How many institutions held IRON - Disc Medicine, Inc. - Common Stock, par value $0.0001 per share in Q4 2025?

196 institutional investors reported IRON - Disc Medicine, Inc. - Common Stock, par value $0.0001 per share for Q4 2025. Use the holders table for investor-level position and value details.

Disc Medicine, Inc. - Common Stock, par value $0.0001 per share (IRON)

Q: What does CUSIP 254604101 represent in this 13F holders report?

CUSIP 254604101 is the security identifier for IRON - Disc Medicine, Inc. - Common Stock, par value $0.0001 per share used to aggregate holder disclosures.

CUSIP: 254604101

Q4 2025 13F Holders as of 31 Dec 2025

Security type / class: Equity / Common Stock, par value $0.0001 per share
Total 13F shares: 38,292,772
Total 13F value: $3,040,405,170
Share change: +3,887,626
Put/Call ratio: 321%
SEC-reported price per share: $79.41
Number of holders: 196
Value change: +$327,723,771
Number of buys: 120
Number of sells: 59
Shares outstanding: 44,597,121

Security key

254604101

Report period

Q4 2025

Institutions

196

Top holders

IRON full security history Ownership snapshot Full 13F holder table Newer quarter: Q3 2026 Disc Medicine, Inc. SEC filings Disc Medicine, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 254604101

Newer quarter: Q3 2026

Recent filing periods:

Q3 2026

Ownership snapshot

Top reported holders of IRON - Disc Medicine, Inc. - Common Stock, par value $0.0001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

RA CAPITAL MANAGEMENT, L.P.

Disclosed value leader

Braden M. Leonard

Comparable rows

7/15

Latest evidence

30 Dec 2025

13D/G 13F 3/4/5 Lead comparable stake: 5.9% 8 rows are not safely comparable across share classes. 13D/G row: RA CAPITAL MANAGEMENT, L.P. Showing 1-6 of 15 holder rows.

Quick read

RA CAPITAL MANAGEMENT, L.P. leads the comparable SEC ownership view at 5.9%.

7 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens RA CAPITAL MANAGEMENT, L.P.'s linked filing trail.

Comparable ownership Top 5

RA CAPITAL MANAGEMENT, L.P. 5.9%

ORBIMED ADVISORS LLC 4.5%

WELLINGTON MANAGEMENT GROUP LLP 4.1%

Paradigm Biocapital Advisors LP 3.5%

Bain Capital Life Sciences Opport... 3.3%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
RA CAPITAL MANAGEMENT, L.P.	13D/G 13F Company 13D/G 13F	5.9% Reported 13D/G · 30 Dec 2025	$177,001,530 2,228,924 shares	$0	30 Dec 2025
ORBIMED ADVISORS LLC	13F 13D/G 3/4/5 Company · Director 13F 13D/G 3/4/5	4.5% Reported 13D/G · 10 Mar 2025	$93,504,522 1,415,020 shares	—	30 Sep 2025
WELLINGTON MANAGEMENT GROUP LLP	13F 13D/G Company 13F 13D/G	4.1% Reported 13D/G · 30 Jun 2025	$93,177,887 1,410,077 shares	—	30 Sep 2025
Paradigm Biocapital Advisors LP	13D/G 13F Company 13D/G 13F	3.5% Reported 13D/G · 31 Mar 2025	$57,097,283 1,210,971 shares	$0	31 Mar 2025
Bain Capital Life Sciences Opportunities III, LP	13D/G 13D/G	3.3% Reported 13D/G · 31 Dec 2024	$46,372,025 983,500 shares	$0	31 Dec 2024
Frazier Life Sciences Public Fund, L.P.	13D/G 13D/G	3% Reported 13D/G · 30 Jun 2025	$57,339,676 1,026,489 shares	$0	30 Jun 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q4 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

196

38,292,772

Rows available

196

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q4 2025 vs Q3 2025 Across Filers

Q3 2025 holders

164

Q4 2025 holders

196

Holder diff

Investor	Q3 2025 Shares	Q4 2025 Shares	Share Diff	Share Chg %	Q3 2025 value	Q4 2025 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend