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Palo Alto Investors LP
> BIIB
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | BIOGEN INC. | BIIB | 381,282 | 0 | 108,608,178,000 | 2,600,344,000 | $284,850.00 |
| 03/31/2023 | BIOGEN INC. | BIIB | 381,282 | 1,200 | 106,007,834,000 | 755,527,000 | $278,030.00 |
| 12/31/2022 | BIOGEN INC. | BIIB | 380,082 | 19,101 | 105,252,307,000 | 105,155,925,000 | $276,920.00 |
| 09/30/2022 | BIOGEN INC. | BIIB | 360,981 | 0 | 96,382,000 | 22,764,000 | $267.00 |
| 06/30/2022 | BIOGEN INC. | BIIB | 360,981 | 0 | 73,618,000 | -2,405,000 | $203.94 |
| 03/31/2022 | BIOGEN INC. | BIIB | 360,981 | -24,019 | 76,023,000 | -16,346,000 | $210.60 |
| 12/31/2021 | BIOGEN INC. | BIIB | 385,000 | 23,400 | 92,369,000 | -9,960,000 | $239.92 |
| 09/30/2021 | BIOGEN INC. | BIIB | 361,600 | 0 | 102,329,000 | -22,882,000 | $282.99 |
| 06/30/2021 | BIOGEN INC. | BIIB | 361,600 | 18,400 | 125,211,000 | 29,201,000 | $346.27 |
| 03/31/2021 | BIOGEN INC. | BIIB | 343,200 | 108,900 | 96,010,000 | 38,639,000 | $279.75 |
| 12/31/2020 | BIOGEN INC. | BIIB | 234,300 | 20,508 | 57,371,000 | 46,570,000 | $244.86 |
| 09/30/2009 | BIOGEN INC. | BIIB | 213,792 | -3,595 | 10,801,000 | 986,000 | $50.52 |
| 06/30/2009 | BIOGEN INC. | BIIB | 217,387 | -72,000 | 9,815,000 | -5,355,000 | $45.15 |
| 03/31/2009 | BIOGEN INC. | BIIB | 289,387 | -28,881 | 15,170,000 | 11,000 | $52.42 |
| 12/31/2008 | BIOGEN INC. | BIIB | 318,268 | 83,270 | 15,159,000 | 3,341,000 | $47.63 |
| 09/30/2008 | BIOGEN INC. | BIIB | 234,998 | 234,998 | 11,818,000 | 11,818,000 | $50.29 |
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