Robert W. McMahon - 11 Feb 2026 Form 4 Insider Report for WEST PHARMACEUTICAL SERVICES INC (WST)

Reporting relationship: SVP & Chief Financial Officer
Issuer ticker: WST
Reported as of: 11 Feb 2026
Net transaction value: -$307,708
SEC form: 4
Accepted by SEC: 12 Feb 2026, 21:37:44 UTC
Prior SEC filing: 12 Aug 2025
Next SEC filing: 03 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ Louis Lalli, as an agent for Robert W. McMahon

Key filing fact

Robert W. McMahon filed Form 4 for WEST PHARMACEUTICAL SERVICES INC (WST) on 12 Feb 2026.

Key facts

This page summarizes Robert W. McMahon's Form 4 filing for WEST PHARMACEUTICAL SERVICES INC (WST).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 12 Feb 2026, 21:37.

Change

Previous filing in this sequence was filed on 12 Aug 2025.
Current net transaction value: -$307,708.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001608730 Primary reporting owner

McMahon Robert W.

Relationship: SVP & Chief Financial Officer
Address: 530 HERMAN O. WEST DRIVE, EXTON
Signature: /s/ Louis Lalli, as an agent for Robert W. McMahon
Signature date: 12 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

WST transaction

Common Stock

Options Exercise

Transaction value
Shares: +4,231
Change %
Price
Shares after: 4,231
Date: 11 Feb 2026
Ownership: Direct
Footnotes: F1

WST transaction

Common Stock

Tax liability

Transaction value: $307,708
Shares: -1,250
Change %: -30%
Price: $246.16
Shares after: 2,980
Date: 11 Feb 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

WST transaction Derivative

Rst. Stock Unit

Options Exercise

Transaction value: $0
Shares: -4,231
Change %: -33%
Price: $0.000000
Shares after: 8,462
Date: 11 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 4,231
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

Restricted stock units convert into common stock on a one-for-one basis.

Footnote F2

On August 11, 2025, the reporting person was granted 12,670 restricted stock units, vesting in three installments - 4,223 shares (plus dividend equivalents) to vest six months from the grant date, 6,335 shares (plus dividend equivalents) to vest 12 months from the grant date and 2,112 shares (plus dividend equivalents) to vest 24 months from the grant date.