You will struggle to find this information for three reasons: a)...

You will struggle to find this information for three reasons: a) they are fully privatised b) All the entities they purchased were private prior to acquisition c) still integrating so you will have to scour through pages and pages of LinkedIn etc. But I can help you on the employee count. They are upwards of 500. Revenues, my guess would be at least ten times what that link is reporting. And they are about 14 odd companies in the mix, not 21. That link is way off.