Yu Jonathan Yen-Wen 4

What Happened

• Jonathan Yen-Wen, Chief Operating Officer of Disc Medicine (IRON), exercised stock options to acquire 18,612 shares (5,261 + 13,351) at $9.86 per share (total cost $183,514) on June 16, 2026, and sold the same 18,612 shares in open-market transactions the same day for aggregate proceeds of $1,287,801.
• The filing shows the option positions were converted (reported as derivative dispositions at $0) and the open-market sales (11,651 shares at a weighted $68.76 and 6,961 shares at a weighted $69.92) completed under a pre-established Rule 10b5-1 trading plan.

Key Details

• Transaction date: June 16, 2026; Form 4 filed June 18, 2026 (timely).
• Option exercise: 18,612 shares at $9.86 each; total exercise cost $183,514.
• Open-market sales: 18,612 shares for total proceeds $1,287,801 (11,651 shares at weighted $68.76, range $68.37–$69.36; 6,961 shares at weighted $69.92, range $69.40–$70.19).
• Footnotes: Transactions effected under a Rule 10b5-1 trading plan adopted March 17, 2026. Reporting person will provide breakdown of shares sold at each price on request. Options underlying these shares were fully vested as of the date.
• Shares owned after transaction: not specified in the provided filing excerpt.

Context

• This was an exercise of vested options followed by immediate open-market sales — a common cashless-exercise pattern where exercised shares are sold to cover exercise cost/taxes or to monetize gains. The use of a 10b5-1 plan indicates the trades were pre-planned and intended to comply with insider trading rules.
• These are routine insider sales following option exercises and do not, by themselves, indicate company-wide sentiment.