13F Insight
DOSSIER · 13F Holders · Q1 2026Cheap mega-capRe-rated
IRON

DISC MEDICINE INC

216 institutions still hold DISC MEDICINE INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 254604101·216 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 4.8%
vs prior quarter
13F value held
$1.8B
67.0% inst. owned
of float
Holders
216
-39 QoQ
filers reporting
Activity
+68 / −80
+880 added · −691 reduced
this quarter
Concentration
19.68%
FMR LLC #1
top holder share
AI Holders Summary · Q1 2026

216 institutions reported IRON in Q1 2026. FMR LLC leads at 19.7% of the visible book. -39 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$357M5.6M0.02%Q1 202602
RA CAPITAL MANAGEMENT, L.P.
CIK 0001346824
$157M2.5M1.66%Q1 202603
BlackRock, Inc.
CIK 0002012383
$145M2.3M0.00%Q1 202604
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$111M1.7M0.02%Q1 202605
STATE STREET CORP
CIK 0000093751
$109M1.7M0.00%Q1 202606
Atlas Venture Life Science Advisors, LLC
CIK 0001917529
$97M1.5M12.25%Q1 202607
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$88M1.4M0.00%Q1 202608
Frazier Life Sciences Management, L.P.
CIK 0001892134
$87M1.4M2.23%Q1 202609
TCG Crossover Management, LLC
CIK 0001839948
$86M1.3M2.45%Q1 202610
JPMORGAN CHASE & CO
CIK 0000019617
$83M1.4M0.01%Q1 202611
ORBIMED ADVISORS LLC
CIK 0001055951
$68M1.1M1.36%Q1 202612
Siren, L.L.C.
CIK 0002005245
$63M988K1.75%Q1 202613
Woodline Partners LP
CIK 0001784547
$61M958K0.23%Q1 202614
BVF INC/IL
CIK 0001056807
$52M650K1.74%Q4 202515
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$48M744K0.00%Q1 202616
Vestal Point Capital, LP
CIK 0001974915
$45M700K1.25%Q1 202617
JENNISON ASSOCIATES LLC
CIK 0000053417
$42M532K0.03%Q4 202518
GOLDMAN SACHS GROUP INC
CIK 0000886982
$41M640K0.00%Q1 202619
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 0001009258
$41M511K0.52%Q4 202520
Logos Global Management LP
CIK 0001792126
$36M560K1.79%Q1 2026
Page 1 of 11
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