Yu Jonathan Yen-Wen 4

What Happened

• Jonathan Yen-Wen, Chief Operating Officer of Disc Medicine (IRON), recorded an option exercise and an open-market sale on July 7, 2026. He exercised 100 option shares by paying $13.50 per share (total cost $1,350) and sold 100 shares in the open market at $82.50 per share for total proceeds of $8,250. The filing also shows a derivative conversion/disposition of 100 shares at $0.00 on the same date.

Key Details

• Transaction date: July 7, 2026; Form 4 filed July 9, 2026 (appears timely).
• Exercise: 100 shares exercised at $13.50 each — $1,350 total outlay.
• Sale: 100 shares sold in open market at $82.50 each — $8,250 proceeds.
• Derivative disposition: 100 shares reported disposed at $0.00 (see footnote F2 for vesting terms).
• Footnotes: F1 — transactions effected pursuant to a Rule 10b5-1 trading plan adopted March 17, 2026. F2 — underlying option vests in 48 equal monthly installments beginning Dec 29, 2022, subject to continued service.
• Shares owned after the transactions: not specified in the provided excerpt of the Form 4 (see full filing for beneficial ownership totals).

Context

• The exercise and sale occurred the same day, which is commonly how executives monetize vested options (the filing shows both an exercise (M) and an open-market sale (S) on 7/7). Because the sale was executed under a Rule 10b5-1 trading plan (F1), the trades were prearranged and are typically routine rather than a discretionary immediate market-timing decision.