| Date | Name | Symbol | Type | Security | Shares | Price | Value | Ownership | Reported |
| 10/02/2023 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 9.5k | $1.26 | $12k | | 10/02/2023 |
| 07/03/2023 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 3.7k | $3.42 | $12.5k | | 07/03/2023 |
| 06/08/2023 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 18.4k | $8.64 | $158.6k | | 06/08/2023 |
| 06/08/2023 | Mersana Therapeutics, Inc. | MRSN | Grant | Common Stock | 14.5k | $0.00 | $0 | | 06/08/2023 |
| 04/03/2023 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 3.5k | $4.25 | $14.7k | | 04/03/2023 |
| 06/21/2022 | Graphite Bio, Inc. | | Grant | Stock Option (right to buy) | 20k | $2.54 | $50.8k | | 06/21/2022 |
| 06/09/2022 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 45k | $3.62 | $162.9k | | 06/09/2022 |
| 01/03/2022 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 10.4k | $6.44 | $67.1k | | 01/03/2022 |
| 06/11/2021 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 25k | $14.90 | $373.2k | | 06/11/2021 |
| 01/15/2021 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 2.5k | $21.09 | $53.7k | | 01/15/2021 |
| 01/02/2020 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 11.3k | $5.36 | $60.4k | | 01/02/2020 |
| 06/07/2019 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 25k | $4.31 | $107.8k | | 06/07/2019 |
| 06/06/2019 | Arcus Biosciences, Inc. | RCUS | Grant | Stock Option (Right to buy) | 35k | $7.99 | $279.6k | | 06/06/2019 |
| 10/19/2018 | Arcus Biosciences, Inc. | RCUS | Grant | Stock Option (right to buy) | 35k | $11.79 | $412.6k | | 10/19/2018 |
| 09/20/2018 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 10k | $12.27 | $122.7k | | 09/20/2018 |
| 01/02/2018 | Mersana Therapeutics, Inc. | MRSN | Grant | Stock Option (right to buy) | 3.6k | $17.39 | $61.9k | | 01/02/2018 |