Disc Medicine (IRON) CEO John Quisel Exercises Options

What Happened

• John D. Quisel, CEO of Disc Medicine (IRON), exercised stock options on 2026-09-15. The Form 4 reports acquisition of 36,000 shares at an exercise price of $1.01 per share, for a total cash outlay of $36,360.
• The filing also shows a simultaneous reported disposition of 36,000 shares at $0.00 (no cash reported). The Form 4 does not explain the reason for the $0.00 disposition.
• Footnote F1 notes the options underlying this exercise were fully vested and exercisable as of the date of exercise.

Key Details

• Transaction date: 2026-09-15; Form 4 filed: 2026-09-16 (timely filing).
• Acquired: 36,000 shares @ $1.01 = $36,360 (transaction code M = option exercise).
• Disposed: 36,000 shares @ $0.00 = $0 (reported as a derivative disposition; reason not specified in the filing).
• Shares owned after the transaction: not specified in the provided filing summary.
• Footnote: F1 — options were fully vested and exercisable as of the date reported.
• Filing timeliness: appears timely (no late filing indicated).

Context

• For option exercises, it’s common to see matching entries where shares are surrendered or withheld to cover the exercise price or tax withholding; this filing shows a $0.00 disposition but does not state the mechanism (cashless exercise, net share settlement, or surrender for taxes). The reported acquisition indicates an insider purchase of shares through exercising vested options, which is different from an open-market purchase or sale.