My company is well over that number. I probably only know about a quarter of the stacks... And even within those, there is a lot of variation. There are java heavy stacks, python heavy stacks, nodejs, Ruby. Lots of systems level stuff in C, C++, Java. I can't even speak to any front end frameworks (although I know there are at least a few). Almost every other application you could think of is in use somewhere... Nagiod, Sensu, Icinga, OpenNMS, memcached, redis, nginx, Apache, redshift, MySQL, postgresql, rabbitmq, zeromq, Ansible, Chef... This is likely barely scratching the surface.
Don't companies over $100 million use almost every major stack?