Here is the list of FBA companies with their counts of certified developers as of June 2017. Rumor has it that the "Find a Partner" may be changing in the near future, which would break this web-scrape update. So this may be the last version of this working, but here it is attached. I'm sure I'll be seeing a bunch of fellow certified developers at Devcon 2017 next month!
Congrats to Soliant and 株式会社サポータス for having the most people certified in FileMaker 15!!!!
If your company's count is short, make sure to have your company FBA rep log into their account and make sure all of the staff certifications numbers are provided!