Griffin Weiler, Principal at Jamster Capital LLC is an active investor based in Boston, Massachusetts. This profile covers what Griffin Weiler backs, at which stage, and how founders can reach out in 2026.
Principal at Jamster Capital LLC with a background in M&A and capital transactions across debt, equity, and intellectual property.
Griffin Weiler typically invests at Series B and Late Stage Venture.
- Investor type
- PE
- Stages
- Series BLate Stage Venture
- Location
- Boston, Massachusetts
- Typical check
- $5M
How to reach Griffin Weiler
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Round Funded. "Griffin Weiler." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/griffin-weiler
Frequently Asked Questions
Who is Griffin Weiler?
Griffin Weiler, Principal at Jamster Capital LLC is an active investor based in Boston, Massachusetts. Griffin Weiler typically invests at Series B and Late Stage Venture.
What stage does Griffin Weiler invest at?
Griffin Weiler typically invests at Series B and Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Griffin Weiler's typical check size?
Griffin Weiler typically writes checks around $5M. 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.