InsiderTrades

Form 4 for IRON Disc Medicine, Inc.

Accepted 2025-10-09 00:00:00 ET · period of report 2025-10-07 · accession 0001591747-25-000004 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X Filed Traded Ticker Insider Title Type Price Qty Owned ΔOwn Value
MI 2025-10-09 2025-10-07+ IRON Bitterman Kevin Dir S - Sale $70.14 -90.0K 500.6K -15% -$6.31M

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2025-10-08 S D 12,386 $69.31 551,977 I See footnote — — (F5) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.0173 to $69.9882 inclusive. (F2) These shares are held by Atlas Venture Opportunity Fund I, LP ("Opportunity I"). The general partner of Opportunity I is Atlas Venture Associates Opportunity I, LP ("Associates I"). Atlas Venture Associates Opportunity I, LLC ("Associates I LLC") is the general partner of Associates I. The Reporting Person is a member of Associates I LLC and disclaims beneficial ownership of such securities held by Opportunity I, except to the extent of his pecuniary interest therein, if any.
2 Common Common Stock 2025-10-07 S D 6,661 $69.01 572,582 I See footnote — — (F3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $69.00 to $69.08 inclusive. (F2) These shares are held by Atlas Venture Opportunity Fund I, LP ("Opportunity I"). The general partner of Opportunity I is Atlas Venture Associates Opportunity I, LP ("Associates I"). Atlas Venture Associates Opportunity I, LLC ("Associates I LLC") is the general partner of Associates I. The Reporting Person is a member of Associates I LLC and disclaims beneficial ownership of such securities held by Opportunity I, except to the extent of his pecuniary interest therein, if any.
3 Common Common Stock 2025-10-08 S D 25,400 $70.54 526,577 I See footnote — — (F6) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $70.0293 to $71.028 inclusive. (F2) These shares are held by Atlas Venture Opportunity Fund I, LP ("Opportunity I"). The general partner of Opportunity I is Atlas Venture Associates Opportunity I, LP ("Associates I"). Atlas Venture Associates Opportunity I, LLC ("Associates I LLC") is the general partner of Associates I. The Reporting Person is a member of Associates I LLC and disclaims beneficial ownership of such securities held by Opportunity I, except to the extent of his pecuniary interest therein, if any.
4 Common Common Stock 2025-10-08 S D 12,689 $71.51 513,888 I See footnote — — (F7) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $71.03 to $72.0233 inclusive. (F2) These shares are held by Atlas Venture Opportunity Fund I, LP ("Opportunity I"). The general partner of Opportunity I is Atlas Venture Associates Opportunity I, LP ("Associates I"). Atlas Venture Associates Opportunity I, LLC ("Associates I LLC") is the general partner of Associates I. The Reporting Person is a member of Associates I LLC and disclaims beneficial ownership of such securities held by Opportunity I, except to the extent of his pecuniary interest therein, if any.
5 Common Common Stock 2025-10-07 S D 11,378 $68.01 579,243 I See footnote — — (F1) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.00 to $68.12 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (1), (3), (4), (5), (6), (7) and (8). (F2) These shares are held by Atlas Venture Opportunity Fund I, LP ("Opportunity I"). The general partner of Opportunity I is Atlas Venture Associates Opportunity I, LP ("Associates I"). Atlas Venture Associates Opportunity I, LLC ("Associates I LLC") is the general partner of Associates I. The Reporting Person is a member of Associates I LLC and disclaims beneficial ownership of such securities held by Opportunity I, except to the extent of his pecuniary interest therein, if any.
6 Common Common Stock 2025-10-08 S D 8,219 $68.26 564,363 I See footnote — — (F4) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.01 to $69.00 inclusive. (F2) These shares are held by Atlas Venture Opportunity Fund I, LP ("Opportunity I"). The general partner of Opportunity I is Atlas Venture Associates Opportunity I, LP ("Associates I"). Atlas Venture Associates Opportunity I, LLC ("Associates I LLC") is the general partner of Associates I. The Reporting Person is a member of Associates I LLC and disclaims beneficial ownership of such securities held by Opportunity I, except to the extent of his pecuniary interest therein, if any.
7 Common Common Stock 2025-10-08 S D 13,267 $72.39 500,621 I See footnote — — (F8) The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $72.0474 to $72.6152 inclusive. (F2) These shares are held by Atlas Venture Opportunity Fund I, LP ("Opportunity I"). The general partner of Opportunity I is Atlas Venture Associates Opportunity I, LP ("Associates I"). Atlas Venture Associates Opportunity I, LLC ("Associates I LLC") is the general partner of Associates I. The Reporting Person is a member of Associates I LLC and disclaims beneficial ownership of such securities held by Opportunity I, except to the extent of his pecuniary interest therein, if any.