🕵️ Graphic Packaging Holding Co ($GPK)
SEC insider & ownership activity, last 12 months · CIK 1408075 · every row links its SEC filing
Over the last 12 months insiders sold $2.1M against $1.1M of open-market buying. Philip R. Martens sold $1.4M in discretionary trades (Aug). Blackrock, Inc. added 8.8% → 11.0%. No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
4 buyers, $1.1M (8 lots) · 2 sellers, $2.1M (3 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Philip R. Martens | 0 | – | 2 | $1.4M | Aug 4, 2025 |
| Joseph P. Yost | 0 | – | 1 | $682K | Aug 25, 2025 |
| Rietbroek Robbert | 1 | $501K | 0 | – | Mar 4, 2026 |
| Stafeil Jeffrey | 2 | $200K | 0 | – | May 20, 2026 |
| Larry M. Venturelli | 4 | $199K | 0 | – | Mar 4, 2026 |
| Hagemann Robert | 1 | $154K | 0 | – | May 8, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Blackrock, Inc. | 11.0% | 13G | Apr 7, 2026 | filing ↗ | |
| Fuller & Thaler Asset Management, Inc. | 6.0% | 13G | Aug 14, 2025 | filing ↗ | |
| Allspring Global Investments Holdings, LLC | 5.4% | 13G | Jan 13, 2025 | filing ↗ | |
| Vanguard Capital Management | 5.2% | 13G | Apr 30, 2026 | filing ↗ | |
| Vanguard Portfolio Management | 5.0% | 13G | Apr 29, 2026 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Stephen R. Scherger | $1.1M | Dec 11, 2025 | filing ↗ |
| Joseph P. Yost | $682K | Aug 25, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Material Modifications to Rights of Security Holders (3.03) | Jun 11, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Jun 11, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jun 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 11, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jun 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 11, 2026 | filing ↗ |
| New financial obligation (2.03) | May 19, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 8, 2026 | filing ↗ |
| Material agreement (1.01) | Feb 26, 2026 | filing ↗ |
| New financial obligation (2.03) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |
| Earnings (2.02) | Feb 3, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 3, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 5, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jan 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 5, 2026 | filing ↗ |
| Material agreement (1.01) | Dec 19, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 19, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 19, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 19, 2025 | filing ↗ |
| Officer/director changes (5.02) | Dec 8, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Dec 8, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Dec 8, 2025 | filing ↗ |
| Earnings (2.02) | Nov 4, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 4, 2025 | filing ↗ |
| Material agreement (1.01) | Oct 31, 2025 | filing ↗ |
| New financial obligation (2.03) | Oct 31, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Oct 31, 2025 | filing ↗ |