Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Philip R. Martens 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.
- Robbert Rietbroek - $501K in GPK purchases and sales in the last 12 months
- Jeffrey Stafeil - $200K in GPK purchases and sales in the last 12 months
- Larry M. Venturelli - $199K in GPK purchases and sales in the last 12 months
- Robert Hagemann - $154K in GPK purchases and sales in the last 12 months
More insiders (A-Z)
Browse nearby insider profiles in alphabetical order.
Frequently asked questions
Who is Philip R. Martens?
Philip R. Martens is a corporate insider of GRAPHIC PACKAGING HOLDING CO (GPK). InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Philip R. Martens last file a Form 4?
The most recent primary Form 4 on record is dated 21 May 2026, one of 3 filings going back to 2025.
Has Philip R. Martens been buying or selling stock?
Recorded transactions: 0 open-market purchases and 2 open-market sales ($1.39M) across all tracked filings.
