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Alyeska Investment Group, L.P.
> BIIB
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | BIOGEN INC. | BIIB | 367,268 | 367,268 | 104,616,290,000 | 104,616,290,000 | $284,850.00 |
| 03/31/2023 | BIOGEN INC. | BIIB | 0 | -25,064 | 0 | -6,940,723,000 | |
| 12/31/2022 | BIOGEN INC. | BIIB | 25,064 | 25,064 | 6,940,723,000 | 6,940,723,000 | $276,920.00 |
| 09/30/2021 | BIOGEN INC. | BIIB | 0 | -65,367 | 0 | -22,635,000 | |
| 06/30/2021 | BIOGEN INC. | BIIB | 65,367 | 65,367 | 22,635,000 | 22,635,000 | $346.28 |
| 09/30/2017 | BIOGEN INC. | BIIB | 0 | -149,507 | 0 | -40,570,000 | |
| 06/30/2017 | BIOGEN INC. | BIIB | 149,507 | 149,507 | 40,570,000 | 40,570,000 | $271.36 |
| 12/31/2016 | BIOGEN INC. | BIIB | 0 | -149,217 | 0 | -46,709,000 | |
| 09/30/2016 | BIOGEN INC. | BIIB | 149,217 | 149,217 | 46,709,000 | 46,709,000 | $313.03 |
| 06/30/2016 | BIOGEN INC. | BIIB | 0 | -23,381 | 0 | -6,087,000 | |
| 03/31/2016 | BIOGEN INC. | BIIB | 0 | -5,835 | 0 | -1,788,000 | |
| 12/31/2015 | BIOGEN INC. | BIIB | 5,835 | 5,835 | 1,788,000 | 1,788,000 | $306.43 |
| 09/30/2015 | BIOGEN INC. | BIIB | 0 | -7,500 | 0 | -3,030,000 | |
| 06/30/2015 | BIOGEN INC. | BIIB | 7,500 | 7,500 | 3,030,000 | 3,030,000 | $404.00 |
| 09/30/2013 | BIOGEN INC. | BIIB | 0 | -35,000 | 0 | -7,532,000 | |
| 06/30/2013 | BIOGEN INC. | BIIB | 35,000 | 35,000 | 7,532,000 | 7,532,000 | $215.20 |
| 09/30/2012 | BIOGEN INC. | BIIB | 0 | -150,000 | 0 | -21,657,000 | |
| 06/30/2012 | BIOGEN INC. | BIIB | 150,000 | 150,000 | 21,657,000 | 21,657,000 | $144.38 |
| 03/31/2012 | BIOGEN INC. | BIIB | 0 | -225,347 | 0 | -20,991,000 | |
| 12/31/2011 | BIOGEN INC. | BIIB | 0 | -225,347 | 0 | -20,991,000 | |
| 09/30/2011 | BIOGEN INC. | BIIB | 225,347 | -74,649 | 20,991,000 | -11,085,000 | $93.15 |
| 06/30/2011 | BIOGEN INC. | BIIB | 299,996 | 299,996 | 32,076,000 | 32,076,000 | $106.92 |
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