So in a normal case, Waymo itself wouldn't have a separate filing for incorporation, or tax status etc... which means it's wouldn't have it's own stock.
I don't know how it works, but it does. I have friends who worked at Waymo and got Waymo stock (well, options that can be exercised for stock). I suppose that would make it not a wholly owned subsidiary, considering that some of the employees own some of it?
Unless this changed recently (which it may well have), Waymo "stock" is just a special performance scheme that converts to Alphabet stock based on waymo, not alphabet, performance.
I don't know how it works, but it does. I have friends who worked at Waymo and got Waymo stock (well, options that can be exercised for stock). I suppose that would make it not a wholly owned subsidiary, considering that some of the employees own some of it?