Nathaniel Horwitz

Nathaniel Horwitz is an Australian-American investor, entrepreneur, and investigative journalist. He is the co-founder of Mayday Health and Hunterbrook, where he is CEO.

Early life and education

Horwitz was born in Washington D.C. to Tony Horwitz and Geraldine Brooks, the elder of two sons. The family split time between Sydney, Massachusetts, and Virginia.
As a student, Horwitz worked on biotech startups. While at Harvard, Horwitz met Sam Koppelman, with whom he would later found Mayday Health and Hunterbrook.

Career

After graduating from Harvard, Horwitz joined RA Capital Management, a healthcare-focused investment firm. While at RA Capital, Horwitz launched biotech companies. He left RA Capital in 2023, before founding Hunterbrook.
In 2022 Horwitz co-founded Mayday Health with Koppelman and Liv Raisner. The 501 nonprofit educates on abortion access and advocated for laws to shield healthcare providers who send abortion medicine to people in states with abortion bans.
In 2023, Horwitz and Koppelman founded Hunterbrook, an investment fund and investigative journalism outlet, with Horwitz as CEO. Hunterbrook later $100 million in 2024 "to make trades based on articles by its affiliated newsroom". The company's name is partially derived from Horwitz's mother's last name.