Key facts
- This page summarizes Robert W. McMahon's Form 4 filing for WEST PHARMACEUTICAL SERVICES INC (WST).
- 6 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 12 Aug 2026, 14:56.
Robert W. McMahon - 11 Aug 2026 Form 4 Insider Report for WEST PHARMACEUTICAL SERVICES INC (WST)
- Reporting relationship
- SVP & Chief Financial Officer
- Issuer ticker
- WST
- Reported as of
- 11 Aug 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 12 Aug 2026, 14:56:50 UTC
- Prior SEC filing
- 05 Jun 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Caitlin Hippeli, as an agent for Robert W. McMahon
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Robert W. McMahon filed Form 4 for WEST PHARMACEUTICAL SERVICES INC (WST) on 12 Aug 2026.
Change
- Previous filing in this sequence was filed on 05 Jun 2026.
- Current net transaction value: $0.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
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/ Caitlin Hippeli, as an agent for Robert W. McMahon
- Signature date
- 12 Aug 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
- +794
- Change %
- +27%
- Price
- Shares after
- 3,775
- Date
- 11 Aug 2026
- Ownership
- Direct
- Footnotes
- F1
WST
transaction
Common Stock
Tax liability
- Transaction value
- Shares
- -346
- Change %
- -9.2%
- Price
- $351.37*
- Shares after
- 3,429
- Date
- 11 Aug 2026
- Ownership
- Direct
WST
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +6,355
- Change %
- +185%
- Price
- Shares after
- 9,784
- Date
- 11 Aug 2026
- Ownership
- Direct
- Footnotes
- F1
WST
transaction
Common Stock
Tax liability
- Transaction value
- Shares
- -2,764
- Change %
- -28%
- Price
- $351.37*
- Shares after
- 7,021
- Date
- 11 Aug 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
- Shares
- -6,355
- Change %
- -75%
- Price
- $0.000000*
- Shares after
- 2,119
- Date
- 11 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 6,355
- Exercise price
- Footnotes
- F1, F2
WST
transaction
Derivative
Rst. Stock Unit
Options Exercise
- Transaction value
- Shares
- -794
- Change %
- -25%
- Price
- $0.000000*
- Shares after
- 2,383
- Date
- 11 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 794
- Exercise price
- Footnotes
- F1, F3
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 3 footnotes
Footnote F1
Each restricted stock unit represents a contingent right to receive one share of WST common stock.
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.
Footnote F3
This award vests in four equal annual installments beginning on August 11, 2026.