KM
About
Karl Mattson is based out of Minneapolis-St. Paul Area, Minnesota and is the Founder and Manging Director of Squared Circle Ventures. Karl previously worked at Aim Security as an Angel Investor. Karl Mattson attended Boston University.
Position in the VCSift Database
- • 160 investors hold the Founder & Managing Director role in VCSift. Karl Mattson is one of them.
- • 365 investors are based in Minneapolis, Minnesota, United States.
Data sourced from 410,343 investor profiles. Updated July 2026.
Investment Focus
- Location
- Minneapolis, US
Contact Information
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