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Berkshire Hathaway has 25 office staff: http://www.businessinsider.fr/us/berkshire-hathaway-omaha-of...

"It's well-known that Berkshire Hathaway keeps a small headquarters with these 25 staffers, who manage some of the most important affairs of this $329 billion company."

I don't think you need that many people to manage $6.3 billions.

Also, I worked at a hedge fund managing $12 billions and we were ~150 (but this is a completely different job than what staffers at Stanford or Berkshire Hathaway are doing)