William McManners
Founder and Managing Partner at MD One Ventures
London, England
William McManners, Founder and Managing Partner at MD One Ventures is an active investor based in London, England. This profile covers what William McManners backs, at which stage, and how founders can reach out in 2026.
William McManners is the Founder and Managing Partner of MD One Ventures, Europe's first National Security VC.
William McManners invests in Cybersecurity and GovTech & Defense, typically at Seed and Series A.
- Investor type
- VC
- Stages
- SeedSeries A
- Invests in
- CybersecurityGovTech & Defense
- Location
- London, England
- Typical check
- $625K
How to reach William McManners
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Round Funded. "William McManners." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/william-mcmanners
Frequently Asked Questions
Who is William McManners?
William McManners, Founder and Managing Partner at MD One Ventures is an active investor based in London, England. William McManners invests in Cybersecurity and GovTech & Defense, typically at Seed and Series A.
What does William McManners invest in?
William McManners invests in Cybersecurity and GovTech & Defense, typically at Seed and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does William McManners invest at?
William McManners typically invests at Seed and Series A. Lead with traction that fits the stage when you reach out.
What is William McManners's typical check size?
William McManners typically writes checks around $625K. 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.