You might want to explain why you want this information. What’s in it for me if I share?
Yesterday there was a lot of discussions about the section "You’re in good company" from https://rubyonrails.org
Some companies from there are not using Ruby on Rails anymore. Some are using it with other languages, some are using it fully.
I then took a look at https://toprubycompanies.info and it does not seem to have more up to date data.
Thus I want to know who is still using Ruby and the size of the company. If I get enough relevant information I promise to make it public via either my newsletter (ShortRuby) or via a blog post.