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Rock Springs Capital Management LP
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| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | BOSTON SCIENTIFIC CORP | BSX | 267,500 | 267,500 | 14,469,075,000 | 14,469,075,000 | $54,090.00 |
| 09/30/2021 | BOSTON SCIENTIFIC CORP | BSX | 0 | -800,000 | 0 | -34,208,000 | |
| 06/30/2021 | BOSTON SCIENTIFIC CORP | BSX | 800,000 | 0 | 34,208,000 | 3,288,000 | $42.76 |
| 03/31/2021 | BOSTON SCIENTIFIC CORP | BSX | 800,000 | 0 | 30,920,000 | 2,160,000 | $38.65 |
| 12/31/2020 | BOSTON SCIENTIFIC CORP | BSX | 800,000 | -300,000 | 28,760,000 | -13,271,000 | $35.95 |
| 09/30/2020 | BOSTON SCIENTIFIC CORP | BSX | 1,100,000 | 0 | 42,031,000 | 3,410,000 | $38.21 |
| 06/30/2020 | BOSTON SCIENTIFIC CORP | BSX | 1,100,000 | 0 | 38,621,000 | 2,728,000 | $35.11 |
| 03/31/2020 | BOSTON SCIENTIFIC CORP | BSX | 1,100,000 | -100,000 | 35,893,000 | -18,371,000 | $32.63 |
| 12/31/2019 | BOSTON SCIENTIFIC CORP | BSX | 1,200,000 | 230,000 | 54,264,000 | 14,795,000 | $45.22 |
| 09/30/2019 | BOSTON SCIENTIFIC CORP | BSX | 970,000 | 0 | 39,469,000 | -2,222,000 | $40.69 |
| 06/30/2019 | BOSTON SCIENTIFIC CORP | BSX | 970,000 | 0 | 41,691,000 | 4,462,000 | $42.98 |
| 03/31/2019 | BOSTON SCIENTIFIC CORP | BSX | 970,000 | 55,000 | 37,229,000 | 4,893,000 | $38.38 |
| 12/31/2018 | BOSTON SCIENTIFIC CORP | BSX | 915,000 | 115,000 | 32,336,000 | 1,536,000 | $35.34 |
| 09/30/2018 | BOSTON SCIENTIFIC CORP | BSX | 800,000 | 627,500 | 30,800,000 | 25,159,000 | $38.50 |
| 06/30/2018 | BOSTON SCIENTIFIC CORP | BSX | 172,500 | 172,500 | 5,641,000 | 5,641,000 | $32.70 |
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