In August 2008, SpaceX accepted a US$20 million investment from Founders Fund.[87] In early 2012, approximately two-thirds of the company stock was owned by its founder [88] and his 70 million shares were then estimated to be worth US$875 million on private markets,[89] which roughly valued SpaceX at US$1.3 billion as of February 2012.[90] After the COTS 2+ flight in May 2012, the company private equity valuation nearly doubled to US$2.4 billion or US$20/share.[91][92]