Christopher Isaac "Biz" Stone[1][2] (born March 10, 1974)[3] is an American entrepreneur who is a co-founder of Twitter, among other technology companies.

[9] Stone made his directorial debut in 2012, working alongside Ron Howard and Canon USA to direct a short film, Evermore, as a part of Project Imaginat10n.

[10] Stone is also an advisor to Zoic Studios, and an Executive Producer of the documentary Eating Animals along with Natalie Portman.

[14] Aside from Twitter, Stone is an angel investor and advisor in the startup community having backed companies such as Square, Slack, Medium, Nest, Beyond Meat, Pinterest, Intercom, and Faraday.

Upon delivering the 2011 commencement, Babson College awarded Stone their highest honorary degree, a Doctor of Laws.

[32] He and his wife founded and operate the Biz and Livia Stone Foundation, which supports education and conservation in California.