| CCK | Crown |
| PKG | Packaging Corporation of America |
| KRT | Karat Packaging |
| REYN | Reynolds Consumer Products |
| GPK | Graphic Packaging Company |
| IP | International Paper Company |
| WRK | WestRock |
| AVY | Avery Dennison |
| SON | Sonoco Products Company |
| GEF | Greif |
| MYE | Myers Industries |