Who owns Disc Medicine, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of IRON from SEC Form 13F filings across 216 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 216 institutions disclosed 42.8M shares of Disc Medicine, Inc. worth $3.13B — about 110.5% of shares outstanding; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
216
13F holders
$3.13B
value, 2026 filers
110.5%
of shares outstanding (42.8M sh)
38
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of IRON's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 4.9M | $358.0M | 0.0% | 12.7% | -12.4% |
| 2 | BlackRock, Inc. | 2.5M | $180.5M | 0.0% | 6.4% | +8.5% |
| 3 | RA CAPITAL MANAGEMENT, L.P. | 2.5M | $179.2M | 1.6% | 6.3% | 0.0% |
| 4 | JPMORGAN CHASE & CO | 1.9M | $139.9M | 0.0% | 4.8% | +36.8% |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.9M | $137.2M | 0.0% | 4.8% | +21.0% |
| 6 | WELLINGTON MANAGEMENT GROUP LLP | 1.7M | $127.4M | 0.0% | 4.5% | +0.3% |
| 7 | STATE STREET CORP | 1.6M | $120.6M | 0.0% | 4.3% | -2.9% |
| 8 | Vestal Point Capital, LP | 1.6M | $113.4M | 2.6% | 4% | +121.4% |
| 9 | Atlas Venture Life Science Advisors, LLC | 1.5M | $110.7M | 12.6% | 3.9% | 0.0% |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 1.4M | $100.1M | 0.0% | 3.5% | -0.5% |
| 11 | Frazier Life Sciences Management, L.P. | 1.4M | $99.1M | 2.2% | 3.5% | 0.0% |
| 12 | TCG Crossover Management, LLC | 1.3M | $98.1M | 2.4% | 3.5% | 0.0% |
| 13 | BVF INC/IL | 1.2M | $84.4M | 2.2% | 3% | -9.3% |
| 14 | Woodline Partners LP | 958,281 | $70.1M | 0.2% | 2.5% | 0.0% |
| 15 | Siren, L.L.C. | 888,401 | $65.0M | 1.3% | 2.3% | -10.1% |
| 16 | Logos Global Management LP | 875,000 | $64.0M | 2.8% | 2.3% | +56.3% |
| 17 | Opaleye Management Inc. | 855,000 | $62.5M | 5.7% | 2.2% | +103.1% |
| 18 | GEODE CAPITAL MANAGEMENT, LLC | 789,724 | $57.8M | 0.0% | 2% | +6.1% |
| 19 | DEERFIELD MANAGEMENT COMPANY, L.P. | 657,000 | $48.1M | 0.5% | 1.7% | 0.0% |
| 20 | DIMENSIONAL FUND ADVISORS LP | 569,018 | $41.6M | 0.0% | 1.5% | +44.3% |
| 21 | Bellevue Group AG | 560,000 | $41.0M | 0.9% | 1.4% | +21.9% |
| 22 | Saturn V Capital Management LP | 524,730 | $38.4M | 5.5% | 1.4% | +16.6% |
| 23 | ARMISTICE CAPITAL, LLC | 460,000 | $33.6M | 0.4% | 1.2% | -14.2% |
| 24 | JENNISON ASSOCIATES LLC | 439,520 | $32.1M | 0.0% | 1.1% | -28.0% |
| 25 | Aberdeen Group plc | 438,174 | $32.0M | 0.0% | 1.1% | +16.7% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.