Cubist To Announce Third Quarter 2013 Financial Results On Tuesday, October 22, 2013

Cubist Pharmaceuticals, Inc. (NASDAQ: CBST) will issue its third quarter 2013 financial results at 4:00 pm ET on Tuesday, October 22 nd, 2013. In connection with this announcement, Cubist will host a conference call and live audio webcast presentation at 5:00 pm ET that same day to discuss its third quarter financial results, business activities, and financial outlook.

The quarterly earnings call will be available via phone and webcast. The conference call dial-in information is listed below. To access the webcast, please log on to the site at least 15 minutes prior to the start of the call to ensure adequate time for any software downloads that may be required.

A replay of the webcast and teleconference will be available on Cubist’s website beginning approximately three hours after the call.

***********************CONFERENCE CALL & WEBCAST INFORMATION***********************

CUBIST Q3 2013 FINANCIAL RESULTSTuesday, October 22, 2013 at 5:00 pm ET

U.S./Canada Attendee Dial-in: (866) 706-4759International Attendee Dial-in: (484) 756-4327Attendee Passcode: 68438500

24-HOUR REPLAY U.S./CANADA: (855) 859-205624-HOUR REPLAY INTERNATIONAL: (404) 537-3406Conference ID: 68438500

CALL WILL ALSO BE BROADCAST LIVE, LISTEN ONLY, VIA THE WEB AT: https://cubist.webex.com/cubist/onstage/g.php?t=a&d=625736325 Attendee Password: 102213

Replay will be available for 90 days at www.cubist.com

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About Cubist

Cubist Pharmaceuticals, Inc. is a biopharmaceutical company focused on the research, development, and commercialization of pharmaceutical products that address significant unmet medical needs in the acute care environment. Cubist is headquartered in Lexington, Mass. Additional information can be found at Cubist’s website at www.cubist.com.

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