The venture capital fund was started in June 2009 with an initial capital of $300 million. In September 2009 the firm invested $50 million for 2% of Skype stock. They also own stock of Zynga, Digg, Foursquare and other high-tech companies. At the beginning of November 2010, the company announced that they raised another $650 million for a second venture fund. In February 2011, Andreessen Horowitz invested $80 million in Twitter,[4] being the first venture firm that holds stock in all four of the highest-valued privately held social-media companies: Facebook, Groupon, Twitter and Zynga.