John D. Quisel
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.
Award(A)DirectStock Option (Right to Buy)
10K shares- - Sep 15, 2026IRON
Disc Medicine, Inc.
Exercise(M)Direct36K shares at avg. $1.01$36K - Aug 17, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct12.7K shares at avg. $79.20$1.0M - Aug 17, 2026IRON
Disc Medicine, Inc.
Exercise(M)Direct33K shares at avg. $13.50$446K - Aug 17, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct8.4K shares at avg. $78.11$656K - Aug 17, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct11.9K shares at avg. $79.84$949K - Jul 13, 2026IRON
Disc Medicine, Inc.
Exercise(M)Direct7.4K shares at avg. $13.50$100K - Jul 13, 2026IRON
Disc Medicine, Inc.
Exercise(M)Direct25.6K shares at avg. $9.86$252K - Jul 13, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct9.7K shares at avg. $74.27$721K - Jul 13, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct16.9K shares at avg. $74.95$1.3M - Jul 13, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct6.4K shares at avg. $76.05$487K - Jun 18, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct9.5K shares at avg. $70.70$673K - Jun 18, 2026IRON
Disc Medicine, Inc.
Exercise(M)Direct34K shares at avg. $9.86$335K - Jun 18, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct22.9K shares at avg. $69.92$1.6M - Jun 18, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct1.6K shares at avg. $71.61$111K - Jun 4, 2026GOSS
Gossamer Bio, Inc.
Award(A)DirectStock Option (Right to Buy)
115K shares- - Feb 17, 2026IRON
Disc Medicine, Inc.
Sale(S)Direct13.3K shares at avg. $62.86$834K - Feb 10, 2026IRON
Disc Medicine, Inc.
Award(A)Direct55.2K shares- - Dec 19, 2025IRON
Disc Medicine, Inc.
Exercise(M)Direct12.3K shares at avg. $1.01$12K - Dec 11, 2025IRON
Disc Medicine, Inc.
Sale(S)Direct16.9K shares at avg. $93.65$1.6M - Dec 11, 2025IRON
Disc Medicine, Inc.
Exercise(M)Direct40K shares at avg. $9.86$394K - Dec 11, 2025IRON
Disc Medicine, Inc.
Sale(S)Direct2.4K shares at avg. $90.97$220K - Dec 11, 2025IRON
Disc Medicine, Inc.
Sale(S)Direct4.3K shares at avg. $92.21$400K - Dec 11, 2025IRON
Disc Medicine, Inc.
Sale(S)Direct16.4K shares at avg. $92.96$1.5M - Sep 9, 2025IRON
Disc Medicine, Inc.
Exercise(M)Direct10K shares at avg. $1.01$10K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 23, 2026 |  GOSS Gossamer Bio, Inc. | Award(A) Stock Option (Right to Buy) | 10,000 | - | - | Direct |
| Sep 15, 2026 |  IRON Disc Medicine, Inc. | Exercise(M) | 36,000 | $1.01 | $36,360 | Direct |
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 12,712 | $79.20 | $1,006,729 | Direct |
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Exercise(M) | 33,000 | $13.50 | $445,500 | Direct |
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 8,400 | $78.11 | $656,091 | Direct |
| Aug 17, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 11,888 | $79.84 | $949,162 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Exercise(M) | 7,416 | $13.50 | $100,116 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Exercise(M) | 25,584 | $9.86 | $252,258 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 9,704 | $74.27 | $720,744 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 16,896 | $74.95 | $1,266,303 | Direct |
| Jul 13, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 6,400 | $76.05 | $486,733 | Direct |
| Jun 18, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 9,522 | $70.70 | $673,205 | Direct |
| Jun 18, 2026 | IRON Disc Medicine, Inc. | Exercise(M) | 34,000 | $9.86 | $335,240 | Direct |
| Jun 18, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 22,927 | $69.92 | $1,603,019 | Direct |
| Jun 18, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 1,551 | $71.61 | $111,071 | Direct |
| Jun 4, 2026 | GOSS Gossamer Bio, Inc. | Award(A) Stock Option (Right to Buy) | 115,000 | - | - | Direct |
| Feb 17, 2026 | IRON Disc Medicine, Inc. | Sale(S) | 13,264 | $62.86 | $833,775 | Direct |
| Feb 10, 2026 | IRON Disc Medicine, Inc. | Award(A) | 55,200 | - | $0 | Direct |
| Dec 19, 2025 | IRON Disc Medicine, Inc. | Exercise(M) | 12,300 | $1.01 | $12,423 | Direct |
| Dec 11, 2025 | IRON Disc Medicine, Inc. | Sale(S) | 16,888 | $93.65 | $1,581,549 | Direct |
| Dec 11, 2025 | IRON Disc Medicine, Inc. | Exercise(M) | 40,000 | $9.86 | $394,400 | Direct |
| Dec 11, 2025 | IRON Disc Medicine, Inc. | Sale(S) | 2,419 | $90.97 | $220,064 | Direct |
| Dec 11, 2025 | IRON Disc Medicine, Inc. | Sale(S) | 4,337 | $92.21 | $399,920 | Direct |
| Dec 11, 2025 | IRON Disc Medicine, Inc. | Sale(S) | 16,356 | $92.96 | $1,520,398 | Direct |
| Sep 9, 2025 | IRON Disc Medicine, Inc. | Exercise(M) | 10,000 | $1.01 | $10,100 | Direct |
1-25 of 47 transactions
About Quisel John D
Quisel John D (SEC CIK 0001586788) files insider reports with the SEC as Director of Gossamer Bio, Inc. (GOSS) and Chief Executive Officer of Disc Medicine, Inc. (IRON).
Signal8 holds 20 ownership filings by Quisel John D, all Form 4s, filed between Dec 18, 2024 and Sep 25, 2026. Those filings report 47 transactions, from Dec 16, 2024 to Sep 23, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Quisel John D's filings is in WATERTOWN, MA.
Recent filings by Quisel John D
- Sep 23, 2026: Grant or award of GOSS derivative securities (Form 4, code A).
- Sep 15, 2026: Option exercise of IRON shares (Form 4, code M).
- Aug 17, 2026: Open-market sale of IRON shares (Form 4, code S).
- Aug 17, 2026: Option exercise of IRON shares (Form 4, code M).
- Aug 17, 2026: Open-market sales of IRON shares (2 lines, Form 4, code S).
Other insiders filing for Gossamer Bio, Inc. (GOSS)
- Milligan Sandra, Director
- Daniel Thomas O, Director
- Ciongoli Gregory Austin, Director
- Drynan Skye, Director
- Cox Russell J., Director
- Nathan Steven D, Director