August 10, 2018 - The possibility of an athenahealth acquisition may be increasing as three potential buyers enter a second round of bidding. UnitedHealth Group, TPG, and Bain Capital are among the second round of bidders, according to Seeking Alpha. UnitedHealth Group is a for-profit Minnesota-based healthcare company. The company includes healthcare coverage and benefits services provider UnitedHealthcare and health IT services provider Optum. TPG and Bain Capital are investment firms based in San Francisco and Boston, respectively.