Summary
Updated Aug 30, 2026
Robert W. McMahon is SVP & Chief Financial Officer of WEST PHARMACEUTICAL SERVICES INC (WST). 13 SEC Form 4 filings on record going back to 2024, most recently on 12 August 2026.
Recent Transactions
17Every recent SEC Form 4 transaction Robert W. McMahon has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Robert W. McMahon go back to 2024: 13 primary Form 4 filings, an average of 4.3 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Robert W. McMahon files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Annette F. Favorite - $860K of WST open-market activity in the last 12 months
- Chad Winters - $269K of WST open-market activity in the last 12 months
- Steven Kyle Boyd - $225K of OSUR open-market activity in the last 12 months
- Kenneth J. McGrath - $161K of OSUR open-market activity in the last 12 months
- Manner Carrie Eglinton - $161K of OSUR open-market activity in the last 12 months
- Nancy J. Gagliano - $5K of OSUR open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Robert W. McMahon?
Robert W. McMahon is a corporate insider, tracked as SVP & Chief Financial Officer of WEST PHARMACEUTICAL SERVICES INC (WST). InsiderAlpha holds 13 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Robert W. McMahon submitted recently?
2 primary Form 4 filings in the last 90 days, covering 2 companies.
Where can I see all of Robert W. McMahon's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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