Portfolio Co Investors 2026 for Mark J Horowitz: investors, rounds, and co-investor patterns from StartupFundraising.com research, updated for 2026.
Mark J Horowitz covers 5 companies with a founder-verified check from Mark J Horowitz, concentrated in Healthtech, AI Infrastructure, SaaS. Round sizes are not disclosed for these companies, so this report lists the verified positions rather than dollar totals.