Ranked #1 by Gartner. By revenue, which is believable, though not useful.
https://www2.deloitte.com/global/en/pages/risk/articles/delo... (click the read more button for the text)
https://www2.deloitte.com/global/en/pages/risk/articles/delo... (click the read more button for the text)
Come to think of it, should have taken the deal and ran with it.