John Rex
Angel investor in Wellesley
Wellesley, Massachusetts
John Rex, Angel investor in Wellesley is an active investor based in Wellesley, Massachusetts. This profile covers what John Rex backs, at which stage, and how founders can reach out in 2026.
- Investor type
- Angel
- Stages
- Pre SeedSeed
- Invests in
- Healthcare & BiotechBiotech & Pharma
- Location
- Wellesley, Massachusetts
- Typical check
- $150K
- Past investments
- 3
Notable investments
How to reach John Rex
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About this profile
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Cite this page
Round Funded. "John Rex." Round Funded investor database, updated September 9, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/john-rex
Frequently Asked Questions
What does John Rex invest in?
John Rex invests in Healthcare & Biotech and Biotech & Pharma, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.
What stage does John Rex invest at?
John Rex typically invests at Pre Seed and Seed. Lead with traction that fits the stage when you reach out.
What is John Rex's typical check size?
John Rex 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.