Mark Williamson
Managing Partner at Calera Capital
Boston, Massachusetts
Mark Williamson, Managing Partner at Calera Capital is an active investor based in Boston, Massachusetts. This profile covers what Mark Williamson backs, at which stage, and how founders can reach out in 2026.
- Investor type
- AngelVCPE
- Stages
- Pre SeedSeed
- Invests in
- PropTech & Real EstateConsumer & RetailHealthcare & Biotech
- Location
- Boston, Massachusetts
- Typical check
- $150K
- Past investments
- 7
Notable investments
LoopNet
SpoolHarvard Management CompanyTule
Patients Know BestRock-It CargoSleepy'sHow to reach Mark Williamson
Angels and operators like Mark Williamson 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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Cite this page
Round Funded. "Mark Williamson." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/mark-williamson
Frequently Asked Questions
What does Mark Williamson invest in?
Mark Williamson invests in PropTech & Real Estate, Consumer & Retail and Healthcare & Biotech, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does Mark Williamson invest at?
Mark Williamson typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is Mark Williamson's typical check size?
Mark Williamson typically writes checks around $150K. 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.