Not a lot of people
Only 53,000. I worked for a UK based IT company in the last millennium that had 30,000 people. We were big in the UK, SA & Australia and a few ex-colonies with a modest presence in Europe and almost unknown elsewhere. Known - was to other IT cognescenti. No public dealing.
Yet this company with less than twice the number permeates almost every connected person and business worldwide - that's billions. Indeed many of us are too dependent on their services for both work and play. They are perhaps the most successful company in doing business automatically without the involvement of much grey matter. The first real AI company?