Portfolio Co Investors 2026 for Jack Altman: investors, rounds, and co-investor patterns from StartupFundraising.com research, updated for 2026.
Jack Altman accounts for 4 tracked companies with verified cap-table data, 4 of which disclose round sizes totalling $337M. The median disclosed raise is $58M, and the largest is NexHealth at $177M, ahead of Forma ($58M) and Career Karma ($52M).
The names that recur most often on these co-invested cap tables are Jack Altman (4 companies), Lachy Groom (2 companies), Buckley Ventures (1 company), Point Nine Capital (1 company), Jeffrey Katzenberg (1 company), Naval Ravikant (1 company). By latest disclosed round, the market skews Series B (2), Series C (1), Series A (1).