West Pharmaceutical Services (WST)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-02-17 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: WEST PHARMACEUTICAL SERVICES INC (WST) CIK: 0000105770 --- Reporting Owner --- Name: Favorite Annette F CIK: 0001654975 Role: Officer (Sr. VP & Chief HR Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-02-17 | Code: A (Grant or award) Shares: +441.957 | Price: $0.00 Shares Owned After: 17,425.1994 | Ownership: D (Direct) Footnotes: [F1] These shares result from performance stock units (PSUs) which vested at the end of the respective 2023-2025 PSU performance period and were payable on the transaction date shown. [Transaction #2] Security: Common Stock Date: 2026-02-17 | Code: F (Payment of exercise/tax) Shares: -150.443 | Price: $243.19 Total Value: $36,586.23 Shares Owned After: 17,274.7564 | Ownership: D (Direct) [Transaction #3] Security: Common Stock Date: 2026-02-18 | Code: M (Exercise of derivative) Shares: +135.491 Shares Owned After: 17,410.2474 | Ownership: D (Direct) Footnotes: [F2] Restricted stock units convert into common stock on a one-for-one basis. [Transaction #4] Security: Common Stock Date: 2026-02-18 | Code: F (Payment of exercise/tax) Shares: -35.757 | Price: $248.26 Total Value: $8,877.03 Shares Owned After: 17,374.4904 | Ownership: D (Direct) --- Derivative Transactions --- [Transaction #1] Security: Rst. Stock Unit Date: 2026-02-18 | Code: M (Exercise of derivative) Shares: -135.491 | Price: $0.00 Shares Owned After: 408.486 | Ownership: D (Direct) Footnotes: [F2] Restricted stock units convert into common stock on a one-for-one basis. [F3] On February 18, 2025, the reporting person was granted 542 restricted stock units, vesting in four equal annual installments (plus dividend equivalents). [F3] On February 18, 2025, the reporting person was granted 542 restricted stock units, vesting in four equal annual installments (plus dividend equivalents). --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: These shares result from performance stock units (PSUs) which vested at the end of the respective 2023-2025 PSU performance period and were payable on the transaction date shown. F2: Restricted stock units convert into common stock on a one-for-one basis. F3: On February 18, 2025, the reporting person was granted 542 restricted stock units, vesting in four equal annual installments (plus dividend equivalents). --- Signature --- /s/ /s/ Louis Lalli, as an agent for Annette Favorite (2026-02-19)