Position in BSX
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$85,097,345
-$151,537,422 QoQ
Shares Held
1,356,133
-45.4% QoQ
Ownership
0.091%
of shares outstanding
% of Portfolio
0.18%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
22 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in BSX Over Time
Shares Held
Position Value (USD)
Derivatives in BSX
reported options exposure · as of Mar 31, 2026CallValue
$1,474,625
CallShares
23,500
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Medical Devices
Healthcare · as of Mar 31, 2026Balyasny Asset Management L.P. holds $878,026,211 across 43 Medical Devices names. BSX ranks #4 (9.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | PEN |
Penumbra Inc
|
762,096 | $250,249,463 | |
| 2 | MASI |
Masimo Corp
|
770,986 | $137,135,279 | |
| 3 | ABT |
Abbott Laboratories
|
844,451 | $86,699,784 | |
| 4 | BSX |
Boston Scientific Corp
This page
|
1,356,133 | $85,097,345 | |
| 5 | BRKR |
Bruker Corp
|
1,159,040 | $41,864,524 | |
| 6 | ZBH |
Zimmer Biomet Holdings, Inc.
|
424,578 | $38,390,342 | |
| 7 | AXGN |
Axogen, Inc.
|
1,087,066 | $36,014,495 | |
| 8 | DXCM |
Dexcom Inc
|
566,312 | $35,564,393 |
All Filings in BSX
Export CSV
47 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $1,474,625 | 23,500 | Call | Sole | 2026-05-15 | |
| 2026-03-31 | $85,097,345 | 1,356,133 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $236,634,767 | 2,481,749 | Shares | Sole | 2026-02-17 | |
| 2025-12-31 | $8,028,470 | 84,200 | Put | Sole | 2026-02-17 | |
| 2025-12-31 | $5,291,925 | 55,500 | Call | Sole | 2026-02-17 | |
| 2025-09-30 | $151,707,354 | 1,553,901 | Shares | Sole | 2025-11-14 | |
| 2025-09-30 | $26,887,302 | 275,400 | Call | Sole | 2025-11-14 | |
| 2025-09-30 | $3,924,726 | 40,200 | Put | Sole | 2025-11-14 | |
| 2025-06-30 | $4,199,731 | 39,100 | Put | Sole | 2025-08-14 | |
| 2025-06-30 | $161,642,705 | 1,504,913 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $5,508,048 | 54,600 | Put | Sole | 2025-05-15 | |
| 2025-03-31 | $185,435,497 | 1,838,179 | Shares | Sole | 2025-05-15 | |
| 2025-03-31 | $453,960 | 4,500 | Call | Sole | 2025-05-15 | |
| 2024-12-31 | $2,331,252 | 26,100 | Call | Sole | 2025-02-14 | |
| 2024-12-31 | $8,449,672 | 94,600 | Put | Sole | 2025-02-14 | |
| 2024-12-31 | $157,793,426 | 1,766,608 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $2,019,580 | 24,100 | Call | Sole | 2024-11-14 | |
| 2024-09-30 | $289,579,615 | 3,455,604 | Shares | Sole | 2024-11-14 | |
| 2024-09-30 | $6,226,340 | 74,300 | Put | Sole | 2024-11-14 | |
| 2024-06-30 | $1,624,911 | 21,100 | Call | Sole | 2024-08-14 | |
| 2024-06-30 | $5,544,720 | 72,000 | Put | Sole | 2024-08-14 | |
| 2024-06-30 | $224,566,781 | 2,916,073 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $109,127,445 | 1,593,334 | Shares | Sole | 2024-05-13 | |
| 2024-03-31 | $7,807,860 | 114,000 | Put | Sole | 2024-05-13 | |
| 2024-03-31 | $2,883,429 | 42,100 | Call | Sole | 2024-05-13 | |
| 2023-12-31 | $77,035,062 | 1,332,556 | Shares | Sole | 2024-02-14 | |
| 2023-12-31 | $2,433,801 | 42,100 | Call | Sole | 2024-02-14 | |
| 2023-12-31 | $6,590,340 | 114,000 | Put | Sole | 2024-02-14 | |
| 2023-09-30 | $13,728,000 | 260,000 | Put | Sole | 2023-11-14 | |
| 2023-09-30 | $400,012 | 7,576 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $1,022,950 | 18,912 | Shares | Other | 2023-08-14 | |
| 2023-03-31 | $29,718,720 | 594,018 | Shares | Sole | 2023-05-15 | |
| 2022-09-30 | $90,912,284 | 2,347,335 | Shares | Sole | 2022-11-15 | |
| 2022-09-30 | $15,104,700 | 390,000 | Call | Sole | 2022-11-15 | |
| 2022-06-30 | $44,119,107 | 1,183,770 | Shares | Sole | 2022-08-15 | |
| 2022-06-30 | $98,020,100 | 2,630,000 | Call | Sole | 2022-08-15 | |
| 2022-03-31 | $21,094,574 | 476,283 | Shares | Sole | 2022-05-16 | |
| 2022-03-31 | $12,401,200 | 280,000 | Call | Sole | 2022-05-16 | |
| 2021-09-30 | $93,519,681 | 2,155,328 | Shares | Sole | 2021-12-01 | |
| 2021-06-30 | $812,440 | 19,000 | Put | Sole | 2021-08-16 | |
| 2021-06-30 | $74,059,293 | 1,731,976 | Shares | Sole | 2021-08-16 | |
| 2021-06-30 | $761,128 | 17,800 | Call | Sole | 2021-08-16 | |
| 2020-12-31 | $3,595,000 | 100,000 | Call | Sole | 2021-02-16 | |
| 2020-09-30 | $11,463,000 | 300,000 | Call | Sole | 2020-11-16 | |
| 2020-06-30 | $5,266,500 | 150,000 | Call | Sole | 2020-08-14 | |
| 2020-06-30 | $5,202,529 | 148,178 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $71,131,311 | 2,179,936 | Shares | Sole | 2020-05-15 | |
| No filing history on record for this holder in this stock. | ||||||