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Avidity Partners Management LP
> BIIB
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | BIOGEN INC. | BIIB | 174,000 | 45,200 | 49,563,900,000 | 13,753,636,000 | $284,850.00 |
| 03/31/2023 | BIOGEN INC. | BIIB | 128,800 | 128,800 | 35,810,264,000 | 35,810,264,000 | $278,030.00 |
| 12/31/2022 | BIOGEN INC. | BIIB | 0 | -600,000 | 0 | -160,200,000 | |
| 09/30/2022 | BIOGEN INC. | BIIB | 600,000 | 159,434 | 160,200,000 | 70,351,000 | $267.00 |
| 06/30/2022 | BIOGEN INC. | BIIB | 440,566 | 75,566 | 89,849,000 | 12,980,000 | $203.94 |
| 03/31/2022 | BIOGEN INC. | BIIB | 365,000 | 365,000 | 76,869,000 | 76,869,000 | $210.60 |
| 09/30/2021 | BIOGEN INC. | BIIB | 0 | -183,900 | 0 | -63,679,000 | |
| 06/30/2021 | BIOGEN INC. | BIIB | 183,900 | 183,900 | 63,679,000 | 63,679,000 | $346.27 |
| 12/31/2020 | BIOGEN INC. | BIIB | 0 | -315,100 | 0 | -89,388,000 | |
| 09/30/2020 | BIOGEN INC. | BIIB | 315,100 | 315,100 | 89,388,000 | 89,388,000 | $283.68 |
| 06/30/2020 | BIOGEN INC. | BIIB | 0 | -62,000 | 0 | -19,616,000 | |
| 03/31/2020 | BIOGEN INC. | BIIB | 62,000 | 62,000 | 19,616,000 | 19,616,000 | $316.39 |
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