Summary
Updated Aug 31, 2026
John A. Mastalerz Jr. is SVP Fin, Corp Controller, CAO of WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP (WAB). 5 SEC Form 4 filings on record going back to 2024, most recently on 9 March 2026. Most recent open-market trade: sold $581K of WAB on 14 November 2025. Lifetime open-market sales: $1.14M.
Recent Transactions
6Every recent SEC Form 4 transaction John A. Mastalerz Jr. has reported, most recent first.
Trading Pattern
InsiderAlpha's records for John A. Mastalerz Jr. go back to 2024: 5 primary Form 4 filings, an average of 1.7 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 John A. Mastalerz Jr. 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.
- Rafael Santana - $22.47M of WAB open-market activity in the last 12 months
- David L. Deninno - $4.11M of WAB open-market activity in the last 12 months
- John A. Olin - $2.90M of WAB open-market activity in the last 12 months
- Rogerio Mendonca - $2.22M of WAB open-market activity in the last 12 months
- Eric Gebhardt - $2.12M of WAB open-market activity in the last 12 months
- Nalin Jain - $2.10M of WAB 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 John A. Mastalerz Jr.?
John A. Mastalerz Jr. is a corporate insider, tracked as SVP Fin, Corp Controller, CAO of WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP (WAB). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did John A. Mastalerz Jr. last file a Form 4?
The most recent primary Form 4 on record is dated 9 March 2026, one of 5 filings going back to 2024.
Has John A. Mastalerz Jr. been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($1.14M) across all tracked filings.
Where can I see all of John A. Mastalerz Jr.'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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