Justin Marcus
Angel investor in London
London, England
Justin Marcus, Angel investor in London is an active investor based in London, England. This profile covers what Justin Marcus backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCFounderInvestor
- Stages
- Seed
- Invests in
- FintechWealthTechHealthcare & BiotechDigital Health & HealthTechBiotech & PharmaSaaS & EnterpriseCrypto & Web3Consumer & Retail
- Location
- London, England
- Typical check
- $250K
- Past investments
- 24
Notable investments
Abacum
Beep Networks
Nabis
Airseed
ZeroCater
DoseDr
ForeVRBueno FinancePopl
StarStock
BooktropeThe Ticket FairyHow to reach Justin Marcus
Angels and operators like Justin Marcus reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.
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About this profile
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Cite this page
Round Funded. "Justin Marcus." Round Funded investor database, updated September 23, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/justin-marcus
Frequently Asked Questions
What does Justin Marcus invest in?
Justin Marcus invests in Fintech, WealthTech, Healthcare & Biotech and Digital Health & HealthTech, typically at Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Justin Marcus invest at?
Justin Marcus typically invests at Seed. Lead with traction that fits the stage when you reach out.
What is Justin Marcus's typical check size?
Justin Marcus typically writes checks around $250K. 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.