Quisel John D
SEC insider (Form 3/4/5 filer). CIK 0001586788. Director at Gossamer Bio, Inc. (GOSS) and 1 other issuer. 47 reported Form 4/5 transactions since Sep 2024; latest on Sep 23, 2026. Located in WATERTOWN, MA.
Companies Quisel John D has filed insider reports for
- Gossamer Bio, Inc. (GOSS): Director
- Disc Medicine, Inc. (IRON): Director, Officer, Chief Executive Officer
Quisel John D
CIK: 0001586788
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (47 total)
- Sep 23, 2026GOSS
Gossamer Bio, Inc.
AwardDirectStock Option (Right to Buy)
10K shares- - Sep 15, 2026IRON
Disc Medicine, Inc.
ExerciseDirect36K shares at avg. $1.01$36K - Aug 17, 2026IRON
Disc Medicine, Inc.
ExerciseDirect33K shares at avg. $13.50$446K - Aug 17, 2026IRON
Disc Medicine, Inc.
SaleDirect12.7K shares at avg. $79.20$1.0M - Aug 17, 2026IRON
Disc Medicine, Inc.
SaleDirect8.4K shares at avg. $78.11$656K - Aug 17, 2026IRON
Disc Medicine, Inc.
SaleDirect11.9K shares at avg. $79.84$949K - Jul 13, 2026IRON
Disc Medicine, Inc.
ExerciseDirect7.4K shares at avg. $13.50$100K - Jul 13, 2026IRON
Disc Medicine, Inc.
ExerciseDirect25.6K shares at avg. $9.86$252K - Jul 13, 2026IRON
Disc Medicine, Inc.
SaleDirect9.7K shares at avg. $74.27$721K - Jul 13, 2026IRON
Disc Medicine, Inc.
SaleDirect16.9K shares at avg. $74.95$1.3M
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 23, 2026 |  GOSS Gossamer Bio, Inc. | Award Stock Option (Right to Buy) | 10,000 | - | - | Direct |
| Sep 15, 2026 |  IRON Disc Medicine, Inc. | Exercise | 36,000 | $1.01 | $36,360 | Direct |
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Exercise | 33,000 | $13.50 | $445,500 | Direct |
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Sale | 12,712 | $79.20 | $1,006,729 | Direct |
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Sale | 8,400 | $78.11 | $656,091 | Direct |
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Sale | 11,888 | $79.84 | $949,162 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Exercise | 7,416 | $13.50 | $100,116 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Exercise | 25,584 | $9.86 | $252,258 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Sale | 9,704 | $74.27 | $720,744 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Sale | 16,896 | $74.95 | $1,266,303 | Direct |
1-10 of 47 transactions