Elliott reveals stake in Athenahealth, seeks to engage with board

May 18 (Reuters) - Activist investor Elliott Management disclosed a 9.2 percent stake in Athenahealth Inc on Thursday, calling the healthcare software provider's shares "significantly undervalued."

Athenahealth's shares jumped 15.7 percent to $123 in trading before the bell.

Elliott would seek to engage in a dialog with Athenahealth's board regarding opportunities to increase shareholder value, the investor said in a regulatory filing. (Reporting by Natalie Grover in Bengaluru; Editing by Sai Sachin Ravikumar)