West Pharmaceutical Services, Inc. (WST) ownership: Top institutional holder: VANGUARD GROUP INC ($2.62B). Insider activity: Net Seller (2 buys, 18 sells). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 9539173.00 | $2.62B | 2025-12-31 |
| BlackRock, Inc. | 6836714.00 | $1.71B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4683286.00 | $1.17B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 4094009.00 | $1.03B | 2026-03-31 |
| STATE STREET CORP | 3293778.00 | $825.55M | 2026-03-31 |
| Artisan Partners Limited Partnership | 2657893.00 | $666.17M | 2026-03-31 |
| Bank of New York Mellon Corp | 2465858.00 | $618.04M | 2026-03-31 |
| T. Rowe Price Investment Management, Inc. | 2340403.00 | $586.60M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-12 | |
| Buy | null | 2026-05-12 | |
| Buy | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-04 | |
| Sell | null | 2026-05-04 |
Back to WST overview · WST earnings · All congressional trades
Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.