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Companies / Health Care / Disc Medicine, Inc.
IRON

Disc Medicine, Inc.

Health CarePharmaceutical Preparations
Ticker IRONWATERTOWN, MAFiscal year ends DecemberBook value per share $15.62Diluted shares 38.7M

Disc Medicine, Inc. (Nasdaq: IRON) is a clinical-stage biopharmaceutical company developing treatments for serious hematologic diseases, with product candidates targeting pathways involved in red blood cell formation and function, particularly heme biosynthesis and iron homeostasis. Its pipeline includes bitopertin… From the company’s description.

In fiscal 2025, Disc Medicine, Inc. reported a net loss of $212.18M. Operations used $180.39M in cash.

Fiscal year 2025 · ends 12-31Changes are against fiscal 2024The amber dot is the latest twelve months, to 2026-09-30
Sales & profitability
—
0.00%FY2025
$-212.18MFY2025
−94.0% year over year
Last 12 mo $-243.10M
-28.68%FY2025
−4 percentage points
Last 12 mo -40.23%
Cash & financing
$-180.39MFY2025
−92.1% year over year
Last 12 mo $-189.94M
$-181.33MFY2025
−92.0% year over year
Last 12 mo $-189.96M
0.04FY2025
Was 0.06× a year earlier
Last 12 mo 0.10
35.3MFY2025
+27.9% year over year
Last 12 mo 38.7M

Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.

What Disc Medicine, Inc. does

In the company’s own words

Disc Medicine, Inc. (Nasdaq: IRON) is a clinical-stage biopharmaceutical company developing treatments for serious hematologic diseases, with product candidates targeting pathways involved in red blood cell formation and function, particularly heme biosynthesis and iron homeostasis. Its pipeline includes bitopertin for erythropoietic porphyrias, including EPP and XLP; DISC-0974 for anemia associated with myelofibrosis and inflammatory bowel disease; DISC-3405 for polycythemia vera, sickle cell disease and other blood disorders; and preclinical DISC-0998 for anemia associated with inflammatory diseases. The company’s development programs are organized around heme biosynthesis modulation and iron homeostasis, with candidates designed to reduce toxic heme-pathway metabolites, increase iron availability to address anemia, or restrict iron to reduce excessive red blood cell production. Disc was founded in 2017 and has built its portfolio through internal research and licensing agreements, including rights to bitopertin from Roche. Its website is https://www.discmedicine.com.

Company details
Sector
Health Care
Industry (SIC)
Pharmaceutical Preparations
Headquarters
WATERTOWN, MA
Fiscal year end
December
CIK
1816736
SIC
2834

Financial performance, year by year

Fiscal 2021–2025 · USD
$-262.73M$-203.85M$-144.96M$-86.08M$-27.20M20212022202320242025Last 12 moLast 12 months

The full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.

Ownership

Who owns Disc Medicine, Inc. — and what changed

Funds as of 2026Q2 · superinvestors as of 2026-06-30

219
funds hold it
0 of 35
superinvestors hold it
$1.08B
held by funds, at market
33.4%
of shares held by funds

Largest fund holders · Disc Medicine, Inc.’s weight in each

Strategic Advisers Fidelity U.S. Total Stock Fund
FCTDX · Fidelity Rutland Square Trust II
—of fund net assets
VANGUARD TOTAL STOCK MARKET INDEX FUND
VTI · VANGUARD INDEX FUNDS
0.00%of fund net assets
0.65%of fund net assets
iShares Russell 2000 ETF
IWM · iShares Trust
0.07%of fund net assets
JPMorgan Mid Cap Growth Fund
HLGEX · JPMorgan Trust II
0.36%of fund net assets

Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.

Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.

Could not be determined for this company: bond issues.

Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.

Connected research

Put this business in context.

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