4,644,386
2.49% of shares
medium
Mar 10, 2026Kersten Dirk
Director
SellCommon Stock$172.7K-9K
-0.18%
5,275,674
2.83% of shares
medium
Mar 6, 2026Posner Brian S
Director
BuyCommon Stock$45.2K+3K
+35.29%
11,500
<0.01% of shares
low
Jun 3, 2026Posner Brian S
Director
BuyCommon Stock$43.7K+3K
+12.50%
22,500
0.01% of shares
low
May 20, 2026Posner Brian S
Director
BuyCommon Stock$42.8K+3K
+16.13%
18,000
<0.01% of shares
low

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Vanguard Group IncPassive13G/A—0—
Janus Henderson Group PLCPassive13G/A———
T. Rowe Price Investment Management, Inc.Passive13G/A—26,578,437—
T. Rowe Price Investment Management, Inc.Passive13G—17,540,089—
Janus Henderson Group PLCPassive13G/A———

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
DYN——26818M108—