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BOSTON ADVISORS LLC
> ALXN
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 09/30/2019 | ALEXION PHARMACEUTICALS, INC. | ALXN | 0 | -33,142 | 0 | -4,341,000 | |
| 06/30/2019 | ALEXION PHARMACEUTICALS, INC. | ALXN | 33,142 | -14,591 | 4,341,000 | -2,111,000 | $130.98 |
| 03/31/2019 | ALEXION PHARMACEUTICALS, INC. | ALXN | 47,733 | 209 | 6,452,000 | 1,825,000 | $135.17 |
| 12/31/2018 | ALEXION PHARMACEUTICALS, INC. | ALXN | 47,524 | -2,236 | 4,627,000 | -2,290,000 | $97.36 |
| 09/30/2018 | ALEXION PHARMACEUTICALS, INC. | ALXN | 49,760 | -201,089 | 6,917,000 | -24,226,000 | $139.01 |
| 06/30/2018 | ALEXION PHARMACEUTICALS, INC. | ALXN | 250,849 | 81,478 | 31,143,000 | 12,265,000 | $124.15 |
| 03/31/2018 | ALEXION PHARMACEUTICALS, INC. | ALXN | 169,371 | 20,130 | 18,878,000 | 1,030,000 | $111.46 |
| 12/31/2017 | ALEXION PHARMACEUTICALS, INC. | ALXN | 149,241 | 4,315 | 17,848,000 | -2,484,000 | $119.59 |
| 09/30/2017 | ALEXION PHARMACEUTICALS, INC. | ALXN | 144,926 | -9,815 | 20,332,000 | 1,505,000 | $140.29 |
| 06/30/2017 | ALEXION PHARMACEUTICALS, INC. | ALXN | 154,741 | 345 | 18,827,000 | 108,000 | $121.67 |
| 03/31/2017 | ALEXION PHARMACEUTICALS, INC. | ALXN | 154,396 | 34,315 | 18,719,000 | 4,027,000 | $121.24 |
| 12/31/2016 | ALEXION PHARMACEUTICALS, INC. | ALXN | 120,081 | 120,081 | 14,692,000 | 14,692,000 | $122.35 |
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