Priscilla Chan (born February 24, 1985), also known as Priscilla Chan Zuckerberg, is an American pediatrician and philanthropist. She and her husband Mark Zuckerberg, the co-founder and CEO of Facebook, Inc., established the Chan Zuckerberg Initiative in December 2015, with a pledge to transfer 99 percent of their Facebook shares, then valued at $45 billion. She is a graduate of Harvard University and received her medical degree from the University of California, San Francisco (UCSF).
On February 24, 1985, Chan was born in Braintree, Massachusetts, and grew up in Quincy, Massachusetts, a suburb of Boston. Her parents were Chinese refugees who fled Vietnam in refugee boats. She grew up speaking Cantonese and served as an interpreter for her grandparents. She has two younger sisters. In 2003, she graduated as class valedictorian from Quincy High School and was voted "class genius" by her classmates. According to a Facebook post by Mark Zuckerberg, Chan is a Buddhist.