John D. Quisel
Chief Executive Officer at Disc Medicine Inc.
Sits on 2 boards. Last updated September 28, 2026
Time on boards
- Boards served
- 2
- Current seats
- 2
- Board service
- 7 years
- Director since
- 2022
7 years of board service in total across 2 boards, counting each seat separately. Longest: Disc Medicine Inc., 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
-
Disc Medicine Inc. June 18, 202698.6%
-
Gossamer Bio Inc. June 6, 202499.4%
-
Disc Medicine Inc. June 9, 2023100.0%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 15, 2026 | Disc Medicine Inc. | Option exercise | +36,000 | $1.01 | $36,360 |
| Aug 17, 2026 | Disc Medicine Inc. | Option exercise | +33,000 | $13.50 | $445,500 |
| Aug 17, 2026 | Disc Medicine Inc. | Open-market sale | −8,400 | $78.11 | $656,124 |
| Aug 17, 2026 | Disc Medicine Inc. | Open-market sale | −12,712 | $79.20 | $1,006,790 |
| Aug 17, 2026 | Disc Medicine Inc. | Open-market sale | −11,888 | $79.84 | $949,138 |
| Jul 13, 2026 | Disc Medicine Inc. | Option exercise | +25,584 | $9.86 | $252,258 |
| Jul 13, 2026 | Disc Medicine Inc. | Option exercise | +7,416 | $13.50 | $100,116 |
| Jul 13, 2026 | Disc Medicine Inc. | Open-market sale | −9,704 | $74.27 | $720,716 |
| Jul 13, 2026 | Disc Medicine Inc. | Open-market sale | −16,896 | $74.95 | $1,266,355 |
| Jul 13, 2026 | Disc Medicine Inc. | Open-market sale | −6,400 | $76.05 | $486,720 |
| Jun 18, 2026 | Disc Medicine Inc. | Option exercise | +34,000 | $9.86 | $335,240 |
| Jun 18, 2026 | Disc Medicine Inc. | Open-market sale | −22,927 | $69.92 | $1,603,056 |
| Jun 18, 2026 | Disc Medicine Inc. | Open-market sale | −9,522 | $70.70 | $673,205 |
| Jun 18, 2026 | Disc Medicine Inc. | Open-market sale | −1,551 | $71.61 | $111,067 |
| Feb 17, 2026 | Disc Medicine Inc. | Open-market sale | −13,264 | $62.86 | $833,775 |
Questions about John D. Quisel
What boards is John D. Quisel on?
John D. Quisel sits on the boards of Disc Medicine Inc. and Gossamer Bio Inc.
What company is John D. Quisel the CEO of?
John D. Quisel has been Chief Executive Officer of Disc Medicine Inc. since December 2022.
How long has John D. Quisel served on boards?
Our records show at least 7 years of board service across 2 boards, the earliest from 2022.
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