How many institutions held IRON - Disc Medicine, Inc. - Common Stock, $0.0001 par value per share in Q3 2023?

90 institutional investors reported IRON - Disc Medicine, Inc. - Common Stock, $0.0001 par value per share for Q3 2023. Use the holders table for investor-level position and value details.

Disc Medicine, Inc. - Common Stock, $0.0001 par value 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, $0.0001 par value per share used to aggregate holder disclosures.

CUSIP: 254604101

Q3 2023 13F Holders as of 30 Sep 2023

Security type / class: Equity / Common Stock, $0.0001 par value per share
Total 13F shares: 19,879,838
Total 13F value: $933,957,855
Share change: +861,706
Put/Call ratio: 114%
SEC-reported price per share: $46.98
Number of holders: 90
Value change: +$42,877,645
Number of buys: 57
Number of sells: 35
Shares outstanding: 37,778,373

Security key

254604101

Report period

Q3 2023

Institutions

Top holders

IRON full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2023 Previous quarter: Q2 2023 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: Q4 2023 Previous quarter: Q2 2023

Recent filing periods:

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024

Ownership snapshot

Top reported holders of IRON - Disc Medicine, Inc. - Common Stock, $0.0001 par value 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

Atlas Venture Life Scienc...

Disclosed value leader

Atlas Venture Life Scienc...

Comparable rows

15/15

Latest evidence

30 Jun 2023

13F 3/4/5 Lead comparable stake: 9.2% Showing 1-6 of 15 holder rows.

Quick read

Atlas Venture Life Science Advisors, LLC leads the comparable SEC ownership view at 9.2%.

15 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 Atlas Venture Life Science Advisors, LLC's linked filing trail.

Comparable ownership Top 5

Atlas Venture Life Science Adviso... 9.2%

ORBIMED ADVISORS LLC 6%

Bain Capital Life Sciences Invest... 3.5%

ADAGE CAPITAL PARTNERS GP, L.L.C. 3.1%

Novo Holdings A/S 2.9%

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
Atlas Venture Life Science Advisors, LLC	13F Company 13F	9.2%	$153,703,210 3,461,784 shares	—	30 Jun 2023
ORBIMED ADVISORS LLC	13F Company 13F	6%	$100,771,883 2,269,637 shares	—	30 Jun 2023
Bain Capital Life Sciences Investors, LLC	13F Company 13F	3.5%	$59,165,131 1,332,548 shares	—	30 Jun 2023
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	3.1%	$51,620,506 1,162,624 shares	—	30 Jun 2023
Novo Holdings A/S	3/4/5 13F 10%+ Owner · Company 3/4/5 13F	2.9% from 13F	$73,790,726 1,090,772 shares	—	28 Jun 2023
PERCEPTIVE ADVISORS LLC	13F Company 13F	2%	$32,982,007 742,838 shares	—	30 Jun 2023

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 Q3 2023

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

Institutions

19,879,838

Rows available

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 Q3 2023 vs Q2 2023 Across Filers

Q2 2023 holders

Q3 2023 holders

Holder diff

Investor	Q2 2023 Shares	Q3 2023 Shares	Share Diff	Share Chg %	Q2 2023 value	Q3 2023 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend