William Bubenicek
Angel investor in Boston
Boston, Massachusetts
William Bubenicek, Angel investor in Boston is an active investor based in Boston, Massachusetts. This profile covers what William Bubenicek backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelPEInvestment Partner
- Stages
- Pre SeedSeedSeries ASeries BLate Stage Venture
- Invests in
- Manufacturing & IndustrialClimate & EnergySaaS & Enterprise
- Location
- Boston, Massachusetts
- Typical check
- $1M
- Past investments
- 9
Notable investments
Ecovent SystemsCambridge Clean Energy Ltd. (CCE)WAB DevelopmentBoardmyBizcomConnectMCambridge Clean EnergyHow to reach William Bubenicek
Angels and operators like William Bubenicek 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. "William Bubenicek." Round Funded investor database, updated September 23, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/william-a-bubenicek
Frequently Asked Questions
What does William Bubenicek invest in?
William Bubenicek invests in Manufacturing & Industrial, Climate & Energy and SaaS & Enterprise, 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 William Bubenicek invest at?
William Bubenicek typically invests at Pre Seed, Seed, Series A and Series B. Lead with traction that fits the stage when you reach out.
What is William Bubenicek's typical check size?
William Bubenicek typically writes checks around $1M. 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.