Disc MedicineIRON
13F holders, Q1 2026 (March 31)203holders +6
39new positions
37sold out
5famous investors
$63.75avg. 13F price*
At the end of Q1 2026, 203 institutions reported holding Disc Medicine Inc. (IRON) in their 13F filings, up 6 from Q4 2025. 39 opened new positions and 37 sold out. The largest holders were FMR LLC ($357.2M), Ra Capital Management, L.P. ($156.7M) and BlackRock, Inc. ($145.4M). 5 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Disc Medicine Inc.
- CUSIP
- 254604101
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 39 | $195.7M |
| Exits | 37 | $179.7M |
All 13F filers, Q4 2025 → Q1 2026: 7,194,107 shares bought and 3,707,111 shares sold, net +3,486,996 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 203 holders
| FMR LLC | 0.02% | Add +2.5% | 5,586,894 | $357.2M |
| Ra Capital Management, L.P. | 1.66% | Add +24.0% | 2,450,221 | $156.7M |
| BlackRock, Inc. | 0.00% | Reduce -0.1% | 2,273,831 | $145.4M |
| Wellington Management Group LLP | 0.02% | Add +14.3% | 1,735,376 | $111.0M |
| State Street Corp. | 0.00% | Add +43.0% | 1,698,244 | $108.6M |
| T. Rowe Price Associates Inc. | 0.01% | Reduce -8.8% | 1,549,350 | $99.1M |
| Atlas Venture Life Science Advisors, LLC | 12.25% | No change | 1,513,875 | $96.8M |
| Vanguard Capital Management LLC | 0.00% | — | 1,375,430 | $87.9M |
| Frazier Life Sciences Management, L.P. | 2.23% | Add +7.5% | 1,354,852 | $86.6M |
| TCG Crossover Management, LLC | 2.45% | New | 1,341,862 | $85.8M |
| JPMorgan Chase & Co. | 0.01% | Reduce -13.3% | 1,371,480 | $83.4M |
| BVF Inc. | 2.59% | Add +95.7% | 1,272,312 | $81.4M |
| Orbimed Advisors LLC | 1.54% | No change | 1,067,550 | $68.3M |
| Siren, L.L.C. | 1.75% | No change | 988,401 | $63.2M |
| Woodline Partners LP | 0.23% | Add +0.1% | 958,281 | $61.3M |
| Geode Capital Management, LLC | 0.00% | Add +8.7% | 744,222 | $47.6M |
| Vestal Point Capital, LP | 1.25% | Reduce -4.8% | 700,000 | $44.8M |
| Deerfield Management Company, L.P. | 0.59% | Add +28.5% | 657,000 | $42.0M |
| Goldman Sachs Group Inc. | 0.01% | Reduce -15.2% | 639,842 | $40.9M |
| Jennison Associates LLC | 0.03% | Add +14.7% | 610,382 | $39.0M |
| Logos Global Management LP | 1.84% | Add +9.8% | 560,000 | $35.8M |
| Assenagon Asset Management S.A. | 0.06% | Add +52.6% | 546,247 | $34.9M |
| Armistice Capital, LLC | 1.13% | Add +7.3% | 536,000 | $34.3M |
| Bellevue Group AG | 0.70% | New | 459,314 | $29.4M |
| Saturn V Capital Management LP | 5.21% | Add +50.8% | 449,926 | $28.8M |
| Opaleye Management Inc. | 3.55% | Add +110.5% | 421,000 | $26.9M |
| Palo Alto Investors LP | 3.93% | Add +26.5% | 401,719 | $25.7M |
| Eventide Asset Management, LLC | 0.42% | Add +0.1% | 395,572 | $25.3M |
| Dimensional Fund Advisors LP | 0.01% | Add +76.4% | 394,447 | $25.2M |
| Pictet Asset Management Holding SA | 0.03% | Reduce -1.9% | 387,005 | $24.7M |
| Aberdeen Group plc | 0.04% | Add +60.3% | 375,614 | $24.0M |
| Foresite Capital Management V, LLC | 8.83% | Add +25.1% | 374,069 | $23.9M |
| Baker Bros. Advisors LP | 0.13% | Add +3.7% | 349,657 | $22.4M |
| Loomis Sayles & Co. L P | 0.03% | Add +12.3% | 317,222 | $20.3M |
| Checkpoint Capital L.P. | 6.58% | Reduce -36.7% | 286,661 | $18.3M |
| Octagon Capital Advisors LP | 1.91% | New | 270,000 | $17.3M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +1.7% | 251,195 | $16.1M |
| Vanguard Portfolio Management LLC | 0.00% | — | 247,338 | $15.8M |
| Northern Trust Corp. | 0.00% | Add +8.4% | 247,195 | $15.8M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 217,436 | $13.9M |
| Bank of New York Mellon Corp | 0.00% | Add +202.7% | 204,968 | $13.1M |
| Silverarc Capital Management, LLC | 1.48% | New | 196,028 | $12.5M |
| Ensign Peak Advisors, Inc | 0.02% | Add +8.2% | 191,487 | $12.2M |
| Integral Health Asset Management, LLC | 0.58% | New | 170,000 | $10.9M |
| Bank of America Corp. | 0.00% | Add +22.6% | 166,775 | $10.7M |
| Bain Capital Life Sciences Investors, LLC | 0.82% | New | 141,234 | $9.0M |
| BNP Paribas Financial Markets | 0.01% | Add +4.6% | 127,737 | $8.2M |
| Alyeska Investment Group, L.P. | 0.02% | Add +150.0% | 125,000 | $8.0M |
| Catalio Capital Management, LP | 1.64% | Add +11.4% | 122,978 | $7.9M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -3.0% | 110,890 | $7.1M |
| Kennedy Capital Management LLC | 0.15% | Add +1061.4% | 108,286 | $6.9M |
| UBS Group AG | 0.00% | Reduce -15.1% | 98,621 | $6.3M |
| Citadel Advisors | 0.00% | Reduce -2.5% | 97,930 | $6.3M |
| DNB Asset Management AS | 0.02% | Add +14.8% | 96,755 | $6.2M |
| Morgan Stanley | 0.00% | Add +26.0% | 94,264 | $6.0M |
| Millennium Management | 0.00% | Reduce -54.9% | 83,259 | $5.3M |
| Jump Financial, LLC | 0.09% | New | 81,829 | $5.2M |
| Sofinnova Investments, Inc. | 0.25% | Reduce -29.4% | 78,320 | $5.0M |
| Freestone Grove Partners LP | 0.03% | New | 68,687 | $4.4M |
| iA Global Asset Management Inc. | 0.06% | Reduce -0.3% | 66,243 | $4.2M |
| Sio Capital Management, LLC | 0.60% | Add +13.2% | 65,203 | $4.2M |
| Casdin Capital, LLC | 0.31% | New | 65,000 | $4.2M |
| KVP Capital Advisors, LP | 2.78% | No change | 58,250 | $3.7M |
| Moore Capital Management, LP | 0.15% | New | 57,796 | $3.7M |
| Rafferty Asset Management, LLC | 0.01% | Add +49.3% | 53,869 | $3.4M |
| Sphera Funds Management LTD. | 0.59% | New | 53,538 | $3.4M |
| NEXTBio Capital Management LP | 1.56% | Add +23.1% | 52,655 | $3.4M |
| Nuveen, LLC | 0.00% | Add +6.0% | 51,380 | $3.3M |
| Burkehill Global Management, LP | 0.17% | No change | 50,000 | $3.2M |
| Atle Fund Management AB | 1.03% | Add +123.6% | 107,255 | $3.2M |
| Schroder Investment Management Group | 0.00% | Add +1.7% | 50,959 | $3.1M |
| Swiss National Bank | 0.00% | No change | 48,000 | $3.1M |
| Ameriprise Financial Inc. | 0.00% | Reduce -44.8% | 45,837 | $2.9M |
| Raymond James Financial Inc. | 0.00% | Reduce -44.3% | 44,700 | $2.7M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.00% | Reduce -0.7% | 39,910 | $2.6M |
| Lazard Asset Management LLC | 0.00% | Reduce -32.1% | 39,400 | $2.5M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Add +39.2% | 38,006 | $2.4M |
| Seven Grand Managers, LLC | 0.15% | No change | 35,000 | $2.2M |
| XTX Topco Ltd | 0.04% | Add +49.0% | 34,418 | $2.2M |
| California State Teachers Retirement System | 0.00% | Add +47.8% | 34,382 | $2.2M |
| Barclays PLC | 0.00% | Reduce -66.6% | 33,267 | $2.1M |
| Rhumbline Advisers | 0.00% | Add +10.8% | 33,058 | $2.1M |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -38.1% | 32,493 | $2.1M |
| Brevan Howard Capital Management LP | 0.02% | Reduce -34.8% | 32,406 | $2.0M |
| Renaissance Technologies | 0.00% | Reduce -49.4% | 31,820 | $2.0M |
| Squarepoint Ops LLC | 0.00% | Add +101.3% | 31,709 | $2.0M |
| Alps Advisors Inc. | 0.01% | Add +0.2% | 31,058 | $2.0M |
| Tudor Investment Corporation | 0.01% | Reduce -53.1% | 31,002 | $2.0M |
| Invesco Ltd. | 0.00% | Reduce -49.8% | 30,638 | $2.0M |
| Alliancebernstein L.P. | 0.00% | No change | 24,540 | $1.9M |
| TD Asset Management Inc | 0.00% | Reduce -56.2% | 30,476 | $1.9M |
| RTW Investments, LP | 0.02% | No change | 30,000 | $1.9M |
| Victory Capital Management Inc. | 0.00% | Reduce -61.7% | 29,218 | $1.9M |
| Bank of Montreal | 0.00% | Add +15.9% | 28,773 | $1.8M |
| Nantahala Capital Management, LLC | 0.10% | Reduce -80.7% | 25,653 | $1.6M |
| PNC Financial Services Group, Inc. | 0.00% | Add +0.4% | 25,292 | $1.6M |
| Deutsche Bank AG | 0.00% | Add +18.9% | 24,401 | $1.6M |
| Profund Advisors LLC | 0.06% | Add +77.9% | 23,972 | $1.5M |
| Algert Global LLC | 0.02% | New | 22,680 | $1.5M |
| Boothbay Fund Management, LLC | 0.03% | New | 21,378 | $1.4M |
"% of holder's portfolio" is IRON's weight in each manager's 13F, not the share of Disc Medicine Inc. the manager owns.