- 1985 Foundation of Rainer May GmbH by Rainer May, Managing Director. Production in hired premises with three employees.
- 1990 Construction of own 1,200 m² production premises, including administrative headquarters. Staff members: 10.
- 1996 Extension of the production premises by adding a further production hall. Acquisition of a waterjet cutting machine. Staff members: 15.
- 2004 Acquisition of 6,000 m² production and administration premises. Modern machinery equipped with the latest technology. Staff members: 40.