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Equibles

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Position in WST — West Pharmaceutical Services Inc

CIK 1644956 CHICAGO, IL
Back to WST Full portfolio

Position in WST

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$149,813,931
+$139,857,257 QoQ
Shares Held
417,309
+950.5% QoQ
Ownership
0.593%
of shares outstanding
% of Portfolio
0.45%
of 13F equity value
Holder Rank
#39
of 831 holders
Holding Since
Mar 2023
11 quarters on record
Voting authority Sole 89% Shared 0% None 11%

Common Shares in WST Over Time

Shares Held

Position Value (USD)

Position in Medical Instruments & Supplies

Healthcare · as of Jun 30, 2026

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $364,975,026 across 5 Medical Instruments & Supplies names. WST ranks #1 (41.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 WST
West Pharmaceutical Services Inc
This page 		417,309 $149,813,931
2 RGEN
Repligen Corp
 788,571 $107,592,627
3 MMSI
Merit Medical Systems Inc
 1,137,790 $78,894,358
4 ICUI
Icu Medical Inc/De
 172,181 $25,241,734
5 ISRG
Intuitive Surgical Inc
 8,631 $3,432,376

All Filings in WST

Export CSV
11 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $149,813,931 417,309
2026-03-31 $9,956,674 39,725
2025-12-31 $11,347,323 41,242
2025-09-30 $10,704,375 40,805
2025-06-30 $80,114,057 366,152
2025-03-31 $78,993,371 352,838
2024-12-31 $209,879,156 640,735
2024-09-30 $23,121,324 77,030
2024-06-30 $21,899,494 66,485
2024-03-31 $24,135,540 60,993
2023-03-31 $552,619 1,595