Quisel John D 4

What Happened

• John D. Quisel, CEO of Disc Medicine (ticker: IRON), disposed of 13,264 shares on February 17, 2026. The shares were sold at $62.86 each for proceeds of approximately $833,775. This transaction is a sale and was executed as a "sell-to-cover" to satisfy tax withholding obligations tied to vested restricted stock units, not a discretionary sell for investment reasons.

Key Details

• Transaction date and price: 2026-02-17, 13,264 shares at $62.86 per share.
• Total proceeds: about $833,775.
• Transaction type/code: Sale (S) — sell-to-cover related to RSU vesting (footnote F1).
• Shares owned after transaction: not disclosed in this Form 4 filing.
• Filing timeliness: Reported on the same date (no late filing indicated).
• Footnote: The sale was to cover tax withholding on vested restricted stock units and "does not represent a discretionary transaction by the Reporting Person."

Context

• Sell-to-cover transactions are routine tax-related sales when equity awards vest; they generally do not signal a CEO’s change in view about the company. No options were exercised and no open-market discretionary purchases were reported in this filing.