Who owns Disc Medicine, Inc.?
Institutional ownership of IRON from SEC Form 13F filings across 138 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.
138
13F holders
$1.47B
value, 2026 filers
57.5%
of shares outstanding (22.1M sh)
25
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 | JPMORGAN CHASE & CO | 1.9M | $139.9M | 0.0% | 4.9% | +36.8% |
| 4 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.9M | $137,168 | 0.0% | 4.9% | +21.0% |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | 1.7M | $127.4M | 0.0% | 4.5% | +0.3% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 1.4M | $100.1M | 0.0% | 3.6% | -50.2% |
| 7 | Woodline Partners LP | 958,281 | $70.1M | 0.2% | 2.5% | -50.0% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 789,724 | $57.8M | 0.0% | 2.1% | +6.1% |
| 9 | JENNISON ASSOCIATES LLC | 439,520 | $32.1M | 0.0% | 1.1% | -28.0% |
| 10 | Aberdeen Group plc | 438,174 | $32.0M | 0.0% | 1.1% | +16.7% |
| 11 | Pictet Asset Management Holding SA | 385,375 | $28.2M | 0.0% | 1% | -0.4% |
| 12 | Assenagon Asset Management S.A. | 384,158 | $28.1M | 0.0% | 1% | -29.7% |
| 13 | VANGUARD PORTFOLIO MANAGEMENT LLC | 281,937 | $20.6M | 0.0% | 0.7% | +14.0% |
| 14 | NORTHERN TRUST CORP | 264,990 | $19.4M | 0.0% | 0.7% | +7.2% |
| 15 | Sixth Street Partners Management Company, L.P.NEW | 257,382 | $18.8M | 3.3% | 0.7% | new |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 257,382 | $18.8M | 0.0% | 0.7% | +2.5% |
| 17 | VANGUARD FIDUCIARY TRUST CO | 225,198 | $16.5M | 0.0% | 0.6% | +3.6% |
| 18 | CITADEL ADVISORS LLC | 209,308 | $15.3M | 0.0% | 0.5% | +113.7% |
| 19 | Bank of New York Mellon Corp | 204,727 | $15.0M | 0.0% | 0.5% | -0.1% |
| 20 | BNP PARIBAS FINANCIAL MARKETS | 184,695 | $13.5M | 0.0% | 0.5% | +44.6% |
| 21 | TWO SIGMA INVESTMENTS, LPNEW | 136,750 | $10.0M | 0.0% | 0.4% | new |
| 22 | BANK OF AMERICA CORP /DE/ | 135,111 | $9.9M | 0.0% | 0.4% | -19.0% |
| 23 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 114,109 | $8.3M | 0.0% | 0.3% | +2.9% |
| 24 | UBS Group AG | 110,971 | $8.1M | 0.0% | 0.3% | +12.5% |
| 25 | MILLENNIUM MANAGEMENT LLC | 106,248 | $7.8M | 0.0% | 0.3% | +27.6% |
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.