I don't think Gibson owns Onkyo, but I think they have a majority share. And, of course Onkyo now owns and produces the Pio AVRs.
But, we have Samsung purchasing Harmon, now we have this.
Dang! We will see how this plays out, but in general, Yamaha may become the goto AVR in the near future. I do love Yammy AVRs, my previous AVR was Yammy and my friend still runs it for his 2 channel rig. My current AVR is an older Pio Elite.
So, that really seems to leave about 3 large AVR manufacturers! I guess 4 if you count Sony (not on my list for an AVR).