General Info
John Crosson is a successful entrepreneur and angel investor. He leads MainStreet Investment Advisors, focusing on equity, asset allocation strategies, and environmental, social & governance issues. His investments vary from the seed stage to Series B. John’s collaboration style is highly impactful and results-driven. He actively mentors at DePaul University and other institutions, nurturing start-ups and fostering early-stage funding. With extensive experience in finance and startups, he emphasizes nurturing the entrepreneurial ecosystem for business launches and success. John’s check sizes range accordingly to cater to different stages of startup growth.
Location: Chicago, Illinois, United States
Country: United States of America
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Investment Regions:
Investment Stages: pre-seed, seed
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🤖 AI Activity Report
Status: not-found
AI Reasoning: Searches of MainStreet Advisors, Chicago ArchAngels, Crunchbase, LinkedIn and related pages found only background info and an old Crunchbase funding item dated 2003 for Main Street Advisors. No verifiable recent investments (within past several years) or any investments in 2024-2025 were found. The only identified investment referenced was Main Street Advisors (seed/early round) with an announced date in 2003. Given absence of any recent investment activity, classify as not-found.
Angel activity thresholds:
Low Activity – Only known angel investments more than 12 months ago.
Active – Known angel investments between the last 12 and 6 months.
Very Active – Known angel investments in the last 6 months.
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