I think sometimes they get spun into their own legal entity, I'm thinking about Yahoo's and Naspers. In Naspers case their investment in Tencent is worth so muc

I think sometimes they get spun into their own legal entity, I'm thinking about Yahoo's and Naspers. In Naspers case their investment in Tencent is worth so much that actually Tencent's value is what drives most of Naspers stock price https://en.wikipedia.org/wiki/Naspers https://en.wikipedia.org/wiki/Naspers