Alyeska Investment Group
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Alyeska Investment Group’s West Pharmaceutical WST Stock Holding History

Alyeska Investment Group’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 		$11.1M Buy
+31,000
New +$9.48M 0.03% 417
2023
Q4 		– Sell
-154,440
Closed -$57.9M – 672
2023
Q3 		$57.9M Buy
+154,440
New +$59.7M 0.39% 85
2023
Q2 		– Sell
-227,349
Closed -$78.8M – 638
2023
Q1 		$78.8M Buy
+227,349
New +$66.4M 0.69% 41
2022
Q4 		– Sell
-201,854
Closed -$49.7M – 525
2022
Q3 		$49.7M Buy
201,854
+45,302
+29% +$13.8M 0.58% 54
2022
Q2 		$47.3M Buy
+156,552
New +$50.9M 0.54% 48
2020
Q2 		– Sell
-4,988
Closed -$759K – 582
2020
Q1 		$759K Buy
+4,988
New +$768K 0.02% 317
2018
Q2 		– Sell
-219,058
Closed -$19.3M – 535
2018
Q1 		$19.3M Buy
+219,058
New +$20.5M 0.16% 161

Other funds holding WST

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return
GIM
Generation Investment Management London, United Kingdom $10.3B AUM 4.84% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Alyeska Investment Group's WST Position: Q2 2026 in Review

Alyeska Investment Group opened a new position in West Pharmaceutical (WST) in Q2 2026: 31,000 shares worth $11.1M. The stake represents 0.03% of the portfolio and ranks #417 among its holdings. This is a return to the name: Alyeska Investment Group previously reported a position in WST as recently as Q3 2023.

Alyeska Investment Group first reported a position in WST in Q1 2018 and has held it in 7 quarters since. The position peaked at $78.8M in Q1 2023. 833 funds tracked by Wall St. Rank hold WST as of Q2 2026.

  • Alyeska Investment Group held 31,000 shares of West Pharmaceutical worth $11.1M as of Q2 2026.
  • West Pharmaceutical was a new Alyeska Investment Group position in Q2 2026.
  • West Pharmaceutical made up 0.03% of Alyeska Investment Group's portfolio in Q2 2026, its #417 holding.
  • Alyeska Investment Group first reported a position in West Pharmaceutical in Q1 2018 and has held it in 7 quarters since.
  • Alyeska Investment Group's West Pharmaceutical position peaked at $78.8M in Q1 2023.
  • 833 funds tracked by Wall St. Rank held West Pharmaceutical as of Q2 2026.

Based on Alyeska Investment Group's 13F filing for Q2 2026, filed 14 Aug 2026.