Dyne Therapeutics, Inc.

Historical 13F Holders

Symbol: DYN
CUSIP: 26818M108
All holders as of: Q2 2026
Type: Equity
Class: COM

Reported Value, Excluding Options

Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 26818M108 since 12/18/2024, newest first.

Filer	% of Class	Shares	Form	Filed
Atlas Venture Fund XI, L.P. 13G/A Amendment 6	2.4%	4,479,449	13G/A Amendment 6	8/13/2026 Event 6/30/2026
Atlas Venture Fund XI, L.P.	2.4%	4,476,487
Atlas Venture Associates XI, L.P.	2.4%	4,479,449
Atlas Venture Associates XI, LLC	2.4%	4,479,449
Atlas Venture Opportunity Fund I, L.P.	0.5%	975,931
Atlas Venture Associates Opportunity I, L.P.	0.5%	975,931
Atlas Venture Associates Opportunity I, LLC	0.5%	975,931
Atlas Venture Opportunity Fund II, L.P.	0.7%	1,344,719
Atlas Venture Associates Opportunity II, L.P.	0.7%	1,344,719
Atlas Venture Associates Opportunity II, LLC	0.7%	1,344,719
Janus Henderson Group Ltd. 13G/A Amendment 7	7.3%	11,997,738	13G/A Amendment 7	8/13/2026 Event 6/30/2026
FMR LLC 13G/A Amendment 1	6.8%	11,206,999.89	13G/A Amendment 1	8/6/2026 Event 6/30/2026
FMR LLC	6.8%	11,206,999.89
Abigail P. Johnson	6.8%	11,206,999.89
BlackRock, Inc. 13G/A Amendment 3	7.0%	11,489,504	13G/A Amendment 3	7/28/2026 Event 6/30/2026
T. Rowe Price Investment Management, Inc. 13G/A Amendment 2	18.7%	30,785,801	13G/A Amendment 2	5/15/2026 Event 3/31/2026
Janus Henderson Group PLC 13G/A Amendment 6	8.3%	13,647,376	13G/A Amendment 6	5/15/2026 Event 3/31/2026
FMR LLC 13G	5.4%	8,908,979.89	13G	5/6/2026 Event 3/31/2026
FMR LLC	5.4%	8,908,979.89
Abigail P. Johnson	5.4%	8,908,979.89
Vanguard Group Inc 13G/A Amendment 2	0%	0	13G/A Amendment 2	3/26/2026 Event 3/13/2026
T. Rowe Price Investment Management, Inc. 13G/A Amendment 1	16.2%	26,578,437	13G/A Amendment 1	3/6/2026 Event 2/28/2026
Janus Henderson Group PLC 13G/A Amendment 5	8.5%	13,887,722	13G/A Amendment 5	2/17/2026 Event 12/31/2025
T. Rowe Price Investment Management, Inc. 13G	10.7%	17,540,089	13G	1/8/2026 Event 12/31/2025
Janus Henderson Group PLC 13G/A Amendment 4	10.4%	14,745,505	13G/A Amendment 4	11/14/2025 Event 9/30/2025
RA Capital Management, L.P. 13G/A Amendment 3	0%	0	13G/A Amendment 3	11/14/2025 Event 9/30/2025
RA Capital Management, L.P.	0%	0
Peter Kolchinsky	0%	0
Rajeev Shah	0%	0
RA Capital Healthcare Fund, L.P.	0%	0
Atlas Venture Fund XI, L.P. 13G/A Amendment 5	4.0%	5,713,470	13G/A Amendment 5	11/13/2025 Event 9/30/2025
Atlas Venture Fund XI, L.P.	4.0%	5,697,508
Atlas Venture Associates XI, L.P.	4.0%	5,713,470
Atlas Venture Associates XI, LLC	4.0%	5,713,470
Atlas Venture Opportunity Fund I, L.P.	1.0%	1,458,568
Atlas Venture Associates Opportunity I, L.P.	1.0%	1,458,568
Atlas Venture Associates Opportunity I, LLC	1.0%	1,458,568
Atlas Venture Opportunity Fund II, L.P.	1.4%	1,958,427
Atlas Venture Associates Opportunity II, LP	1.4%	1,958,427
Atlas Venture Associates Opportunity II, LLC	1.4%	1,958,427
Janus Henderson Group PLC 13G/A Amendment 3	10.1%	14,394,999	13G/A Amendment 3	8/7/2025 Event 7/31/2025
RA Capital Management, L.P. 13G/A Amendment 2	8.5%	9,714,392	13G/A Amendment 2	5/15/2025 Event 3/31/2025
RA Capital Management, L.P.	8.5%	9,714,392
Peter Kolchinsky	8.5%	9,714,392
Rajeev Shah	8.5%	9,714,392
RA Capital Healthcare Fund, L.P.	8.5%	9,714,392
Forbion Capital Fund IV Cooperatief U.A. 13G/A Amendment 2	4.8%	5,400,545	13G/A Amendment 2	5/15/2025 Event 3/31/2025
ForDyne B.V.	4.8%	5,400,545
Forbion Capital Fund IV Cooperatief U.A.	3.6%	4,036,476
Forbion IV Management B.V.	3.6%	4,036,476
Forbion Growth Opportunities Fund II Cooperatief U.A.	1.3%	1,426,370
Forbion Growth II Management B.V.	1.3%	1,426,370
RTW Investments, LP 13G/A Amendment 2	1.5%	1,690,567	13G/A Amendment 2	5/15/2025 Event 3/31/2025
RTW Investments, LP	1.5%	1,690,567
Roderick Wong, M.D.	1.5%	1,690,567
Point72 Asset Management, L.P. 13G/A Amendment 1	1.5%	1,669,342	13G/A Amendment 1	5/15/2025 Event 3/31/2025
Point72 Asset Management, L.P.	1.5%	1,669,342
Point72 Capital Advisors, Inc.	1.5%	1,669,342
Steven A. Cohen	1.5%	1,669,342
Janus Henderson Group PLC 13G/A Amendment 2	9.2%	10,353,875	13G/A Amendment 2	5/14/2025 Event 3/31/2025
FMR LLC 13G/A Amendment 2	4.6%	5,195,294	13G/A Amendment 2	5/12/2025 Event 3/31/2025
FMR LLC	4.6%	5,195,294
Abigail P. Johnson	4.6%	5,195,294
BlackRock, Inc. 13G/A Amendment 2	5.8%	6,577,879	13G/A Amendment 2	4/17/2025 Event 3/31/2025
Janus Henderson Group PLC 13G/A Amendment 1	7.3%	7,379,309	13G/A Amendment 1	2/14/2025 Event 12/31/2024
RTW Investments, LP 13G/A Amendment 1	5.1%	5,218,641	13G/A Amendment 1	2/14/2025 Event 12/31/2024
RTW Investments, LP	5.1%	5,218,641
Roderick Wong, M.D.	5.1%	5,218,641
FMR LLC 13G/A Amendment 1	7.9%	7,996,931	13G/A Amendment 1	2/12/2025 Event 12/31/2024
FMR LLC	7.9%	7,996,931
Abigail P. Johnson	7.9%	7,996,931
Point72 Asset Management, L.P. 13G	5.1%	5,196,597	13G	2/3/2025 Event 1/31/2025
Point72 Asset Management, L.P.	5.1%	5,196,597
Point72 Capital Advisors, Inc.	5.1%	5,196,597
Steven A. Cohen	5.1%	5,196,597

13F Holders by Quarter

Period	Filings	Shares, Excl. Options	Value, Excl. Options	Options Value
2026 Q3	4	3.04 k	$48.9 k	$0
2026 Q2	255	194 M	$4.37 B	$5.28 M
2026 Q1	238	188 M	$3.41 B	$5.05 M
2025 Q4	245	181 M	$3.54 B	$11.7 M
2025 Q3	219	159 M	$2.01 B	$5.40 M
2025 Q2	205	129 M	$1.23 B	$1.05 M
2025 Q1	213	122 M	$1.29 B	$4.06 M
2024 Q4	209	112 M	$2.63 B	$13.0 M
2024 Q3	210	113 M	$4.04 B	$17.0 M
2024 Q2	204	113 M	$3.97 B	$3.79 M
2024 Q1	182	97.4 M	$2.76 B	$9.62 M
2023 Q4	142	74.3 M	$989 M	$21.6 M
2023 Q3	121	59.9 M	$537 M	$3.05 M
2023 Q2	122	59.2 M	$666 M	$223 k
2023 Q1	132	54.7 M	$629 M	$172 k
2022 Q4	118	50.3 M	$583 M	$874 k
2022 Q3	106	45.3 M	$576 M	$469 k
2022 Q2	91	46.7 M	$321 M	$0
2022 Q1	96	47.7 M	$457 M	$0
2021 Q4	95	47.8 M	$568 M	$0
2021 Q3	84	35.3 M	$573 M	$0
2021 Q2	77	35.8 M	$753 M	$0
2021 Q1	76	34.3 M	$533 M	$0
2020 Q4	70	29.3 M	$615 M	$0
2020 Q3	51	27.5 M	$554 M	$0