Nicholson Donald William
SEC insider (Form 3/4/5 filer). CIK 0001814617. Director at Disc Medicine, Inc. (IRON) and 1 other issuer. 10 reported Form 4/5 transactions since Sep 2024; latest on Jun 18, 2026. Located in WATERTOWN, MA.
Companies Nicholson Donald William has filed insider reports for
- Disc Medicine, Inc. (IRON): Director
- Generation Bio Co. (GBIO): Director
Nicholson Donald William
CIK: 0001814617
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 (10 total)
- Jun 18, 2026IRON
Disc Medicine, Inc.
AwardDirectStock Option (Right to Buy)
6.2K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
6K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
2.5K shares- - Feb 9, 2026GBIO
Generation Bio Co.
Tender OfferDirect21.4K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
3K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
5.2K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
1.5K shares- - Feb 9, 2026GBIO
Generation Bio Co.
DispositionDirectStock Option (right to buy)
1.9K shares- - Jun 11, 2025IRON
Disc Medicine, Inc.
AwardDirectStock Option (Right to Buy)
10K shares- - Jun 4, 2025GBIO
Generation Bio Co.
AwardDirectStock Option (right to buy)
30K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 18, 2026 |  IRON Disc Medicine, Inc. | Award Stock Option (Right to Buy) | 6,212 | - | - | Direct |
| Feb 9, 2026 |  GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 6,000 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 2,500 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Tender Offer | 21,357 | - | $0 | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 3,000 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 5,200 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 1,500 | - | - | Direct |
| Feb 9, 2026 | GBIO Generation Bio Co. | Disposition Stock Option (right to buy) | 1,920 | - | - | Direct |
| Jun 11, 2025 | IRON Disc Medicine, Inc. | Award Stock Option (Right to Buy) | 10,000 | - | - | Direct |
| Jun 4, 2025 | GBIO Generation Bio Co. | Award Stock Option (right to buy) | 30,000 | - | - | Direct |
1-10 of 10 transactions