Google doesn’t have a million employees. It also doesn’t have company barracks, if a google engineer wants to off themselves they’re probably going to do it at home or on the Bay Bridge, not at headquarters. Where you probably can’t open the windows on the upper floors.
But if you can find suicide rates of google employees – not just on-site, but overall, I’m all ear. You can look at literally any population, it’s never going to be zero.