History
| 25.02.1957 | Foundation of partnership Heinz Penner / Peter Scheibe |
| 01.01.1965 | Single office of Heinz Penner at Goethestr. 11 |
| 24.09.1976 | Foundation Buck & Penner Wirtschaftsprüfungsgesellschaft mbH (now Penner + Lanfermann Treuhand GmbH) |
| 01.01.1979 | Relocation to the office Schumannstr. 61-63 |
| 01.05.1980 | Foundation of partnership Heinz Penner / Dr. Peter Feldhausen |
| 01.10.1993 | Foundation of partnership Heinz Penner / Dr. Peter Feldhausen / Jörg Penner |
| 01.01.1996 | Relocation to the office Humboldtstr. 10 |
| 01.07.1996 | Foundation of partnership Heinz Penner / Jörg Penner |
| 01.01.1997 | Foundation of partnership Heinz Penner / Jörg Penner / Ines Lanfermann / Erika Zeileis |
| 25.02.2007 | 50 years Penner + Partner mbB |
| 30.10.2011 | Death of the company founder Heinz Penner |
| 01.01.2013 | Member firm of Enterprise Worldwide |