The file was originally extracted and resized by Grmike who used the last page of the company's April 2011 corporate presentation as the source http://investors.cubist.com/file.aspx?FID=1500033139&IID=4093793^{[dead link]} The logo agrees with what is used at the company's webpage http://www.cubist.com/ archive copy at the Wayback Machine

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This logo image consists only of simple geometric shapes or text. It does not meet the threshold of originality needed for copyright protection, and is therefore in the public domain. Although it is free of copyright restrictions, this image may still be subject to other restrictions. See WP:PD § Fonts and typefaces or Template talk:PD-textlogo for more information.