| Filed | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| 2026-05-11 | Stafeil Jeffrey Director | Bought | 17,878 | $11.19 | $200k |
| 2026-05-11 | HAGEMANN ROBERT Director | Bought | 14,000 | $11.00 | $154k |
| 2026-03-05 | Venturelli Larry M Director | Bought | 17,531 | $11.37 | $199k |
| 2026-03-04 | Rietbroek Robbert President and CEO | Bought | 44,278 | $11.32 | $501k |
| 2025-08-05 | MARTENS PHILIP R Director | Sold | 56,737 | $21.84 | $1.2M |
| Insider | Role | Buys | Total bought |
|---|---|---|---|
| Rietbroek Robbert | President and CEO | 1 | $501k |
| Stafeil Jeffrey | Director | 1 | $200k |
| Venturelli Larry M | Director | 1 | $199k |
| HAGEMANN ROBERT | Director | 1 | $154k |
Every insider buy and sell for GPK plotted on the price, the full two-year history, cluster scores and daily updates — in the members area, $29/month. A free quarterly sample of the whole dataset needs no account.
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