WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Position in WST — West Pharmaceutical Services Inc
CIK 1644956
CHICAGO, IL
Position in WST
as of Mar 31, 2026
· filed May 8, 2026
Position Value
$9,956,674
-$1,390,649 QoQ
Shares Held
39,725
-3.7% QoQ
Ownership
0.056%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2023
10 quarters on record
Voting authority
Sole 88%
Shared 0%
None 12%
Common Shares in WST Over Time
Shares Held
Position Value (USD)
Position in Medical Instruments & Supplies
Healthcare · as of Mar 31, 2026WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $98,671,817 across 4 Medical Instruments & Supplies names. WST ranks #3 (10.1% of the industry book) .
All Filings in WST
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10 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $9,956,674 | 39,725 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $11,347,323 | 41,242 | Shares | Sole | 2026-02-09 | |
| 2025-09-30 | $10,704,375 | 40,805 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $80,114,057 | 366,152 | Shares | Sole | 2025-07-29 | |
| 2025-03-31 | $78,993,371 | 352,838 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $209,879,156 | 640,735 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $23,121,324 | 77,030 | Shares | Sole | 2024-11-08 | |
| 2024-06-30 | $21,899,494 | 66,485 | Shares | Sole | 2024-08-08 | |
| 2024-03-31 | $24,135,540 | 60,993 | Shares | Sole | 2024-05-08 | |
| 2023-03-31 | $552,619 | 1,595 | Shares | Sole | 2023-05-12 | |
| No filing history on record for this holder in this stock. | ||||||