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Disc Medicine IRON

US equityMarket cap rank #2644Biotechnology
$63.33 −$1.18 (-1.83%)
Pre-market · Oct 6, 4:10 am ET · After hours $63.33 0.00%
Open$65.13
Prev close$64.51
Day range$63.01 – $65.57
Volume456.3K
Market cap$2.43B
P/E (TTM)–
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership121.0%-0.43 pts vs. prior quarter
Institutions holding269-1 vs. prior quarter
Insider trades (recent)22 buys / 28 sellsNet selling
Short interest18.77% of floatDays to cover 13.6 · as of 15 Sep 2026
Short-sale volume share16.5%5-day average of daily volume

Short-sale volume as % of daily volume

10%14%17%20%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$3.25M (10 inflow days, 10 outflow days).

The five largest holders on file together own 37.8% of shares outstanding.

Largest holders

  • FMR12.75%
  • Access Industries, Inc.7.33%
  • BlackRock6.43%
  • RA Capital Management, L.P.6.38%
  • T. Rowe Price Group, Inc.4.88%
  • J.P. Morgan Asset Management, Inc.4.78%
  • Wellington Management Group4.54%
  • State Street Global Advisors4.29%

By investor type

  • Mutual Fund60.80%
  • VC/PE Fund30.09%
  • Hedge Fund24.96%
  • Private Company3.04%
  • Public Company1.40%
  • Individual/Insider0.57%
  • Government Pension Fund0.33%
  • Sovereign Wealth Fund0.28%

Reported short interest has risen from 16.66% to 18.77% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 7,207,702 18.8% 13.6
31 Aug 2026 7,365,002 19.2% 16.6
14 Aug 2026 7,342,568 19.1% 24.8
31 Jul 2026 7,394,606 19.3% 20.9
15 Jul 2026 7,290,442 19.1% 10.8
30 Jun 2026 6,363,314 16.7% 6.4

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