Holden Karnofsky

Type: Person

As of November 2026, Holden Karnofsky has been mentioned in one podcast episode on The Ezra Klein Show (Dec 2025).

Holden G. Karnofsky is an American nonprofit executive. Karnofsky co-founded the charity evaluator GiveWell with Elie Hassenfeld in 2007. He co-founded in 2014 the grantmaking organization Open Philanthropy, and was its CEO and later co-CEO until 2023. He joined Anthropic in 2025.

Holden Karnofsky at a glance
Mentioned in	1 episode on 1 podcast (as of November 2026)
First heard	Dec 2025 on The Ezra Klein Show
Role	Co-CEO
Affiliation	Open Philanthropy

Who talks about Holden Karnofsky on podcasts?

Holden Karnofsky came up; the most recent mention was Dec 2025 on The Ezra Klein Show.

The Simplest Way to Save Lives With Your Money | The Ezra Klein Show on The Ezra Klein Show (Dec 2025)

What is Holden Karnofsky mentioned alongside?

Holden Karnofsky is most often mentioned alongside Randomized controlled trial (RCT), Honduras and supermobile.com.

Mentioned together: Randomized controlled trial (RCT), Honduras, supermobile.com, United States (US), givewell.org, UCLA Speed Test, T-Mobile, Doctors Without Borders, New York Times Opinion, Nick Kristof