Summary
Updated Aug 31, 2026
Robbert Rietbroek is President and CEO of GRAPHIC PACKAGING HOLDING CO (GPK). 6 SEC Form 4 filings on record going back to 2024, most recently on 4 March 2026. Most recent open-market trade: bought $501K of GPK on 4 March 2026. Lifetime open-market purchases: $701K.
Recent Transactions
4Every recent SEC Form 4 transaction Robbert Rietbroek has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Robbert Rietbroek 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.
- Tony W. Lee - $497.40M of PRMB open-market activity in the last 12 months
- ORCP III DE TopCo GP, LLC - $497.40M of PRMB open-market activity in the last 12 months
- Eric J. Foss - $3.99M of PRMB open-market activity in the last 12 months
- Steven P. Stanbrook - $896K of PRMB open-market activity in the last 12 months
- David W. Hass - $250K of PRMB open-market activity in the last 12 months
- Jeffrey Stafeil - $200K of GPK 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 Robbert Rietbroek?
Robbert Rietbroek is a corporate insider, tracked as President and CEO of GRAPHIC PACKAGING HOLDING CO (GPK). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Robbert Rietbroek last file a Form 4?
The most recent primary Form 4 on record is dated 4 March 2026, one of 6 filings going back to 2024.
Has Robbert Rietbroek been buying or selling stock?
Recorded transactions: 2 open-market purchases ($701K) and 0 open-market sales across all tracked filings.
Where can I see all of Robbert Rietbroek'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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