From 2008 to the present, I’ve been an active angel investor in the following companies, both on my own and through J-AngelsThe Angels Forum and TiE, where I’ve been a charter member. Here is a list of some of my private investments:


  • Hands-On Video Relay Services, acquired by Purple Communications for $70 million for an 8X return
  • Filtrbox, sold to Jive Software, which subsequently went public, generating a 6X return
  • RhythmOne, which provides a brand-safe programmatic marketplace for digital media advertising at scale across all screens
  • Alibaba, China’s largest e-commerce company
  • Spotify, the world’s largest on-demand music service
  • Duo Security, a cloud-based access security provider, acquired by Cisco for $2.35B
  • Uber, the world’s largest mobile-app based transportation network
  • Tencent Music Entertainment, the leading Chinese music platform, with more than 630 million monthly active users


  • PM Pediatrics, a “do well by doing good” startup in the pediatric urgent care market
  • Proxio, which provides a LinkedIn-type service for the international real estate market
  • RenovoRx, a medical devices company that is developing solutions for the targeted delivery of drugs to vascular organs
  • Bolt Threads, a synthetic biology company that produces natural fibers (e.g. silk, leather) for the global textiles market
  • Glue Networks, which offers a suite of intelligent cloud-based networking solutions for WANs
  • Broadly, which provides SaaS-based automated marketing for local SMBs that builds online reviews and SEO, helping drive new customers
  • Catawiki, Europe’s fastest growing online specialty auction site
  • Cerium Pharmaceuticals, which is exclusively dedicated to developing medicines for patients with unmet needs
  • Ant Financial, which operates Alipay, the world’s largest mobile and online payments platform, as well as Yu’e Bao, the world’s largest money-market fund
  • Elemental Machines, an integrated IoT data science platform that gives customers actionable insights about the equipment and environment
  • Indigo, an agricultural technology company that works with plant microbes, aiming to improve yields of major crops
  • Transferwise, a British online money transfer service that is disrupting the worldwide currency exchange market
  • Spotlight Therapeutics, a pioneer in In Vivo CRSPR technology
  • Strateos, a robotic cloud laboratory for the life sciences
  • Heliogen, a clean energy company focused on eliminating the need for fossil fuels
  • Monetize360, a disruptive, end-to-end, next-generation billing platform
  •, an AI-driven insights platform that helps identify patterns in a customer’s data that are affecting KPIs
  • Homingos, an AR smart photo/video consumer app
  • Resonado Labs, a developer and licensor of streamlined speaker architecture that enables innovative product designs with optimal acoustic performance