Yu Jonathan Yen-Wen 4

What Happened
Yu Jonathan Yen-Wen, Chief Operating Officer of Disc Medicine (IRON), exercised 300 stock options at $13.50 each (cost $4,050) on June 26, 2026, and sold 300 common shares in an open-market transaction the same day at $72.50 each, generating $21,750 in gross proceeds. The filing also records a related derivative conversion/disposition of 300 shares at $0.

Key Details

• Date of transactions: 2026-06-26 (filed on 2026-06-30; filing appears timely).
• Exercise (code M): 300 shares acquired at $13.50 per share — total exercise cost $4,050.
• Sale (code S): 300 shares sold at $72.50 per share — total proceeds $21,750.
• Derivative line: 300 shares recorded as disposed at $0 (listed separately in the filing).
• Plan note: Transactions were effected under a Rule 10b5-1 trading plan adopted March 17, 2026 (footnote F1).
• Vesting note: Underlying option shares vest in 48 equal monthly installments beginning Dec 29, 2022 (footnote F2).
• Shares owned after the transactions: not specified in this filing.

Context
Because the options were exercised and shares sold the same day, this is effectively a cashless exercise where the insider converted options to shares and sold them immediately. The use of a 10b5-1 plan indicates the trades were prearranged, which is common for avoiding timing questions but does not speak to the insider’s view of the company.