Mark J Horowitz

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.

• Verified portfolio companies: 5
• Sector mix: Healthtech 1 · AI Infrastructure 1 · SaaS 1 · Developer Tools 1
• Headquarters mix: Bellevue 2 · San Francisco 1 · Fremont 1 · Portland 1

Mark J Horowitz — verified positions

• Spire Health
• Pivotal Systems
• iSpottv
• Donuts
• Apex Trading

Mark J. Horowitz — related firms and companies (56)

• Steven Leischner
• Daniel Fabian
• Opto Custom GP 2023 LLC
• Strategic Equity Capital NY LLC
• Jin Hing Chin
• Marc K. Furstein
• Fady Abdel-Nour
• Antler Special Opportunities GP I LLC
• Lexington Partners GP Holdings X, L.L.C.
• Blackstone Property Associates Europe L.P.
• Blackstone Property Associates Europe Ltd.
• Israel A. Englander
• Kristin Hester
• Briarwood Capital Partners GP LLC
• Oep Capital Advisors, L.P.
• Adrienne Saunders
• Antler Special Opportunities GP II LLC
• Victor L. Wu
• Nadeem Meghji
• Nentcho Nentchev
• Timothy P. Whelan
• Ramzi S. Musallam
• Alpine Peaks Capital, LP
• Joerg Zirener
• Esther Dyson
• Elodie Dupuy
• Wilson S. Warren
• Allie Sweeney
• LLC Boulder Hill Total Return MM
• Brian J. Hoesterey
• iCapital HF GP, LLC
• Stefan Brundobler
• J.B. Cherry
• Bruce Pollack
• Governors Lane Fund General Partner LLC
• Jacob Werner
• Michael Anthony
• Jonah Midanik
• John Douglas Smith
• Alun Williams
• Sandeep Alva
• Matthew D Malone
• Mark J. Horowitz co-investors 2026
• Thomas S. Giannetti
• Kristin McGrath
• Leon Volchyok
• James Murphy
• VanEck Associates Corporation
• H. Kim Lee
• Matthew B. Smith
• Ali Hamed
• Christopher Walsh
• iCapital Strategies LLC
• Blackstone Property Associates Europe (Delaware) L.L.C.
• Brett Newman
• Sean Rhatigan

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