Disc Medicine (IRON) COO Yu Jonathan Yen-Wen Exercises Options, Sells 804 Shares

What Happened

• Yu Jonathan Yen-Wen, Chief Operating Officer of Disc Medicine (IRON), exercised 804 stock option shares (code M) at an exercise price of $13.50 per share (total cost $10,854) and immediately sold those 804 shares in the open market for a weighted-average price of $82.64 per share, generating gross proceeds of $66,445. The net cash difference (proceeds minus exercise cost) is approximately $55,591 pre-tax and fees. The transactions were reported for activity on August 12, 2026 and were filed with the SEC on August 14, 2026.

Key Details

• Transaction date: August 12, 2026 (reported Aug 14, 2026)
• Exercise: 804 shares exercised at $13.50 each (total $10,854)
• Sale: 804 shares sold at weighted-average $82.64 (total $66,445); sale prices ranged $82.54–$82.83 (filing offers breakdown on request)
• Net proceeds (approx.): $66,445 − $10,854 = $55,591 (pre-tax)
• Shares owned after the transaction: not disclosed in the provided filing excerpt
• Footnotes:
  • Transactions were executed pursuant to a Rule 10b5-1 trading plan adopted March 17, 2026 (F1).
  • The sale price shown is a weighted average; individual sale prices ranged from $82.54 to $82.83 (F2).
  • The underlying option vests monthly over 48 installments starting Dec 29, 2022 (F3).
• Filing timeliness: Reported on Aug 14 for Aug 12 activity; no late-filing flag in the provided record.

Context

• This was an option exercise followed by an immediate sale (commonly a cashless exercise), meaning the insider converted vested options into stock and sold those shares rather than holding them. Sales by insiders can be routine (e.g., for liquidity or tax obligations) and are not by themselves evidence of company performance.