Brian Kornmann – Startup Investor Profile

Brian Kornmann is the Managing Director at Thompson Street Capital Partners, a private equity firm based in St. Louis, Missouri. The firm focuses on investing in companies operating in healthcare, business & consumer services, engineered products, life sciences, data, and software & technology sectors. Thompson Street Capital Partners typically invests in mid to large-size companies with more than $50 million in revenue. Their geographical preference includes the East, Midwest, South, and West regions of the United States, along with Canada. Previous investments by Thompson Street Capital Partners include companies like BCM One, Flowroute, and Pure IP. Brian Kornmann’s professional career includes roles at PricewaterhouseCoopers, BRK Consulting, and Mikunda, Cottrell & Company. The firm’s investment check size ranges between $5 to $20 million for EBITDA investments and $25 to $150 million for equity investments. Partnership and collaboration styles at Thompson Street Capital Partners involve working with companies in various sectors such as business services, managed services, healthcare, and technology.

Location: St. Louis, Missouri

Country: United States of America

Investment Regions: EU, OC

Investment Stages: pre-seed, seed

Website: https://www.tscp.com/people/brian-kornmann/

AI Reasoning: I found a Thompson Street Capital Partners acquisition (Bubbakoo’s Burritos) announced June 18, 2025 where Thompson Street was the buyer; Brian Kornmann is a Managing Director at TSCP and is involved in firm investments. The most recent identified investment connected to TSCP is June 18, 2025 (Bubbakoo’s Burritos), which is less than 6 months prior to the reference date, so classify as very-active.

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.