Nathaniel Horwitz

Nathaniel Brooks Horwitz is an Australian-American entrepreneur, venture capitalist, and journalist. He is the co-founder of Mayday Health and Hunterbrook, and was previously a partner at RA Capital Management.

Nathaniel Horwitz
Alma mater	Harvard University (AB)
Occupation(s)	Journalist Venture capitalist
Known for	Mayday Health Hunterbrook
Parents	Tony Horwitz (father) Geraldine Brooks (mother)

Early life and education

Nathaniel Horwitz was raised in Martha's Vineyard. His father Tony Horwitz, was a Pulitzer Prize-winning journalist and author of Confederates in the Attic. His mother, Geraldine Brooks, is a Pulitzer Prize-winning author of several books, including People of the Book and Caleb's Crossing.^[1] Both of his parents were previously correspondents at The Wall Street Journal. Through his mother, Horwitz is Australian. His family split their time between Virginia, Sydney, and Martha's Vineyard.^[2]

Horwitz graduated from Martha's Vineyard Regional High School before attending Harvard University, where he received a degree in molecular and cellular biology in 2018.^[3] As a student, Horwitz wrote for The Harvard Crimson and invested in and founded biotech startups.^[4][5] While at Harvard, Horwitz met Sam Koppelman, with whom he would later found Mayday Health and Hunterbrook.^[6] He also founded

Career

After graduating from Harvard, Horwitz joined RA Capital Management, a biotech focused venture capital and asset management firm. He left RA Capital in 2023, shortly before founding Hunterbrook. While at RA Capital, Horwitz founded four biotech companies.^[7]

Mayday Health

In 2022, after the Supreme Court's decision in Dobbs v. Jackson, Horwitz, along with Koppelman and Olivia Raisner, co-founded Mayday Health. The three were roommates in Virginia at the time.^[8] The nonprofit focused on providing education and information on abortion access.^[9] Horwitz became CEO upon the organization's launch before stepping down in 2023. After his departure, Horwitz became Mayday Health's executive chair.^[10]

Hunterbrook

In 2023, Horwitz and Koppelman founded Hunterbrook, a hedge fund and investigative journalism outlet.^[11] Horwitz became CEO of both Hunterbrook Media and Hunterbrook Capital, which raised $100 million in seed funding upon its launch.^[12][13] The company's name is partially derived from Horwitz's mother's last name.^[14]

Personal life

Horwitz lives in New York.^[15]