Form 4: Disc Medicine CEO Sells Shares
Insider Transaction (Form 4)
John D Quisel, Chief Executive Officer and a Director of Disc Medicine, Inc., sold 33,000 shares of common stock on August 17, 2026.
Summary
- Option exercise/conversion: acquired 33,000 Common Stock at $13.50 ($445,500) on August 17, 2026; holds 259,064 after (Direct).
- Open-market sale: disposed of 8,400 Common Stock at $78.11 ($656,091) on August 17, 2026; holds 250,664 after (Direct).
- Open-market sale: disposed of 12,712 Common Stock at $79.20 ($1,006,729) on August 17, 2026; holds 237,952 after (Direct).
- Open-market sale: disposed of 11,888 Common Stock at $79.84 ($949,162) on August 17, 2026; holds 226,064 after (Direct).
- Option exercise/conversion: disposed of 33,000 Stock Option (Right to Buy) on August 17, 2026; holds 91,586 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $2,611,982 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
John D Quisel — Director, Officer (Chief Executive Officer)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-08-17 | Option exercise/conversion | Common Stock | 33,000 | $14 | $445.5K | 259,064 |
| 2026-08-17 | Open-market sale | Common Stock | 8,400 | $78 | $656.1K | 250,664 |
| 2026-08-17 | Open-market sale | Common Stock | 12,712 | $79 | $1.0M | 237,952 |
| 2026-08-17 | Open-market sale | Common Stock | 11,888 | $80 | $949.2K | 226,064 |
| 2026-08-17 | Option exercise/conversion | Stock Option (Right to Buy) | 33,000 | — | — | 91,586 |
Key Dates
| Date | Description |
|---|---|
| 2026-08-17 | Option exercise/conversion (33,000 shares) |
| 2026-08-17 | Open-market sale (8,400 shares) |
| 2026-08-17 | Open-market sale (12,712 shares) |
| 2026-08-17 | Open-market sale (11,888 shares) |
| 2026-08-17 | Option exercise/conversion (33,000 shares) |
Keywords
insider transaction, Form 4, IRON, Disc Medicine, Inc., bearish, John D Quisel
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