Insider · CIK 0001814617
Donald William Nicholson
Files at GBIO (Generation Bio Co.), IRON (Disc Medicine, Inc.). First filing Dec 5, 2023, latest Dec 5, 2023.
In brief
Donald William Nicholson files SEC Form 4 as director at GBIO (Generation Bio Co.), and also at IRON (Disc Medicine, Inc.). Since Dec 5, 2023, Donald William Nicholson has reported 1 open-market buy worth $144k and 0 open-market sells worth $0, the latest filed on Dec 5, 2023.
A track record needs three past buys with six months of prices behind them; Donald William Nicholson has 0, so none is measured yet.
The newest scored trade: bought $144k of GBIO on Dec 1, 2023, filed Dec 5, 2023, scored 51 (moderate).
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 51Moderate | Generation Bio Co. | $144k 100,000 shares | +88% | - |
Transactions
Every row this insider has filed, 11 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Jun 18, 2026 | IRON Disc Medicine, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +6,212 | $0.00 | $0 | 6,212 | Jun 23, 2026 |
| Feb 9, 2026 | GBIO Generation Bio Co. | UTender of shares Common Stock | -21,357 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | GBIO Generation Bio Co. | DDisposition to issuer Stock Option (right to buy)derivative | -3,000 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | GBIO Generation Bio Co. | DDisposition to issuer Stock Option (right to buy)derivative | -5,200 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | GBIO Generation Bio Co. | DDisposition to issuer Stock Option (right to buy)derivative | -1,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | GBIO Generation Bio Co. | DDisposition to issuer Stock Option (right to buy)derivative | -1,920 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | GBIO Generation Bio Co. | DDisposition to issuer Stock Option (right to buy)derivative | -2,500 | - | - | 0 | Feb 9, 2026 |
| Feb 9, 2026 | GBIO Generation Bio Co. | DDisposition to issuer Stock Option (right to buy)derivative | -6,000 | - | - | 0 | Feb 9, 2026 |
| Jun 11, 2025 | IRON Disc Medicine, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +10,000 | $0.00 | $0 | 10,000 | Jun 13, 2025 |
| Jun 4, 2025 | GBIO Generation Bio Co. | AGrant or award Stock Option (right to buy)derivative | +30,000 | $0.00 | $0 | 30,000 | Jun 6, 2025 |
| Dec 1, 2023 | GBIO Generation Bio Co. | POpen-market purchase Common Stock | +100,000 | $1.44 | $144k | 213,576 | Dec 5, 2023 |
Questions about Donald William Nicholson
Answered from the filings on this page, as of the latest one.
Is Donald William Nicholson buying or selling?
Not in the last 12 months. Donald William Nicholson's latest open-market trade on SEC Form 4 was bought $144k of GBIO on Dec 1, 2023.
How did Donald William Nicholson's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Donald William Nicholson has 0.
Where does Donald William Nicholson file Form 4?
Donald William Nicholson has filed Form 4 at GBIO (Generation Bio Co.); IRON (Disc Medicine, Inc.). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.