Summary
Updated Aug 31, 2026
Robert C. Lyons files SEC Form 4 reports at PACKAGING CORP OF AMERICA (PKG). 4 SEC Form 4 filings on record going back to 2025, most recently on 12 May 2026. Most recent open-market trade: sold $17K of GATX on 3 September 2025. Lifetime open-market sales: $2.10M.
Recent Transactions
7Every recent SEC Form 4 transaction Robert C. Lyons has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Robert C. Lyons go back to 2025: 4 primary Form 4 filings, an average of 2.0 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 C. Lyons 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.
- Thomas A. Hassfurther - $9.98M of PKG open-market activity in the last 12 months
- Mark W. Kowlzan - $7.41M of PKG open-market activity in the last 12 months
- Thomas A. Ellman - $3.28M of GATX open-market activity in the last 12 months
- Donald R. Shirley - $3.01M of PKG open-market activity in the last 12 months
- Robert Zmudka - $1.00M of GATX open-market activity in the last 12 months
- Jeffery R. Young - $509K of GATX 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 C. Lyons?
Robert C. Lyons is a corporate insider of PACKAGING CORP OF AMERICA (PKG). InsiderAlpha holds 4 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Robert C. Lyons last file a Form 4?
The most recent primary Form 4 on record is dated 12 May 2026, one of 4 filings going back to 2025.
Has Robert C. Lyons been buying or selling stock?
Recorded transactions: 0 open-market purchases and 4 open-market sales ($2.10M) across all tracked filings.
Where can I see all of Robert C. Lyons'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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