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IRON · Disc Medicine, Inc.

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$80.03 -2.52 (-3.05%) At close · Aug 28
Market Cap
$3.17B
Shares
38.39M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 222
Total Value: $3,158,844,199
Total Shares: 43,189,035
Showing 1–100 of 231 holdings by value · page 1 of 3

Institutional Ownership Trend

24 quarters

Holder Concentration

Across 222 13F filers · Δ vs Mar 31, 2026
Top Holder
11.3%
Sep 2023 → Jun 2026 · range 9.2% – 14.4%
−1.9 pts
Top 5
31.4%
Sep 2023 → Jun 2026 · range 31.4% – 44.7%
−1.1 pts
Top 10
49.5%
Sep 2023 → Jun 2026 · range 49.4% – 64.5%
+0.1 pts
HHI
366
Sep 2023 → Jun 2026 · range 366 – 585
Broadly held−30

Quarterly Activity

vs Mar 31, 2026
New
41
Increased
78
Decreased
64
Sold Out
25
Unchanged
39
Holder count: +16
Institutional value: +16.7%
Shares held: +2.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 231
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1816736 CUSIP 254604101 13F (30d) 200 filings 197 filers Visit website Investor relations