Insider · CIK 0001732786
David S. Grayzel
Files at: QTTB, SURF. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Apr 23, 2018 PForm 4 → | Apr 23, 4:18 pm EDT | Surface Oncology, Inc.SURF | 100,000 | $15.00 | $1,500,000 | 4,645,453 | +2.20% | plan? |
| Apr 23, 2018 CForm 4 → | Apr 23, 4:18 pm EDT | Surface Oncology, Inc.SURF | 3,181,817 | — | — | 4,545,453 | — | plan? |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Jun 12, 2026 AForm 4/A → | Jul 21, 8:24 pm EDT | Q32 Bio Inc.QTTB | 10,826 | — | — | 10,826 | — | |
| Jun 12, 2026 AForm 4 → | Jun 16, 4:30 pm EDT | Q32 Bio Inc.QTTB | 9,810 | — | — | 9,810 | — | amended |
| Apr 23, 2018 CForm 4 → | Apr 23, 4:18 pm EDT | Surface Oncology, Inc.SURF | 7,000,000 | — | — | 0 | — |