Security key
26818M108
Dyne Therapeutics, Inc. - COMMON STOCK, $0.0001 PAR VALUE (DYN)
CUSIP: 26818M108
Q2 2025 13F Holders as of 30 Jun 2025
- Security type / class
- Equity / COMMON STOCK, $0.0001 PAR VALUE
- Total 13F shares
- 128,553,808
- Total 13F value
- $1,223,875,095
- Share change
- +6,583,762
- Put/Call ratio
- 204%
- SEC-reported price per share
- $9.52
- Number of holders
- 195
- Value change
- +$58,226,785
- Number of buys
- 117
- Number of sells
- 83
- Shares outstanding
- 186,643,708
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2025
Institutions
195
Top holders
10
DYN full security history
Ownership snapshot
Full 13F holder table
Dyne Therapeutics, Inc. SEC filings
Dyne Therapeutics, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of DYN - Dyne Therapeutics, Inc. - COMMON STOCK, $0.0001 PAR VALUE (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Forbion Capital Fund IV C...
Disclosed value leader
Janus Henderson Group Ltd.
Comparable rows
15/15
Latest evidence
31 Mar 2025
13D/G
13F
Lead comparable stake: 4.8%
13D/G row: Forbion Capital Fund IV Cooperatief U.A.
Showing 1-6 of 15 holder rows.
Quick read
Forbion Capital Fund IV Cooperatief U.A. leads the comparable SEC ownership view at 4.8%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Forbion Capital Fund IV Cooperatief U.A.'s linked filing trail.
Comparable ownership
Top 5
Forbion Capital Fund IV Cooperati...
4.8%
RTW INVESTMENTS, LP
1.5%
Point72 Asset Management, L.P.
1.5%
Janus Henderson Group Ltd.
5.5%
RA CAPITAL MANAGEMENT, L.P.
5.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Forbion Capital Fund IV Cooperatief U.A. |
13D/G
ForDyne B.V.
|
4.8%
|
$60,000,055
5,400,545 shares
|
$0 | 31 Mar 2025 |
| RTW INVESTMENTS, LP |
13D/G
13F
Company
|
1.5%
|
$18,782,199
1,690,567 shares
|
-$39,196,902 | 31 Mar 2025 |
| Point72 Asset Management, L.P. |
13D/G
13F
Company
|
1.5%
|
$18,546,390
1,669,342 shares
|
-$39,187,803 | 31 Mar 2025 |
| Janus Henderson Group Ltd. |
13F
Company
|
5.5%
|
$118,465,941
10,353,416 shares
|
— | 31 Mar 2025 |
| RA CAPITAL MANAGEMENT, L.P. |
13F
Company
|
5.2%
|
$101,612,540
9,714,392 shares
|
— | 31 Mar 2025 |
| Atlas Venture Life Science Advisors, LLC |
13F
Company
|
4.9%
|
$95,504,664
9,130,465 shares
|
— | 31 Mar 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
195
Shares
128,553,808
Rows available
195
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
202
Q2 2025 holders
195
Holder diff
-7
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|