Abstract: Reunited
| 1990 | The political change in the German Democratic Republic also spells a change in the relations between the Zeiss enterprises in the East and West. The enterprises declare their intention to fuse under the umbrella of a Carl Zeiss Foundation that would be legally domiciled in both Jena and Heidenheim. |
| 1991 | In the following years, Carl Zeiss founds two factories in Hungary, participates in a joint venture in Belarus, and opens new agencies in eastern Europe. |
| 1995 | Carl Zeiss, Oberkochen, acquires the shares held by Jenoptik GmbH in Carl Zeiss Jena GmbH and is now the sole owner. |
| 1996 | The enterprise Carl Zeiss celebrates its 150th anniversary. |