Naughty Dog seem like a relatively large team. If you're thinking a megacorp tech team, there seems to be few examples of truly large successful Lisp projects,

Naughty Dog seem like a relatively large team. If you're thinking a megacorp tech team, there seems to be few examples of truly large successful Lisp projects, though it will be interesting to see how some of the growing Clojure companies get on in the next 5-10 years.