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Rietbroek Robbert – Insider Transactions
Ticker
Owner
Relationship
Date
Transaction
Cost
#Shares
Value ($)
#Shares Total
SEC Form 4
GPK
Rietbroek Robbert
President and CEO
Mar 04 '26
Buy
11.32
44,278
501,099
44,278
Mar 04
PRMB
Rietbroek Robbert
Chief Executive Officer
Aug 13 '25
Buy
24.12
8,285
199,834
586,349
Aug 14