Balyasny Asset Management L.P.
Position in WST — West Pharmaceutical Services Inc
CIK 1218710
Chicago, IL
Position in WST
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$16,429,994
+$16,149,027 QoQ
Shares Held
45,766
+3982.6% QoQ
Ownership
0.065%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
#132
of 827 holders
Holding Since
Jun 2020
15 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in WST Over Time
Shares Held
Position Value (USD)
Derivatives in WST
reported options exposure · as of Jun 30, 2021CallValue
$0
CallShares
0
PutValue
$4,668,300
PutShares
13,000
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 Instruments & Supplies
Healthcare · as of Jun 30, 2026Balyasny Asset Management L.P. holds $305,827,379 across 20 Medical Instruments & Supplies names. WST ranks #8 (5.4% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | COO |
Cooper Companies, Inc.
|
990,419 | $71,022,946 | |
| 2 | RGEN |
Repligen Corp
|
355,507 | $48,505,375 | |
| 3 | BDX |
Becton Dickinson & Co
|
317,107 | $47,987,802 | |
| 4 | TFX |
Teleflex Inc
|
315,212 | $39,956,273 | |
| 5 | PLSE |
Pulse Biosciences, Inc.
|
718,103 | $19,912,995 | |
| 6 | ATR |
Aptargroup, Inc.
|
154,806 | $19,381,711 | |
| 7 | SOLV |
Solventum Corp
|
247,812 | $19,118,695 | |
| 8 | WST |
West Pharmaceutical Services Inc
This page
|
45,766 | $16,429,994 |
All Filings in WST
Export CSV
15 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $16,429,994 | 45,766 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $280,967 | 1,121 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $323,289 | 1,175 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $11,981,398 | 45,673 | Shares | Sole | 2025-11-14 | |
| 2024-12-31 | $11,668,997 | 35,624 | Shares | Sole | 2025-02-14 | |
| 2024-06-30 | $1,366,309 | 4,148 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $2,841,989 | 7,182 | Shares | Sole | 2024-05-13 | |
| 2023-12-31 | $75,186,423 | 213,525 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $77,669,970 | 207,004 | Shares | Sole | 2023-11-14 | |
| 2022-12-31 | $4,957,647 | 21,065 | Shares | Other | 2023-02-14 | |
| 2021-09-30 | $6,431,781 | 15,150 | Shares | Sole | 2021-12-01 | |
| 2021-06-30 | $4,668,300 | 13,000 | Put | Sole | 2021-08-16 | |
| 2020-12-31 | $8,115,698 | 28,646 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $13,429,964 | 48,854 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $2,350,755 | 10,348 | Shares | Sole | 2020-08-14 | |
| No filing history on record for this holder in this stock. | ||||||