SEGMENT INFORMATION

9 Months Ended

Sep. 30, 2013

SEGMENT INFORMATION

SEGMENT INFORMATION

M.   SEGMENT INFORMATION

Cubist has one operating segment, the research, development and commercialization of pharmaceutical products that address unmet medical needs in the acute care environment. The Company’s entire business is managed by a single management team, which reports to the Chief Executive Officer. For both the three months ended September 30, 2013 and 2012, the Company generated approximately 95% of revenues within the U.S. For both the nine months ended September 30, 2013 and 2012, the Company generated approximately 94% of revenues, within the U.S. As of September 30, 2013 and December 31, 2012, substantially all of the Company’s long-lived assets were held within the U.S.