Who owns the Fediverse? I mean who owns and runs the hardware that runs this system?

I've been talking to many people about the controversy with Reddit, why I left it and why I went onto Lemmy, Kbin and Mastadon instead. Some of my friends have commented that the control is still a problem as other platforms and it is all dependent on who owns the software, who owns the hardware, who are the admins, who are the...