Holden Karnofsky (born 1981) is an American philanthropist. He is co-CEO of Open Philanthropy and a co-founder and board member of GiveWell.

Further reading

Galef, Julia & Massimo Pigliucci (2011) Evidence-based philanthropy (Holden Karnofsky), Rationally Speaking, July 3.

Karnofsky, Holden (2021) The ‘most important century’ blog post series, Cold Takes, September 24.

Klein, Ezra (2021) Transcript: Ezra Klein interviews Holden Karnofsky, The New York Times, October 5.

Todd, Benjamin (2014) Interview: Holden Karnofsky on cause selection, 80,000 Hours, October 3.

Wiblin, Robert & Keiran Harris (2018) The world’s most intellectual foundation is hiring. Holden Karnofsky, founder of GiveWell, on how philanthropy can have maximum impact by taking big risks, 80,000 Hours, February 27.

Wiblin, Robert & Keiran Harris (2021) Holden Karnofsky on the most important century, 80,000 Hours, August 19.

Cold Takes. Karnofsky's blog.

Holden Karnofsky. Effective Altruism Forum account.

cause prioritization | GiveWell | intervention evaluation | longtermism | Open Philanthropy