One place I know of that, in an odd way, gives 25 is Intel, at least if you stay a while. You start at 15 days, get bumped to 20 after some years, and then ever

One place I know of that, in an odd way, gives 25 is Intel, at least if you stay a while. You start at 15 days, get bumped to 20 after some years, and then every 7 years you get an 8-week sabbatical on top of that. That adds effectively another ~5.7 days/year, but taken as a bloc.