| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 06/18/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 7.2k | $6.04 | $43.6k | | 06/18/2021 |
| 06/16/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 3.6k | $6.18 | $22.1k | | 06/16/2021 |
| 05/28/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Other (disposition) | Common Stock | 68.5k | $0.00 | $0 | See footnote | 05/28/2021 |
| 05/18/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 25k | $6.97 | $174.3k | | 05/18/2021 |
| 03/29/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 17.5k | $10.94 | $191.1k | | 03/29/2021 |
| 03/29/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 15.8k | $11.40 | $179.6k | | 03/29/2021 |
| 03/26/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 3.5k | $12.15 | $42.3k | | 03/25/2021 |
| 03/25/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 10k | $12.35 | $123.9k | | 03/25/2021 |
| 01/27/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 1.7k | $13.05 | $22.2k | | 01/27/2021 |
| 01/19/2021 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 500 | $13.09 | $6.5k | | 01/19/2021 |
| 12/29/2020 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 443 | $14.16 | $6.3k | | 12/29/2020 |
| 12/22/2020 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 5.1k | $14.64 | $74.7k | | 12/22/2020 |
| 12/16/2020 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 4.8k | $14.62 | $70.2k | | 12/15/2020 |
| 12/15/2020 | Checkmate Pharmaceuticals, Inc. | CMPI | Purchase | Common Stock | 42 | $14.49 | $608.6 | | 12/15/2020 |