| 1962 | as first step to the paper industry complex, the straw pulp mill began its operation |
| 1966 | the first run of PM 1 |
| 1967 | the first run of PM 2 |
| 1976 | the first run of PM 3 for brown paper the corrugator went into operation, with this step the paper industry complex became complete |
| 1990 | foundation of Dunapack Ltd, ownership structure: 60% Hungarian State, 40% Prinzhorn Group |
| 1995 | the Prinzhorn Group gained full ownership in Dunapack Ltd |
| 2007 | Establishing Hamburger Hungaria Ltd, November 9th – laying the foundation stone of the new paper mill for PM 7 |
| 2008 | October 14th – topping out ceremony of the new paper mill |
| 2009 | July – startup of PM7 |
| 2009 | December – Establishing Hamburger Dunaújváros Ltd. |