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ORBIMED ADVISORS LLC
> MRSN
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | Mersana Therapeutics, Inc. | MRSN | 7,214,937 | -1,796,500 | 23,737,143,000 | -13,299,863,000 | $3,290.00 |
| 03/31/2023 | Mersana Therapeutics, Inc. | MRSN | 9,011,437 | 0 | 37,037,006,000 | -15,770,015,000 | $4,110.00 |
| 12/31/2022 | Mersana Therapeutics, Inc. | MRSN | 9,011,437 | 0 | 52,807,021,000 | 52,746,104,000 | $5,860.00 |
| 09/30/2022 | Mersana Therapeutics, Inc. | MRSN | 9,011,437 | 0 | 60,917,000 | 19,284,000 | $6.76 |
| 06/30/2022 | Mersana Therapeutics, Inc. | MRSN | 9,011,437 | 4,222,537 | 41,633,000 | 22,525,000 | $4.62 |
| 03/31/2022 | Mersana Therapeutics, Inc. | MRSN | 4,788,900 | 1,900,053 | 19,108,000 | 1,139,000 | $3.99 |
| 12/31/2021 | Mersana Therapeutics, Inc. | MRSN | 2,888,847 | 88,600 | 17,969,000 | -20,058,000 | $6.22 |
| 06/30/2021 | Mersana Therapeutics, Inc. | MRSN | 2,800,247 | 907,747 | 38,027,000 | 7,406,000 | $13.58 |
| 03/31/2021 | Mersana Therapeutics, Inc. | MRSN | 1,892,500 | 1,119,152 | 30,621,000 | 10,042,000 | $16.18 |
| 12/31/2020 | Mersana Therapeutics, Inc. | MRSN | 773,348 | -555,504 | 20,579,000 | -4,164,000 | $26.61 |
| 09/30/2020 | Mersana Therapeutics, Inc. | MRSN | 1,328,852 | -581,156 | 24,743,000 | -19,951,000 | $18.62 |
| 06/30/2020 | Mersana Therapeutics, Inc. | MRSN | 1,910,008 | 563,287 | 44,694,000 | 36,843,000 | $23.40 |
| 03/31/2020 | Mersana Therapeutics, Inc. | MRSN | 1,346,721 | -726,598 | 7,851,000 | -4,029,000 | $5.83 |
| 12/31/2019 | Mersana Therapeutics, Inc. | MRSN | 2,073,319 | 182,200 | 11,880,000 | 8,892,000 | $5.73 |
| 09/30/2019 | Mersana Therapeutics, Inc. | MRSN | 1,891,119 | 0 | 2,988,000 | -4,671,000 | $1.58 |
| 06/30/2019 | Mersana Therapeutics, Inc. | MRSN | 1,891,119 | 0 | 7,659,000 | -2,288,000 | $4.05 |
| 03/31/2019 | Mersana Therapeutics, Inc. | MRSN | 1,891,119 | 1,891,119 | 9,947,000 | 9,947,000 | $5.26 |
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