Jeff Altenburg, Principal at Amsource Capital is an active investor based in Ellicott City, Maryland. This profile covers what Jeff Altenburg backs, at which stage, and how founders can reach out in 2026.
Principal at Amsource Capital and professional race car driver with Jeff Altenburg Motorsports.
Jeff Altenburg typically invests at Late Stage Venture.
- Investor type
- PE
- Stages
- Late Stage Venture
- Location
- Ellicott City, Maryland
- Typical check
- $7M
How to reach Jeff Altenburg
Angels and operators like Jeff Altenburg 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. "Jeff Altenburg." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/jeff-altenburg
Frequently Asked Questions
Who is Jeff Altenburg?
Jeff Altenburg, Principal at Amsource Capital is an active investor based in Ellicott City, Maryland. Jeff Altenburg typically invests at Late Stage Venture.
What stage does Jeff Altenburg invest at?
Jeff Altenburg typically invests at Late Stage Venture. Lead with traction that fits the stage when you reach out.
What is Jeff Altenburg's typical check size?
Jeff Altenburg typically writes checks around $7M. 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.