Responded to another thread but Pitchbook or Crunchbase can both be helpful.

Try: https://www.crunchbase.com/hub/software-companies-late-stage...

Isn’t the Series D or E when a painful restructure or layoffs or pivot occurs or is that a later round?

For identifying companies by size/funding/vertical sure. Been a while since I used it (thank god I got out of sales) but they almost definitely track headcount growth if not actual openings. Trouble is you probably won’t find it in the free version