| 2024 | Gerald Prinzhorn joins the Group at CEO |
| 2023 | Prinzhorn Group steps into Italy |
| 2021 | Newly established Management Board formed by three divisional managing directors and CFO |
| 2013 | Dentaş Ambalaj was acquired in Türkiye |
| 2013 | Cord Prinzhorn was appointed as CEO |
| 2007 | Hamburger Recycling Group was founded to collect secondary raw materials and provide the papermills with waste paper |
| 1995 | Mosburger fully acquired Dunapack |
| 1990 | Mosburger acquired 40% of Dunapack shares in Hungary and fully took over in 1995 which triggered the expansion to Eastern Europe |
| 1989 | Rieger family sold their company to W. Hamburger |
| 1972 | Thomas Prinzhorn took over the management of W.Hamburger, as CEO |
| 1959 | W. Hamburger acquired Mosburger |
| 1912 | Johann Rieger founded a papermill in Trostberg, Germany |
| 1866 | Anton Mosburger founded a corrugated plant in Vienna, Austria |
| 1853 | Wilhelm Hamburger founded a papermill (W. Hamburger) in Pitten, Austria |
