The Lattice co-founder and brother of OpenAI’s Sam Altman doubles down on early-stage investing with a second, significantly larger fund.
A Lightning-Fast Raise for Alt Capital
Jack Altman, co-founder of HR software startup Lattice, has pulled off a rare VC feat—raising $275 million in just one week for his firm Alt Capital.
- The announcement marks Alt Capital’s second fund, a major jump from its first $150 million fund raised in early 2024.
- Altman told The Wall Street Journal that this rapid raise reflects both strong investor confidence and his networking power in early-stage tech circles.
From Startup CEO to Solo Capitalist
Jack Altman’s founder pedigree plays a central role in his investor appeal.
- He led Lattice—a company now valued at $3 billion—until stepping down as CEO in 2024. He continues to serve as chairman.
- His first fund backed around 20 startups, including:
- David AI, a YC-backed startup focused on datasets for speech models
- Owner.com, a restaurant software company now valued as a unicorn
Alt Capital is structured as a solo-run firm, reflecting a growing trend among experienced operators turning to single-GP venture models.
A Family Steeped in Venture Capital
The Altman brothers seem to have venture in their DNA.
- Sam Altman, Jack’s older brother, is best known as the CEO of OpenAI and the former president of Y Combinator. Though Sam is a prominent angel investor, he is not an LP in Jack’s new fund, per the WSJ.
- Another brother, Max Altman, co-founded Saga Ventures, which raised a $125 million fund of its own in 2024.
Jack’s success adds to the Altman family legacy in tech and investing, showcasing how deep founder experience and elite networks can accelerate capital formation—even in today’s more cautious funding environment.
Why This Matters
Jack Altman’s fundraise highlights several key trends in venture capital:
- Speed of capital formation for well-connected solo GPs is accelerating.
- Early-stage investing remains vibrant for those with strong track records.
- LPs are still eager to back funds tied to founders who’ve built real businesses, especially in enterprise software and AI.
Alt Capital’s expansion also suggests that the solo capitalist model is maturing, and may become a dominant force in seed and Series A investing over the next decade.
