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DYN in the 13F filings

Dyne Therapeutics Inc · CUSIP 26818M108

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Pharmaceutical preparations
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 10 Feb 2026
Managers listing it
26
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 5 listed it in both
Shares listed
29,074,845
combined, among listed positions
Reported value
$569m
combined, at the quarter end

Among the 92 comparable managers: 15 buyers (opened or added shares) and 14 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -4,084,568.

Managers listing DYN in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

26 of 26 holders

ActionFiling
Janus Henderson Group Ltd13,887,722$272m0.12%Trimmed-857,78317 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)6,569,921$129munder 0.1%Added+1,168,00517 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc2,323,789$45munder 0.1%Added+925,70217 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC1,171,624$23munder 0.1%Trimmed-2,241,81117 Feb 2026 (the filing on sec.gov)
Millennium Management LLC904,389$18munder 0.1%Added+490,44917 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP676,979$13munder 0.1%Trimmed-2,336,39813 Feb 2026 (the filing on sec.gov)
Artisan Partners LP649,691$13munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC470,645$9.2munder 0.1%Added+125,14512 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC432,986$8.5munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP329,345$6.4munder 0.1%Trimmed-1,388,46217 Feb 2026 (the filing on sec.gov)
Squarepoint Ops LLC255,160$5.0munder 0.1%Added+207,56813 Feb 2026 (the filing on sec.gov)
PDT Partners LLC182,986$3.6m0.23%Trimmed-18,25417 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC165,482$3.2munder 0.1%Trimmed-155,94427 Oct 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP157,969$3.1munder 0.1%Added+98,66717 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp147,621$2.9munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Invesco Ltd137,684$2.7munder 0.1%Added+20,12119 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP134,260$2.6munder 0.1%Added+27,58017 Feb 2026 (the filing on sec.gov)
Woodline Partners LP120,788$2.4munder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP98,215$1.9munder 0.1%Trimmed-19,55517 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC70,659$1.4munder 0.1%Trimmed-71,21617 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC70,323$1.4munder 0.1%Trimmed-211,01712 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP47,096$921kunder 0.1%Added+5,18117 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC27,762$543kunder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Winton Group Ltd21,296$417kunder 0.1%Trimmed-56,77611 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC10,453$204kunder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (6)

Exited (4)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
5 in Q3 2024 to 3 in Q2 2026

Tracked managers listing it, at least.

0246202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
DYN by quarter
QuarterHoldersReported valueBuyersSellers
Q3 20203$11mn.a.n.a.
Q4 20201$10mn.a.n.a.
Q1 20211$5.9mn.a.n.a.
Q2 20212$19mn.a.n.a.
Q3 20212$17mn.a.n.a.
Q4 20212$21mn.a.n.a.
Q1 20222$26mn.a.n.a.
Q2 20221$4.6mn.a.n.a.
Q3 20221$19mn.a.n.a.
Q4 20222$17mn.a.n.a.
Q1 20231$432kn.a.n.a.
Q2 20231$4.3mn.a.n.a.
Q3 20231$3.0mn.a.n.a.
Q4 20231$5.8m10
Q1 20244$123m31
Q2 20245$433m50
Q3 20245$392m32
Q4 20246$287m42
Q1 20255$141m42
Q2 20253$94m11
Q3 20255$228m31
Q4 20255$291m1514
Q1 20265$264m1314
Q2 20263$288m1211

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

DYN and LLY →DYN and JNJ →DYN and VRTX →Choose a stock to compare with DYN →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own DYN, latest filings →Back to the 13F Explorer →