Disc Medicine (IRON)
Develops heme and iron-homeostasis therapies for serious blood disorders.
$65.42
vs last close−3.06 (−4.47%)
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13F · 13D/G · Form 4
| Institutions | ≈ 111.67% | 42.87M shares | |
|---|---|---|---|
| 233 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail | |||
| Insiders | 3.22% | 1.24M shares | |
| 7 holders · as of Sep 16, 2026 | |||
| Strategic holders | 7.33% | 2.81M shares | |
| 1 holder · as of Oct 24, 2025 | |||
| Adds to | 122.22% | ||
38.39M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
These groups come from separate filings that can overlap, so they add to 122.22%; nothing is left for Other.
13F, as of Jun 30, 2026
233 holders · 42.87M shares · 44 new positions · 120 increased · 65 reduced · 24 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| FMR LLC | 4.89M | 12.75% | −692.4K | Aug 13, 2026 |
| BlackRock, Inc. | 2.47M | 6.43% | +194.1K | Aug 7, 2026 |
| Ra Capital Management, L.P. | 2.45M | 6.38% | 0 | Aug 14, 2026 |
| JPMorgan Chase & Co | 1.88M | 4.89% | +504.3K | Aug 12, 2026 |
| Price T Rowe Associates Inc /MD/ | 1.88M | 4.88% | +326.0K | Aug 14, 2026 |
| Wellington Management Group LLP | 1.74M | 4.54% | +6.0K | Aug 14, 2026 |
| State Street Corp | 1.65M | 4.29% | −49.4K | Aug 7, 2026 |
| Vestal Point Capital, LP | 1.55M | 4.04% | +850.0K | Aug 14, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| FMR LLC | 14.10% | 4.91M | 13G | Nov 5, 2025 |
| Access Industries Management, LLCincl. Len Blavatnik, Access Industries Holdings LLC +1 more | 8.00% | 3.02M | 13D | Oct 22, 2025 |
| BlackRock, Inc. | 6.20% | 1.85M | Nov 8, 2024 | |
| Wellington Group Holdings LLPincl. Wellington Management Company LLP, Wellington Management Group LLP +1 more | 6.19% | 1.84M | 13G | Nov 8, 2024 |
| RA Capital Management, L.P. | 5.90% | 2.23M | 13G | Jan 7, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Sep 11, 2026 | Kevin Bittermandirector | Sale | 27,136 | $70.11 | 0 |
| Sep 4, 2026 | Kevin Bittermandirector | Sale · 3 lots | 1,689 | $79.96 | 13,427 |
| Sep 3, 2026 | Kevin Bittermandirector | Sale · 3 lots | 5,203 | $79.98 | 13,445 |
| Sep 2, 2026 | Kevin Bittermandirector | Sale · 6 lots | 49,164 | $80.17 | 13,499 |
| Sep 1, 2026 | Kevin Bittermandirector | Sale · 3 lots | 129 | $79.95 | 14,012 |
| Aug 25, 2026 | Jonathan Yen-Wen Yuofficer: Chief Operating Officer | Sale | 8,796 | $83.12 | 54,324 |
| Aug 24, 2026 | Jonathan Yen-Wen Yuofficer: Chief Operating Officer | Sale | 300 | $82.53 | 54,324 |
| Aug 17, 2026 | John D. Quiseldirector, officer: Chief Executive Officer | Sale · 3 lots | 33,000 | $79.15 | 226,064 |
| Aug 12, 2026 | Jonathan Yen-Wen Yuofficer: Chief Operating Officer | Sale | 804 | $82.64 | 54,324 |
| Aug 6, 2026 | Rahul Kharaofficer: Chief Legal Officer | Sale | 5,000 | $80.00 | 52,324 |
House and Senate disclosures
Not reported.