SIM
WST icon

Seilern Investment Management’s West Pharmaceutical WST Stock Holding History

Seilern Investment Management’s Portfolio WST Stock Details WST Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$49.6M Sell
138,230
-87,791
-39% -$26.8M 6.25% 7
2026
Q1 		$56.6M Sell
226,021
-52,208
-19% -$13M 6.76% 4
2025
Q4 		$76.6M Sell
278,229
-48,728
-15% -$13.3M 5.94% 7
2025
Q3 		$85.8M Sell
326,957
-104,604
-24% -$25.4M 6.2% 7
2025
Q2 		$94.4M Sell
431,561
-9,796
-2% -$2.09M 6.23% 8
2025
Q1 		$98.8M Sell
441,357
-2,468
-0.6% -$680K 6.46% 6
2024
Q4 		$145M Buy
+443,825
New +$140M 8.28% 4

Other funds holding WST

RP
Riverbridge Partners Minneapolis, Minnesota $3.58B AUM 4.02% 1-Year Est. Return
Ninety One (UK)
Ninety One (UK) London, United Kingdom $44.7B AUM 17.24% 1-Year Est. Return
Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return
Handelsbanken Fonder
Handelsbanken Fonder Stockholm, Sweden $35.1B AUM 47.76% 1-Year Est. Return
GWI
Grace & White Inc Ny, New York $632M AUM 34.34% 1-Year Est. Return
MCG
McCollum Christoferson Group Amherst, New York $341M AUM 15.01% 1-Year Est. Return
YCM
Yousif Capital Management Bloomfield Hills, Michigan $8.94B AUM 42.6% 1-Year Est. Return
BZWA
Blue Zone Wealth Advisors Los Angeles, California $573M AUM 22.86% 1-Year Est. Return
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
CNB
Czech National Bank Prague, Czech Republic $18.3B AUM 43.04% 1-Year Est. Return

Seilern Investment Management's WST Position: Q2 2026 in Review

Seilern Investment Management reduced its West Pharmaceutical (WST) stake by 39% in Q2 2026, selling an estimated $26.8M and leaving 138,230 shares worth $49.6M. The position accounts for 6.25% of the portfolio, ranked #7.

Seilern Investment Management first reported a position in WST in Q4 2024 and has held it in 7 quarters since. The position peaked at $145M in Q4 2024. 120 funds tracked by Wall St. Rank hold WST as of Q2 2026.

  • Seilern Investment Management held 138,230 shares of West Pharmaceutical worth $49.6M as of Q2 2026.
  • Seilern Investment Management sold 87,791 West Pharmaceutical shares in Q2 2026, an estimated $26.8M.
  • West Pharmaceutical made up 6.25% of Seilern Investment Management's portfolio in Q2 2026, its #7 holding.
  • Seilern Investment Management first reported a position in West Pharmaceutical in Q4 2024 and has held it in 7 quarters since.
  • Seilern Investment Management's West Pharmaceutical position peaked at $145M in Q4 2024.
  • 120 funds tracked by Wall St. Rank held West Pharmaceutical as of Q2 2026.

Based on Seilern Investment Management's 13F filing for Q2 2026, filed 8 Jul 2026.