Disc Medicine, Inc. (IRON) Institutional Ownership

Ownership Summary

The institutional landscape for Disc Medicine, Inc. (NASDAQ:IRON) includes 167 filers as of the latest reporting cycle ending September 2025.

• These investors collectively held 98.4% of the company's total shares outstanding in September 2025, down from 99.6% in June 2025.
• The company experienced a -0.02% quarterly change in institutional shares held, alongside an increase of 26.52% in total owners annually.
• A review of institutional activity for Disc Medicine shows 77 of 167 filers increasing their positions, while 55 reduced their stake, and 35 remained unchanged.
• This class of investors decreased its holdings in Disc Medicine to 34.22Mn shares for the 13F-cycle ending September 2025, down by 5.93K shares quarter on quarter, and up 6.82Mn shares year over year.
• FMR LLC continues to be the largest institutional holder of Disc Medicine as of September 30, 2025, with a position of 4.94Mn shares, representing 14.20% of the company's outstanding stock.
• Among the most significant buyers of Disc Medicine during September 2025 were FMR LLC (1.69Mn), Vestal Point Capital, LP (360.00K), BALYASNY ASSET MANAGEMENT L.P. (322.68K), GOLDMAN SACHS GROUP INC (303.23K), First Light Asset Management, LLC (231.19K).
• Leading sellers of Disc Medicine stock in September 2025 included JANUS HENDERSON GROUP PLC (1.19Mn), Paradigm Biocapital Advisors LP (963.25K), Caption Management, LLC (418.70K), Logos Global Management LP (250.00K), Atlas Venture Life Science Advisors, LLC (241.84K).
• The top 10 institutional holders of Disc Medicine for the quarter ending September 2025 included FMR LLC (4.94Mn), Atlas Venture Life Science Advisors, LLC (2.14Mn), BlackRock, Inc. (2.02Mn), RA CAPITAL MANAGEMENT, L.P. (1.58Mn), VANGUARD GROUP INC (1.45Mn), Frazier Life Sciences Management, L.P. (1.44Mn), ORBIMED ADVISORS LLC (1.42Mn), WELLINGTON MANAGEMENT GROUP LLP (1.41Mn), PRICE T ROWE ASSOCIATES INC /MD/ (1.33Mn), STATE STREET CORP (1.05Mn).