Seth Demsey
Angel investor in Arlington
Arlington, Virginia
Seth Demsey, Angel investor in Arlington is an active investor based in Arlington, Virginia. This profile covers what Seth Demsey backs, at which stage, and how founders can reach out in 2026.
Mr. Seth Demsey is a Co-Founder & serves as Co-Chief Executive Officer at Corvex. Mr. Demsey is an Angel Investor. He is the driving force behind the company's technical vision and innovation. With three decades of experience, Seth has architected and operated highly impactful AI/ML and developer platforms at startups he's co-founded and for giants like NASA's Advanced Computational Concepts Lab, Microsoft, Google, and AOL / Yahoo!. He holds over 65 patents spanning high-performance computing, distributed systems, security, and data management. Seth is passionate about empowering developers and teams to push the boundaries of what's possible with AI-and building the infrastructure to make it real. He is an accomplished guitarist who knows a few things about Weezer.
- Investor type
- Angel
- Stages
- Early Stage Venture
- Invests in
- Artificial IntelligenceDeveloper Tools & DataSaaS & Enterprise
- Location
- Arlington, Virginia
- Typical check
- $500K
- Past investments
- 2
Notable investments
How to reach Seth Demsey
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Cite this page
Round Funded. "Seth Demsey." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/seth-demsey-106097-4
Frequently Asked Questions
What does Seth Demsey invest in?
Seth Demsey invests in Artificial Intelligence, Developer Tools & Data and SaaS & Enterprise, typically at Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does Seth Demsey invest at?
Seth Demsey typically invests at Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is Seth Demsey's typical check size?
Seth Demsey typically writes checks around $500K. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.