It’s there other way around. Robert Bosch acquired the stake in Siemens. So Bosch owns Siemens.
https://web.archive.org/web/20140923104028/http://www.rttnew...
The article says Bosh bought Siemens' stake in BSH Hausgeräte (which does use the Siemens brand for some of it's home appliance models), not that Bosh acquired a stake in Siemens.