Actually it's a little bit more complicated: the appliances are made by a company called BSH (https://en.wikipedia.org/wiki/BSH_Hausger%C3%A4te) which was originally (since 1967!) a joint venture between Siemens and Bosch, but Siemens withdrew from it in 2014, and since then it's a fully owned subsidiary of Bosch (but still uses the Siemens brand as well as some other brands such as Gaggenau, Neff, Thermador etc.).