Stephen Marcus
Co-Founder & General Partner at Riot Ventures
Los Angeles County, California
Stephen Marcus, Co-Founder & General Partner at Riot Ventures is an active investor based in Los Angeles County, California. This profile covers what Stephen Marcus backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPE
- Stages
- Pre SeedSeedSeries ASeries BLate Stage Venture
- Invests in
- Robotics & AutomationSaaS & EnterpriseConsumer & RetailFintechSpace & AerospaceCybersecurityArtificial Intelligence
- Location
- Los Angeles County, California
- Typical check
- $1M
- Past investments
- 19
Notable investments
Simbe RoboticsToast, Inc.
AquaCloudBlue Water Autonomy
OktaOkta, Inc.
Moda Operandi
Stripe
SentenaiHow to reach Stephen Marcus
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Connect with Stephen Marcus
Frequently Asked Questions
What does Stephen Marcus invest in?
Stephen Marcus invests in Robotics & Automation, SaaS & Enterprise, Consumer & Retail and Fintech, typically at Pre Seed, Seed, Series A and Series B. Match your sector and stage, then reach out with a personalized pitch.
What stage does Stephen Marcus invest at?
Stephen Marcus typically invests at Pre Seed, Seed, Series A and Series B. Lead with traction that fits the stage when you reach out.
What is Stephen Marcus's typical check size?
Stephen Marcus typically writes checks around $1M. Use it as a signal for whether your raise fits their stage.
How do I contact Stephen Marcus?
Unlock Stephen Marcus's verified email on Round Funded Accelerator and send a personalized pitch. We surface only deliverable contacts so your outreach lands.