Parnassus Investments
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Parnassus Investments’s West Pharmaceutical WST Stock Holding History

Parnassus Investments’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
Q1 		– Sell
-34,387
Closed -$9.46M – 149
2025
Q4 		$9.46M Buy
34,387
+819
+2% +$224K 0.02% 123
2025
Q3 		$8.81M Sell
33,568
-35,680
-52% -$8.67M 0.02% 127
2025
Q2 		$15.2M Buy
69,248
+6,769
+11% +$1.45M 0.03% 117
2025
Q1 		$14M Hold
62,479
– – 0.03% 120
2024
Q4 		$20.5M Buy
62,479
+4,090
+7% +$1.29M 0.05% 106
2024
Q3 		$17.5M Buy
58,389
+20,376
+54% +$6.24M 0.04% 109
2024
Q2 		$12.5M Buy
+38,013
New +$13.4M 0.03% 114

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
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 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
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 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
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Parnassus Investments's WST Position: Q1 2026 in Review

Parnassus Investments sold out of West Pharmaceutical (WST) in Q1 2026, closing a stake of 34,387 shares — an estimated $9.46M sold.

Parnassus Investments first reported a position in WST in Q2 2024 and held it in 7 quarters. The position peaked at $20.5M in Q4 2024. 755 funds tracked by Wall St. Rank hold WST as of Q1 2026.

  • Parnassus Investments reported no remaining West Pharmaceutical position as of Q1 2026 after selling out during the quarter.
  • Parnassus Investments sold 34,387 West Pharmaceutical shares in Q1 2026, an estimated $9.46M.
  • Parnassus Investments first reported a position in West Pharmaceutical in Q2 2024 and held it in 7 quarters.
  • Parnassus Investments's West Pharmaceutical position peaked at $20.5M in Q4 2024.
  • 755 funds tracked by Wall St. Rank held West Pharmaceutical as of Q1 2026.

Based on Parnassus Investments's 13F filing for Q1 2026, filed 12 May 2026.