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DYN · Dyne Therapeutics, Inc. · Shareholders & Ownership

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$16.27 +1.04 (+6.83%) At close · Oct 20
Market Cap
$3.04B
Shares
186.75M
Volume · Oct 20 3.41M Avg daily vol (3M) 2.98M

Every disclosed holder of DYN in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns DYN

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group Shares % Out
Institutional (13F) 190,410,212 101.96%
Insiders (Forms 3, 4, 5) 5,171,646 2.77%
13D/G-only blocks 16,691,206 8.94%
Remaining 25,526,633 -13.67%
Registered funds (N-PORT, not summed) 72,140,974 38.63%

Shares outstanding: 186,746,431, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of DYN

# Holder Shares
1
T. Rowe Price Investment Management, Inc.
13F CIK 1897612 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
30,912,287
2
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
12,404,330
2.1
BlackRock, Inc.
13G CIK 2012383 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
11,489,504
2.2
iShares Russell 2000 ETF
Fund S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
3,550,251
2.3
iShares Biotechnology ETF
Fund S000004350 · Registered fund · Jun 30, 2026
iShares Trust, not summed
935,489
2.4
iShares Russell 2000 Value ETF
Fund S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
833,710
2.5
iShares Russell 2000 Growth ETF
Fund S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
437,890
3
Jupiter Topco LLC
13F CIK 2146052 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
11,997,738
3.1
JANUS HENDERSON GROUP PLC
13G CIK 1274173 · Investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
11,997,738
3.2
Janus Henderson Small Cap Value Fund
Fund S000010480 · Registered fund · Jun 30, 2026
Janus Investment Fund, not summed
171,905
4
FMR LLC
13F CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
11,207,000
4.1
FMR LLC
13G CIK 315066 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
11,206,999
4.2
Fidelity Growth Company Fund
Fund S000007119 · Registered fund · May 31, 2026
Fidelity Mt. Vernon Street Trust, not summed
2,862,005
4.3
Select Biotechnology Portfolio
Fund S000007486 · Registered fund · May 31, 2026
Fidelity Select Portfolios, not summed
1,883,544
4.4
Fidelity Small Cap Index Fund
Fund S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
1,656,555
4.5
Fidelity Growth Company K6 Fund
Fund S000065696 · Registered fund · May 31, 2026
Fidelity Mt. Vernon Street Trust, not summed
793,272
5
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
7,458,263
5.1
State Street(R) SPDR(R) S&P(R) Biotech ETF
Fund S000010018 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
4,152,258
5.2
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
47,100
5.3
State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF
Fund S000036082 · Registered fund · Jun 30, 2026
SPDR INDEX SHARES FUNDS, not summed
6,941
5.4
State Street Total Return V.I.S. Fund
Fund S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
3,444
5.5
State Street Balanced Index Fund
Fund S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
735
6
Orbis Allan Gray Ltd
13F CIK 1663865 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
7,006,542
7
Atlas Venture Life Science Advisors, LLC
13F CIK 1917529 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
6,800,099
8
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
6,310,969
9
ForDyne B.V.
13G CIK 1823747 · Unknown · Mar 31, 2025
Rule 13d-1(d), exempt investor
5,400,545
10
TCG Crossover Management, LLC
13F CIK 1839948 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
4,615,144
11
Atlas Venture Fund XI, L.P.
13G CIK 1708269 · Unknown · Jun 30, 2026
Rule 13d-1(d), exempt investor
4,479,449
12
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
4,471,727
13
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
4,048,428
14
PRICE T ROWE ASSOCIATES INC /MD/
13F CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,936,806
14.1
T. Rowe Price Small-Cap Stock Fund, Inc.
Fund S000002120 · Registered fund · Jun 30, 2026
T. ROWE PRICE SMALL-CAP STOCK FUND, INC., not summed
7,004,602
14.2
T. Rowe Price Small-Cap Value Fund, Inc.
Fund S000002121 · Registered fund · Jun 30, 2026
T. ROWE PRICE SMALL-CAP VALUE FUND, INC., not summed
4,602,629
14.3
T. Rowe Price Institutional Small-Cap Stock Fund
Fund S000002094 · Registered fund · Jun 30, 2026
T. Rowe Price Equity Funds, Inc., not summed
3,809,721
14.4
T. Rowe Price Capital Appreciation Fund
Fund S000002070 · Registered fund · Jun 30, 2026
T. ROWE PRICE CAPITAL APPRECIATION FUND, INC., not summed
3,279,669
14.5
T. Rowe Price New Horizons Fund, Inc.
Fund S000002106 · Registered fund · Jun 30, 2026
T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
1,233,541
15
FCPM III SERVICES B.V.
13F CIK 2013410 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
3,848,256
16
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,743,427
17
Kersten Dirk
Insider CIK 1823682 · Jul 27, 2026
Director, issuer-wide
3,586,796
18
MPM BioVentures 2018 LLC
13G CIK 1729505 · Unknown · Dec 31, 2023
Rule 13d-1(d), exempt investor
3,451,303
19
Vestal Point Capital, LP
13F CIK 1974915 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,375,000
20
ORBIMED ADVISORS LLC
13F CIK 1055951 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,235,684
21
Frazier Life Sciences Management, L.P.
13F CIK 1892134 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,153,082
22
JPMORGAN CHASE & CO
13F CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
3,151,656
23
ARMISTICE CAPITAL, LLC
13F CIK 1601086 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
3,087,226
24
PERCEPTIVE ADVISORS LLC
13F CIK 1224962 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,689,235
25
Logos Global Management LP
13F CIK 1792126 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,550,000
26
Janus Henderson Global Life Sciences Fund
Fund S000010494 · Registered fund · Jun 30, 2026
Janus Investment Fund, not summed
2,272,649
27
BANK OF AMERICA CORP /DE/
13F CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
2,233,398
28
Venrock Adviser, LLC
13F CIK 1615982 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,173,913
29
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
2,157,195
29.1
Goldman Sachs Absolute Return Tracker Fund
Fund S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
240
30
Siren, L.L.C.
13F CIK 2005245 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
2,129,125
31
FRANKLIN RESOURCES INC
13F CIK 38777 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,030,819
31.1
Franklin Biotechnology Discovery Fund
Fund S000006882 · Registered fund · Jul 31, 2026
Franklin Strategic Series, not summed
519,232
31.2
Franklin Small Cap Growth Fund
Fund S000006889 · Registered fund · Jul 31, 2026
Franklin Strategic Series, not summed
478,731
32
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,946,479
32.1
Dimensional U.S. Small Cap ETF
Fund S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
478,626
32.2
U.S. SMALL CAP PORTFOLIO
Fund S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
386,391
32.3
U.S. MICRO CAP PORTFOLIO
Fund S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
352,504
32.4
Dimensional U.S. Core Equity 2 ETF
Fund S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
217,916
32.5
U.S. VECTOR EQUITY PORTFOLIO
Fund S000000982 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
38,006
33
MPM BIOIMPACT LLC
13F CIK 1687078 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,922,093
34
SAMLYN CAPITAL, LLC
13F CIK 1421097 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,754,708
35
RTW INVESTMENTS, LP
13G CIK 1493215 · Registered investment adviser · Mar 31, 2025
Rule 13d-1(b), qualified institution
1,690,567
36
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,690,072
37
Point72 Asset Management, L.P.
13G CIK 1603466 · Registered investment adviser · Mar 31, 2025
Rule 13d-1(c), passive investor
1,669,342
38
Sofinnova Investments, Inc.
13F CIK 1631134 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
1,658,384
39
Palo Alto Investors LP
13F CIK 1306923 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,647,521
40
VANGUARD SMALL-CAP INDEX FUND
Fund S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,609,880
41
Vivo Capital, LLC
13F CIK 1674712 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,557,466
42
Aberdeen Group plc
13F CIK 1716774 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
1,539,434
43
Deep Track Capital, LP
13F CIK 1856083 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,500,000
44
MARSHALL WACE, LLP
13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,488,917
45
Polar Capital Holdings Plc
13F CIK 1837309 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,286,811
46
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,278,081
46.1
Small Cap Index Fund
Fund S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
68,965
46.2
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
12,166
46.3
Small Cap Core Fund
Fund S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
10,250
47
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,202,203
47.1
Schwab U.S. Small-Cap ETF
Fund S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
688,953
47.2
Schwab Small-Cap Index Fund
Fund S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
368,593
47.3
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
100,277
47.4
Schwab U.S. Broad Market ETF
Fund S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
84,436
48
CITADEL ADVISORS LLC
13F CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,143,958
49
Saturn V Capital Management LP
13F CIK 1964437 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,057,493
50
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,020,693

54 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 366 holders

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Key facts CIK 1818794 CUSIP 26818M108 13F (30d) 18 filings 18 filers Visit website Investor relations