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Iguana Healthcare Management, LLC
> BIIB
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2018 | BIOGEN INC. | BIIB | 17,500 | -4,500 | 4,792,000 | -2,217,000 | $273.83 |
| 12/31/2017 | BIOGEN INC. | BIIB | 22,000 | 2,000 | 7,009,000 | 747,000 | $318.59 |
| 09/30/2017 | BIOGEN INC. | BIIB | 20,000 | 12,500 | 6,262,000 | 4,227,000 | $313.10 |
| 06/30/2017 | BIOGEN INC. | BIIB | 7,500 | -2,500 | 2,035,000 | -699,000 | $271.33 |
| 03/31/2017 | BIOGEN INC. | BIIB | 10,000 | -25,000 | 2,734,000 | -7,191,000 | $273.40 |
| 12/31/2016 | BIOGEN INC. | BIIB | 35,000 | -10,000 | 9,925,000 | -4,161,000 | $283.57 |
| 09/30/2016 | BIOGEN INC. | BIIB | 45,000 | 22,500 | 14,086,000 | 8,645,000 | $313.02 |
| 06/30/2016 | BIOGEN INC. | BIIB | 22,500 | -6,570 | 5,441,000 | -2,127,000 | $241.82 |
| 03/31/2016 | BIOGEN INC. | BIIB | 29,070 | 29,070 | 7,568,000 | 7,568,000 | $260.34 |
| 12/31/2015 | BIOGEN INC. | BIIB | 20,000 | 20,000 | 6,127,000 | 6,127,000 | $306.35 |
| 09/30/2015 | BIOGEN INC. | BIIB | 30,000 | 30,000 | 8,754,000 | 8,754,000 | $291.80 |
| 06/30/2015 | BIOGEN INC. | BIIB | 15,000 | 15,000 | 6,059,000 | 6,059,000 | $403.93 |
| 03/31/2015 | BIOGEN INC. | BIIB | 0 | -40,000 | 0 | -13,578,000 | |
| 12/31/2014 | BIOGEN INC. | BIIB | 40,000 | 40,000 | 13,578,000 | 13,578,000 | $339.45 |
| 09/30/2014 | BIOGEN INC. | BIIB | 42,500 | 42,500 | 14,059,000 | 14,059,000 | $330.80 |
| 06/30/2014 | BIOGEN INC. | BIIB | 38,000 | 8,000 | 11,982,000 | 3,595,000 | $315.32 |
| 03/31/2014 | BIOGEN INC. | BIIB | 44,000 | 14,000 | 13,458,000 | 5,071,000 | $305.86 |
| 12/31/2013 | BIOGEN INC. | BIIB | 30,000 | 30,000 | 8,387,000 | 8,387,000 | $279.57 |
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