EPAM Systems Inc. will replace Kansas City Southern in the S&P 500 effective before trading on December 14. EPAM provides software product development and digital platform engineering services to global clients. Last month, EPAM reported third-quarter FY21 revenue growth of 51.6 percent year-on-year to $988.5 million, beating consensus. Non-GAAP EPS of $2.42 beat the consensus…