Sean Parker (born December 3, 1979) is an American entrepreneur and philanthropist, most notable for co-founding the file-sharing computer service Napster, and serving as the first president of the social networking website Facebook. He also co-founded Plaxo, Causes, Airtime. com, and Brigade, an online platform for civic engagement. He is the founder and chairman of the Parker Foundation, which focuses on life sciences, global public health, and civic engagement. On the Forbes 2016 list of the world's billionaires, he was ranked #722 with a net worth of US$2. 4 billion.