David S. Grayzel serves as Executive at Surface Oncology, Inc., where they oversee executive responsibilities. Since joining the company, David S. Grayzel has executed 9 insider transactions totaling $53.9M, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 15, 2026 involved receiving (via award) 16,363 shares valued at $45.0K.
David S. Grayzel currently holds 16,363 shares of Surface Oncology, Inc. (SURF), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, David S. Grayzel has been a net seller of SURF stock. They have purchased $9.0M and sold $44.9M worth of shares.
David S. Grayzel's most recent insider trade was on Jan 15, 2026, when they sold 16,363 shares at $2.75 per share.
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| $28.15 |
| Discretionary |
| Sep 8, 2023 | SURF | $0 | Disposition | 2,945,453 | $N/A | Discretionary |
| Jul 2, 2021 | AVTE | $7.5M | Purchase | 535,714 | $14.00 | Discretionary |
| Jul 2, 2021 | AVTE | $0 | Conversion | 2,568,165 | $N/A | Discretionary |
| Dec 17, 2020 | SURF | $30.8M | Sale | 1,700,000 | $18.10 | Discretionary |
| Dec 17, 2020 | SURF | $13.8M | Sale | 1,700,000 | $8.10 | Discretionary |
| Apr 23, 2018 | SURF | $1.5M | Purchase | 100,000 | $15.00 | Discretionary |
| Apr 23, 2018 | SURF | $0 | Conversion | 3,181,817 | $N/A | Discretionary |