NEW YORK--(BUSINESS WIRE)--Elliott Management Corporation (“Elliott”), which manages funds that own common stock and economic equivalents representing 8.9% of the outstanding common stock of athenahealth, Inc. (NASDAQ: ATHN) (the “Company” or “athenahealth”), today released a letter outlining a proposal to acquire athenahealth for $160 per share in cash, representing a premium of 27% to the current stock price.