Of the funds we track, Christopher Lord's Criterion Capital had the largest position in athenahealth, Inc (NASDAQ:ATHN), worth close to $118.9 million, comprising 4.4% of its total 13F portfolio. The second largest stake is held by Viking Global, managed by Andreas Halvorsen, which held a $33.6 million position; the fund has 0.2% of its 13F portfolio invested in the stock. Other hedgies with similar optimism include Joe DiMenna's ZWEIG DIMENNA PARTNERS, Drew Cupps's Cupps Capital Management and Matthew Hulsizer's PEAK6 Capital Management.