The most interesting recent acquisition of this kind I'm aware of is the Bose acquisition of McIntosh. As this article [0] notes:
Dr. Amar Bose donated the majority of his namesake company to his alma mater, the Massachusetts Institute of Technology. So technically, MIT now owns both McIntosh and Sonus faber, two of the biggest players in luxury audio. (MIT has non-voting shares of Bose, so although the university owns the majority of the company, it does not control business decisions.)
Dr. Amar Bose donated the majority of his namesake company to his alma mater, the Massachusetts Institute of Technology. So technically, MIT now owns both McIntosh and Sonus faber, two of the biggest players in luxury audio. (MIT has non-voting shares of Bose, so although the university owns the majority of the company, it does not control business decisions.)
[0] https://www.audioholics.com/news/bose-acquires-mcintosh