IRON · Disc Medicine, Inc.
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, 2026Top Holder
11.3%
−1.9 pts
Top 5
31.4%
−1.1 pts
Top 10
49.5%
+0.1 pts
HHI
366
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 |
|---|---|---|---|
| Mid Vestal Point Capital, LP | +850,000 | 1,550,000 | |
| Mega JPMORGAN CHASE & CO | +504,315 | 1,875,795 | |
| Mid Opaleye Management Inc. | +434,000 | 855,000 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | +326,049 | 1,875,399 | |
| Mid Logos Global Management LP | +315,000 | 875,000 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mid ORBIMED ADVISORS LLC | −710,015 | 357,535 | |
| Mega FMR LLC | −692,421 | 4,894,473 | |
| Mega GOLDMAN SACHS GROUP INC | −542,459 | 97,383 | |
| Mega JENNISON ASSOCIATES LLC | −170,862 | 439,520 | |
| Large Assenagon Asset Management S.A. | −162,089 | 384,158 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega TWO SIGMA INVESTMENTS, LP | 136,750 | $10,001,895 | |
| Large Trexquant Investment LP | 107,699 | $7,877,104 | |
| Large HRT FINANCIAL LP | 90,822 | $6,642,721 | |
| Large PEAK6 LLC | 60,000 | $4,388,400 | |
| Large ExodusPoint Capital Management, LP | 51,623 | $3,775,706 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mid Integral Health Asset Management, LLC | 170,000 | $10,869,800 | |
| Large Freestone Grove Partners LP | 68,687 | $4,391,846 | |
| Mid Nantahala Capital Management, LLC | 66,653 | $4,261,792 | |
| Small Sio Capital Management, LLC | 65,203 | $4,169,079 | |
| Large RENAISSANCE TECHNOLOGIES LLC | 31,820 | $2,034,570 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega FMR LLC | $357,981,753 | 11.33% | 4,894,473 | Shares | 2026-08-13 | |
| Mega BlackRock, Inc. | $180,502,128 | 5.71% | 2,467,899 | Shares | 2026-08-07 | |
| Large RA CAPITAL MANAGEMENT, L.P. | $179,209,163 | 5.67% | 2,450,221 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO | $137,195,645 | 4.34% | 1,875,795 | Shares | 2026-08-12 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $137,166,682 | 4.34% | 1,875,399 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP | $127,362,408 | 4.03% | 1,741,351 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP | $120,595,865 | 3.82% | 1,648,836 | Shares | 2026-08-07 | |
| Mid Vestal Point Capital, LP | $113,367,000 | 3.59% | 1,550,000 | Shares | 2026-08-14 | |
| Small Atlas Venture Life Science Advisors, LLC | $110,724,817 | 3.51% | 1,513,875 | Shares | 2026-08-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $100,130,634 | 3.17% | 1,369,027 | Shares | 2026-08-13 | |
| Mid Frazier Life Sciences Management, L.P. | $99,093,875 | 3.14% | 1,354,852 | Shares | 2026-08-14 | |
| Mid TCG Crossover Management, LLC | $98,143,786 | 3.11% | 1,341,862 | Shares | 2026-08-14 | |
| Mid BVF INC/IL | $84,375,181 | 2.67% | 1,153,612 | Shares | 2026-08-14 | |
| Large Woodline Partners LP | $70,088,672 | 2.22% | 958,281 | Shares | 2026-08-14 | |
| Mid Siren, L.L.C. | $64,977,649 | 2.06% | 888,401 | Shares | 2026-08-13 | |
| Mid Logos Global Management LP | $63,997,500 | 2.03% | 875,000 | Shares | 2026-08-14 | |
| Mid Opaleye Management Inc. | $62,534,700 | 1.98% | 855,000 | Shares | 2026-08-14 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $57,760,413 | 1.83% | 789,724 | Shares | 2026-08-12 | |
| Mid DEERFIELD MANAGEMENT COMPANY, L.P. | $48,052,980 | 1.52% | 657,000 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP | $41,617,974 | 1.32% | 569,018 | Shares | 2026-08-11 | |
| Mid Bellevue Group AG | $40,958,400 | 1.30% | 560,000 | Shares | 2026-08-14 | |
| Small Saturn V Capital Management LP | $38,378,752 | 1.21% | 524,730 | Shares | 2026-08-14 | |
| Mid ARMISTICE CAPITAL, LLC | $33,644,400 | 1.07% | 460,000 | Shares | 2026-08-14 | |
| Mega JENNISON ASSOCIATES LLC | $32,146,492 | 1.02% | 439,520 | Shares | 2026-08-03 | |
| Large Aberdeen Group plc | $32,048,046 | 1.01% | 438,174 | Shares | 2026-07-31 | |
| Small Palo Alto Investors LP | $30,473,488 | 0.96% | 416,646 | Shares | 2026-08-19 | |
| Mid EVENTIDE ASSET MANAGEMENT, LLC | $28,937,914 | 0.92% | 395,651 | Shares | 2026-08-14 | |
| Mega Pictet Asset Management Holding SA | $28,186,327 | 0.89% | 385,375 | Shares | 2026-07-30 | |
| Large Assenagon Asset Management S.A. | $28,097,316 | 0.89% | 384,158 | Shares | 2026-08-21 | |
| Large LOOMIS SAYLES & CO L P | $27,929,532 | 0.88% | 381,864 | Shares | 2026-08-14 | |
| Small Foresite Capital Management V, LLC | $27,359,406 | 0.87% | 374,069 | Shares | 2026-08-14 | |
| Mid ORBIMED ADVISORS LLC | $26,150,109 | 0.83% | 357,535 | Shares | 2026-08-14 | |
| Large BAKER BROS. ADVISORS LP | $25,573,912 | 0.81% | 349,657 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | $20,620,872 | 0.65% | 281,937 | Shares | 2026-08-13 | |
| Mid Octagon Capital Advisors LP | $19,747,800 | 0.63% | 270,000 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $19,381,367 | 0.61% | 264,990 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $18,824,919 | 0.60% | 257,382 | Shares | 2026-08-14 | |
| Small Checkpoint Capital L.P. | $17,562,742 | 0.56% | 240,125 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $16,470,981 | 0.52% | 225,198 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC | $15,308,786 | 0.48% | 209,308 | Shares | 2026-08-14 | |
| Mega Bank of New York Mellon Corp Bank | $14,973,727 | 0.47% | 204,727 | Shares | 2026-08-06 | |
| Mega BNP PARIBAS ARBITRAGE, SA | $13,508,592 | 0.43% | 184,695 | Shares | 2026-08-13 | |
| Small Catalio Capital Management, LP | $11,657,345 | 0.37% | 159,384 | Shares | 2026-08-14 | |
| Large Caption Management, LLC | $10,971,000 | 0.35% | 150,000 | Call | 2026-08-14 | |
| Mid Sofinnova Investments, Inc. | $10,695,920 | 0.34% | 146,239 | Shares | 2026-08-14 | |
| Mid Bain Capital Life Sciences Investors, LLC | $10,329,854 | 0.33% | 141,234 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP | $10,001,895 | 0.32% | 136,750 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $9,882,017 | 0.31% | 135,111 | Shares | 2026-08-14 | |
| Large Alyeska Investment Group, L.P. | $9,142,500 | 0.29% | 125,000 | Shares | 2026-08-14 | |
| Large Ensign Peak Advisors, Inc | $8,931,198 | 0.28% | 122,111 | Shares | 2026-08-14 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $8,345,930 | 0.26% | 114,109 | Shares | 2026-08-13 | |
| Mega UBS Group AG | $8,116,418 | 0.26% | 110,971 | Shares | 2026-08-13 | |
| Large Trexquant Investment LP | $7,877,104 | 0.25% | 107,699 | Shares | 2026-08-14 | |
| Mid KENNEDY CAPITAL MANAGEMENT LLC | $7,809,084 | 0.25% | 106,769 | Shares | 2026-08-14 | |
| Mega MILLENNIUM MANAGEMENT LLC | $7,770,978 | 0.25% | 106,248 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC | $7,122,592 | 0.23% | 97,383 | Shares | 2026-08-14 | |
| Mega MORGAN STANLEY | $6,699,255 | 0.21% | 91,595 | Shares | 2026-08-13 | |
| Large HRT FINANCIAL LP | $6,642,721 | 0.21% | 90,822 | Shares | 2026-08-14 | |
| Small SILVERARC CAPITAL MANAGEMENT, LLC | $6,055,992 | 0.19% | 82,800 | Shares | 2026-08-13 | |
| Mega RAYMOND JAMES FINANCIAL INC | $5,703,455 | 0.18% | 77,980 | Shares | 2026-08-14 | |
| Large Squarepoint Ops LLC | $5,549,278 | 0.18% | 75,872 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $5,383,104 | 0.17% | 73,600 | Call | 2026-08-14 | |
| Large DNB Asset Management AS | $5,348,508 | 0.17% | 73,127 | Shares | 2026-08-11 | |
| Mid iA Global Asset Management Inc. | $4,828,922 | 0.15% | 66,023 | Shares | 2026-07-29 | |
| Mid Casdin Capital, LLC | $4,754,100 | 0.15% | 65,000 | Shares | 2026-08-14 | |
| Small SPHERA FUNDS MANAGEMENT LTD. | $4,647,169 | 0.15% | 63,538 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $4,414,510 | 0.14% | 60,357 | Shares | 2026-08-11 | |
| Large PEAK6 LLC | $4,388,400 | 0.14% | 60,000 | Call | 2026-08-13 | |
| Small KVP Capital Advisors, LP | $4,260,405 | 0.13% | 58,250 | Shares | 2026-08-13 | |
| Mid MOORE CAPITAL MANAGEMENT, LP | $4,227,199 | 0.13% | 57,796 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $4,147,769 | 0.13% | 56,710 | Shares | 2026-08-14 | |
| Small NEXTBio Capital Management LP | $3,851,186 | 0.12% | 52,655 | Shares | 2026-08-14 | |
| Mid ALGERT GLOBAL LLC | $3,792,309 | 0.12% | 51,850 | Shares | 2026-08-13 | |
| Large ExodusPoint Capital Management, LP | $3,775,706 | 0.12% | 51,623 | Shares | 2026-08-14 | |
| Mid Burkehill Global Management, LP | $3,657,000 | 0.12% | 50,000 | Shares | 2026-08-14 | |
| Mega SCHRODER INVESTMENT MANAGEMENT GROUP | $3,656,999 | 0.12% | 50,000 | Shares | 2026-08-13 | |
| Mid Brevan Howard Capital Management LP | $3,656,707 | 0.12% | 49,996 | Shares | 2026-08-14 | |
| Mega Swiss National Bank Bank | $3,642,372 | 0.12% | 49,800 | Shares | 2026-08-11 | |
| Mega AMERIPRISE FINANCIAL INC | $3,355,224 | 0.11% | 45,874 | Shares | 2026-08-14 | |
| Small Atle Fund Management AB | $3,194,901 | 0.10% | 43,682 | Shares | 2026-07-24 | |
| Large Quadrature Capital Ltd | $3,102,525 | 0.10% | 42,419 | Shares | 2026-08-07 | |
| Mega Invesco Ltd. | $3,076,047 | 0.10% | 42,057 | Shares | 2026-08-14 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension | $2,878,790 | 0.09% | 39,360 | Shares | 2026-08-24 | |
| Large ALPS ADVISORS INC | $2,820,644 | 0.09% | 38,565 | Shares | 2026-07-29 | |
| Mega CITIGROUP INC | $2,802,504 | 0.09% | 38,317 | Shares | 2026-08-03 | |
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $2,798,481 | 0.09% | 38,262 | Shares | 2026-08-13 | |
| Large Universal- Beteiligungs- und Servicegesellschaft mbH | $2,679,410 | 0.08% | 36,634 | Shares | 2026-08-06 | |
| Mega RHUMBLINE ADVISERS | $2,621,630 | 0.08% | 35,844 | Shares | 2026-08-12 | |
| Large LAZARD ASSET MANAGEMENT LLC | $2,562,386 | 0.08% | 35,034 | Shares | 2026-08-14 | |
| Mid SEVEN GRAND MANAGERS, LLC | $2,559,900 | 0.08% | 35,000 | Shares | 2026-08-14 | |
| Mega ALLIANCEBERNSTEIN L.P. | $2,535,763 | 0.08% | 34,670 | Shares | 2026-08-14 | |
| Large MARSHALL WACE, LLP | $2,515,577 | 0.08% | 34,394 | Shares | 2026-08-13 | |
| Mid Jump Financial, LLC | $2,380,633 | 0.08% | 32,549 | Shares | 2026-08-13 | |
| Mega BANK OF MONTREAL /CAN/ Bank | $2,363,007 | 0.07% | 32,308 | Shares | 2026-08-12 | |
| Mega DEUTSCHE BANK AG\ Bank | $2,241,228 | 0.07% | 30,643 | Shares | 2026-08-07 | |
| Small Squadron Capital Management LLC | $2,194,200 | 0.07% | 30,000 | Call | 2026-08-14 | |
| Large RTW INVESTMENTS, LP | $2,194,200 | 0.07% | 30,000 | Shares | 2026-08-14 | |
| Mega VICTORY CAPITAL MANAGEMENT INC | $2,129,617 | 0.07% | 29,117 | Shares | 2026-08-07 | |
| Mega WELLS FARGO & COMPANY/MN | $2,115,499 | 0.07% | 28,924 | Shares | 2026-08-14 | |
| Large TUDOR INVESTMENT CORP ET AL | $2,096,411 | 0.07% | 28,663 | Shares | 2026-08-14 |
Key facts
CIK
1816736
CUSIP
254604101
13F (30d)
200 filings
197 filers
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