In October 2009, the company was founded as OS76 by John Colgrove and John Hayes. Mike Speiser of Sutter Hill Ventures was an early board member. It raised a $5 million series A round led by Sutter Hill. In August 2012, Pure Storage raised $40 million in series D funding round led by Index Ventures partner Mike Volpi, along with existing investors. An investment of undisclosed amount from In-Q-Tel (associated with the US Central Intelligence Agency) was announced in May 2013. Another investment (round "E") of $150 million was announced in August 2013, including T. Rowe Price and Tiger Global Management.