David Castle
Angel investor in London
London, England
David Castle, Angel investor in London is an active investor based in London, England. This profile covers what David Castle backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelInvestment PartnerInvestment Bank
- Stages
- Seed
- Invests in
- FintechSaaS & EnterpriseDeveloper Tools & DataCybersecurityLegalTech
- Location
- London, England
- Typical check
- $250K
- Past investments
- 11
Notable investments
SimudyneWaltham Partners Ltd
Polly PortfolioBPX Digital Securities ExchangeBarac
PushforFlatzapp Ltd
Midatech PharmaWaltham Analytics
Standard Chartered BankCastle Oak LTDHow to reach David Castle
Angels and operators like David Castle 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. "David Castle." Round Funded investor database, updated September 8, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/david-castle
Frequently Asked Questions
What does David Castle invest in?
David Castle invests in Fintech, SaaS & Enterprise, Developer Tools & Data and Cybersecurity, typically at Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does David Castle invest at?
David Castle typically invests at Seed. Lead with traction that fits the stage when you reach out.
What is David Castle's typical check size?
David Castle 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.