Holden Karnofsky

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Holden G. Karnofsky (born 1980 or 1981) is an American nonprofit executive. Karnofsky co-founded the charity evaluator GiveWell with Elie Hassenfeld in 2007. In 2014, he co-founded the grantmaking organization Open Philanthropy (now called Coefficient Giving), and was its CEO and later co-CEO until 2023. He joined Anthropic in 2025.

Read on Wikipedia · Image Noah Berger/Open Philanthropy, CC BY-SA 4.0