Sean Parker (born December 3, 1979) is an American entrepreneur and philanthropist who cofounded the
file-sharing computer service
Napster and served as the first president of the
social networking website
Facebook. He also cofounded
Plaxo,
Causes,
Airtime, 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. As of November 2015, Parker's net worth was estimated to be
US$2.5 billion.