John Crosson
CEO/Founder at MainStreet Investment Advisors, LLC
Chicago, United States
John Crosson, CEO/Founder at MainStreet Investment Advisors, LLC is an active investor based in Chicago, United States. This profile covers what John Crosson backs, at which stage, and how founders can reach out in 2026.
John Crosson is an experienced entrepreneur and angel investor specializing in launching and growing financial startups and navigating complex transactions.
John Crosson invests in Fintech, typically at Seed, Series A and Early Stage Venture.
- Investor type
- AngelVC
- Stages
- SeedSeries AEarly Stage Venture
- Invests in
- Fintech
- Location
- Chicago, United States
- Typical check
- $500K
How to reach John Crosson
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About this profile
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Cite this page
Round Funded. "John Crosson." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/john-crosson
Frequently Asked Questions
Who is John Crosson?
John Crosson, CEO/Founder at MainStreet Investment Advisors, LLC is an active investor based in Chicago, United States. John Crosson invests in Fintech, typically at Seed, Series A and Early Stage Venture.
What does John Crosson invest in?
John Crosson invests in Fintech, typically at Seed, Series A and Early Stage Venture. Match your sector and stage, then reach out with a personalized pitch.
What stage does John Crosson invest at?
John Crosson typically invests at Seed, Series A and Early Stage Venture. Lead with traction that fits the stage when you reach out.
What is John Crosson's typical check size?
John Crosson typically writes checks around $500K. 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.