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Person

Jack Altman

Entrepreneur and investor; co-founded the HR software company Lattice in 2015 and was its CEO until January 2024; brother of Sam Altman.

4 links, 3 backed by primary records

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Family ties
Over time
  1. CEO of Lattice 2015 – 2 Jan 2024
  2. chair of Lattice (executive chairman) 2 Jan 2024 –

Connections 4

founded

CEO of

  • Lattice 2015 – 2 Jan 2024 Primary record 3

    CEO from the founding until 2 January 2024, when Sarah Franklin took over.

chair of

  • Lattice 2 Jan 2024 – executive chairman Primary record 34

younger brother of

Timeline 3 dates
  1. 2015 Jack Altman founded Lattice
  2. 2015 – 2 Jan 2024 Jack Altman CEO of Lattice
  3. 2 Jan 2024 – Jack Altman chair of Lattice
Proof 4 sources
  1. Sam Altman’s Manifest Destiny, The New Yorker, 3 Oct 2016. Scholarship & press
    Jack co-founded a performance-management company, Lattice, which had just gone through YC.
    One evening at Altman’s house, his younger brothers, Max and Jack, were teasing him that he should run for President in 2020, when he’d be thirty-five: just old enough.
  2. Lattice (Y Combinator company page), Y Combinator. Primary record
    Founded: 2015
  3. The Next Chapter, Lattice, 12 Dec 2023. Primary record
    On January 2nd, Sarah will be CEO and I’ll be Executive Chairman.
    I’ve been running Lattice for over eight years, and I’ve loved almost all of it.
  4. Jack Altman raised a new $275M early-stage fund in a mere week, TechCrunch, 16 Sep 2025. Scholarship & press
    he left the CEO role at Lattice in 2024 (he remains chairman)
    On Tuesday, this especially applied to Jack Altman, co-founder of $3 billion-valuation HR software startup Lattice and brother to OpenAI CEO Sam Altman.
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