Jack Altman raised a new $275M early-stage fund in a mere week 

7 months ago 60

In Brief

Posted:

12:52 PM PDT · September 16, 2025

Jack Eric Founder Photo
  • Julie Bort

The Altman brothers sure person a knack for being task capitalists. On Tuesday, this particularly applied to Jack Altman, co-founder of $3 billion-valuation HR bundle startup Lattice and member to OpenAI CEO Sam Altman.

Jack Altman conscionable announced a second $275 cardinal money for his solo-run steadfast Alt Capital. And from commencement to finish, it took him a week, helium told The Wall Street Journal.

His archetypal fund, raised successful aboriginal 2024, was $150 million, truthful this is simply a large measurement up. He utilized it to put successful astir 20 early-stage companies, helium said, including David AI (a YC-alum that does information sets for code models) and unicorn edifice bundle maker Owner.com.

Jack is, clearly, well-connected and has laminitis experience, though helium near the CEO relation astatine Lattice successful 2024 (he remains chairman). Of course, Sam was famously president of Y Combinator and is inactive an progressive angel capitalist (but not an LP successful this caller fund, the WSJ reports). Meanwhile, member Max Altman is simply a co-founder of Saga Ventures, which raised a $125 cardinal fund of its ain successful 2024. 

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