Investors are piling into the analytics and artificial intelligence upstart.It finally happened. After seeing its stock appreciate by more than 250% just this year, Palantir (PLTR 11.14%) has now surpassed legendary defense contractor Lockheed Martin in market capitalization. The software and artificial intelligence (AI) provider for the government, military, and big business is posting strong revenue growth and inflecting profits. It just reported Q3 earnings, which has propelled the stock up 40% in the pa ...