I updated the comment, It's really weird. They bought a part but also effectively gave Rimac the Bugatti company. One can argue that they basically leveraged Bugatti to acquire some control of Rimac and board seats without spending actual money.
Not that complicated. Porsche was once described as "the hedge fund that happens to also build cars".
Porsche did this stake here and there thing precisely to gain > 50% of Rimac voting rights.
It's simple really: Porsche controls Rimac.
Then there's the whole "VW took control of Porsche after the short squeeze made by Porsche to try to acquire VW failed" (it failed due to the sudden crash during the 2008 banking crisis IIRC). And now Porsche is apparently spinning out of VW and shall be independent again.
They have a glorious flowchart on their site. https://web-cdn.rimac-automobili.com/wp-content/uploads/2021...