Aigen Investment Management’s West Pharmaceutical WST Stock Holding History

Aigen 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 Q1	$767K	Buy	+3,060	New	+$761K	0.2%	140
2025 Q3	–	Sell	-2,686	Closed	-$588K	–	1123
2025 Q2	$588K	Buy	+2,686	New	+$574K	0.08%	361
2024 Q3	–	Sell	-1,609	Closed	-$530K	–	1054
2024 Q2	$530K	Buy	+1,609	New	+$569K	0.1%	290
2023 Q1	–	Sell	-5,207	Closed	-$1.23M	–	850
2022 Q4	$1.23M	Buy	+5,207	New	+$1.23M	0.17%	151
2022 Q3	–	Sell	-1,004	Closed	-$304K	–	792
2022 Q2	$304K	Buy	+1,004	New	+$327K	0.05%	392
2021 Q2	–	Sell	-12,712	Closed	-$3.58M	–	763
2021 Q1	$3.58M	Sell	12,712 -7,154	-36%	-$2.05M	0.47%	53
2020 Q4	$5.63M	Buy	+19,866	New	+$5.57M	0.73%	12

Other funds holding WST

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Artisan Partners Milwaukee, Wisconsin $62.3B AUM 26.25% 1-Year Est. Return

Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

GIM

Generation Investment Management London, United Kingdom $11.2B AUM 0.58% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Aigen Investment Management's WST Position: Q1 2026 in Review

Aigen Investment Management opened a new position in West Pharmaceutical (WST) in Q1 2026: 3,060 shares worth $767K. The stake represents 0.2% of the portfolio and ranks #140 among its holdings. This is a return to the name: Aigen Investment Management previously reported a position in WST as recently as Q2 2025.

Aigen Investment Management first reported a position in WST in Q4 2020 and has held it in 7 quarters since. The position peaked at $5.63M in Q4 2020. 753 funds tracked by Wall St. Rank hold WST as of Q1 2026.

Aigen Investment Management held 3,060 shares of West Pharmaceutical worth $767K as of Q1 2026.
West Pharmaceutical was a new Aigen Investment Management position in Q1 2026.
West Pharmaceutical made up 0.2% of Aigen Investment Management's portfolio in Q1 2026, its #140 holding.
Aigen Investment Management first reported a position in West Pharmaceutical in Q4 2020 and has held it in 7 quarters since.
Aigen Investment Management's West Pharmaceutical position peaked at $5.63M in Q4 2020.
753 funds tracked by Wall St. Rank held West Pharmaceutical as of Q1 2026.

Based on Aigen Investment Management's 13F filing for Q1 2026, filed 15 May 2026.