Disc Medicine, Inc. (IRON)
Nasdaq: IRON · Pharmaceutical Preparations · Watertown, MA · filing with the SEC since 2020
Who owns Disc Medicine, Inc.
As filed with the SECHolders of 5% or more
3
Fmr LLC holds 12.8% of COMMON STOCK, as its SCHEDULE 13G/A filed Aug 6, 2026 says.
Directors and officers
13
report now, of 41 people on the record since 2020. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Fmr LLC
SCHEDULE 13G/A · filed Aug 6, 2026 · COMMON STOCK · 14.1% in Nov 5, 2025
Ai Dmi LLC
SCHEDULE 13D/A · filed Oct 26, 2026 · Common Stock, par value $0.0001 per share · 8% in Oct 22, 2025
RA Capital Management, L.P.
SCHEDULE 13G · filed Jan 7, 2026 · Common Stock, $0.0001 par value per share
Orbimed Advisors LLC
SCHEDULE 13D/A · filed Mar 12, 2025 · Common Stock · reported falling below 5%
Wellington Management Group LLP
SCHEDULE 13G/A · filed Aug 12, 2025 · Common Stock · reported falling below 5%, from 6.8% in May 12, 2025
Paradigm BioCapital Advisors LP
SCHEDULE 13G/A · filed May 15, 2025 · Common Stock, $0.0001 par value per share · reported falling below 5%
Bain Capital Life Sciences Opportunities III, LP
SCHEDULE 13G/A · filed Feb 14, 2025 · Common Stock, $0.0001 par value per share · reported falling below 5%
Frazier Life Sciences Public Fund, L.P.
SCHEDULE 13G/A · filed Aug 14, 2025 · Common Stock, par value $0.0001 per share · reported falling below 5%
Atlas Venture Fund X, L.P.
SCHEDULE 13D/A · filed Dec 17, 2025 · Common Stock, $0.0001 par value per share · reported falling below 5%, from 3.1% in Aug 15, 2025
What IRON reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Gemini Merger
A company bought · acquisition · owns, named in the 10-K filed Feb 26, 2026
2 subsidiaries in 1 country, from the list filed with the 10-K filed Feb 26, 2026.
Insider tradesForm 4
97sales
0purchases
69sales on a scheduled plan
7people selling
$48.8Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 12, 2025 to Nov 12, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 12, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window7 of 61 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Bitterman Kevin | director | 47 | $26.7M | 24 | 0 | $0 |
| Quisel John D | Chief Executive Officer | 14 | $12.0M | 13 | 0 | $0 |
| Savage William Jacob | Chief Medical Officer | 9 | $3.6M | 8 | 0 | $0 |
| Yu Jonathan Yen-Wen | Chief Operating Officer | 9 | $3.0M | 8 | 0 | $0 |
| Khara Rahul | Chief Legal Officer | 11 | $1.9M | 10 | 0 | $0 |
| Franchi Jean M. | Chief Financial Officer | 6 | $1.2M | 6 | 0 | $0 |
| Stephenson Pamela | Chief Commercial Officer | 1 | $300,000 | 0 | 0 | $0 |