| 1871 | Founding of Dreyse & Kronbiegel Metallwarenfabrik; invention and production of the firing pin and production of the first breechloading rifle featuring a firing pin |
| 1901 | Rheinmetall AG Sömmerda: production of detonators, firearms and weaponry parts |
| 1919 | Rheinmetall AG Sömmerda: production of mechanical typewriters, calculating and accounting machines, cardan shafts, and universal joint shafts |
| 1933 | Rheinmetall AG Sömmerda: production of modern office machinery and weaponry parts |
| 1946 | Rheinmetall - Borsig SAG: production shifts to office machines, cameras, moped engines, and other consumer goods |
| 1969 | VEB Robotron Büromaschinenwerk Sömmerda: production of printers, automatic billing machines, and personal computers |
| 1991 | Privatization of the foundry by Leibfried-Mahle GmbH: production of aluminum castings for the electrical, mechanical-engineering, and automotive industries |
| 1994 | Acquisition by SAPA GmbH Berlin: production of aluminum castings for the electrical, mechanical-engineering, and automotive industries |
| 1997 | Acquisition by Metallwerke Harzgerode GmbH: production of aluminum castings for the automotive industry |
| 2001 | Acquisition by TRIMET AG Düsseldorf and merger with Aluminium Essen GmbH, Aluminium Recycling GmbH Gelsenkirchen, and Metallwerk Sömmerda; group renamed TRIMET ALUMINIUM GMBH |
| 2002 | TRIMET ALUMINIUM GMBH becomes TRIMET ALUMINIUM AG |
| 2013 | Change in company's legal form: TRIMET becomes an SE (Societas Europaea) |
| 2018 | TRIMET takes its automotive division into a joint venture with the Chinese automotive specialist Bohai Automotive Systems Co., Ltd. The merger opens up additional perspectives for BOHAI TRIMET Automotive as a system supplier to increasingly global automotive manufacturers and thus strengthens the two production sites in Harzgerode and Sömmerda for the long term. |
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