How many institutions held IRON - Disc Medicine, Inc. - Common Stock, par value $0.0001 per share in Q1 2024?

125 institutional investors reported IRON - Disc Medicine, Inc. - Common Stock, par value $0.0001 per share for Q1 2024. 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

Q1 2024 13F Holders as of 31 Mar 2024

Security type / class: Equity / Common Stock, par value $0.0001 per share
Total 13F shares: 22,155,328
Total 13F value: $1,379,374,874
Share change: +1,962,129
Put/Call ratio: 397%
SEC-reported price per share: $62.26
Number of holders: 125
Value change: +$124,372,681
Number of buys: 84
Number of sells: 40
Shares outstanding: 44,597,121

Security key

254604101

Report period

Q1 2024

Institutions

125

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

Braden M. Leonard

Disclosed value leader

Braden M. Leonard

Comparable rows

0/15

Latest evidence

23 Jan 2024

3/4/5 13F Highest disclosed value: $354,993,375 15 rows are not safely comparable across share classes. Showing 1-6 of 15 holder rows.

Quick read

Braden M. Leonard has the largest disclosed position value at $354.99M.

0 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 Braden M. Leonard's linked filing trail.

Disclosed position value Top 5

Braden M. Leonard $354.99M

Atlas Venture Fund X, L.P. $108.27M

Novo Holdings A/S $73.79M

James B. Tananbaum $27.84M

Atlas Venture Opportunity Fund II... $14.77M

Value bars compare disclosed positions; verify each figure against the linked filing evidence.

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

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Braden M. Leonard	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$354,993,375 5,247,500 shares	—	26 Oct 2022
Atlas Venture Fund X, L.P.	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$108,274,637 1,600,512 shares	—	23 Jan 2024
Novo Holdings A/S	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$73,790,726 1,090,772 shares	—	28 Jun 2023
James B. Tananbaum	3/4/5 Director, 10%+ Owner 3/4/5	— mixed-class rows	$27,837,975 428,745 shares mixed-class rows	—	04 Oct 2021
Atlas Venture Opportunity Fund II, L.P.	3/4/5 10%+ Owner 3/4/5	— denominator unverified	$14,769,754 218,326 shares	—	29 Dec 2022
Carl L. Gordon	3/4/5 Director, 10%+ Owner 3/4/5	— denominator unverified	— 17,245 shares	—	04 Oct 2021

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 Q1 2024

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

Institutions

125

22,155,328

Rows available

125

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 Q1 2024 vs Q1 2024 Across Filers

Q1 2024 holders

125

Q1 2024 holders

125

Holder diff

Investor	Q1 2024 Shares	Q1 2024 Shares	Share Diff	Share Chg %	Q1 2024 value	Q1 2024 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend