Alex Mace – Startup Investor Profile

Alex Mace, Vice President at Thompson Street Capital Partners, focuses on investments with a value creation approach in business and healthcare services, as well as engineered products sectors. The firm’s investment thesis emphasizes the importance of ESG factors. Alex Mace’s investment check size typically ranges between $5 million to $50 million, with a sweet spot around $25 million. Thompson Street Capital Partners’ previous investments span a wide range, with a typical investment size of $5 to $20 million for EBITDA investments and $25 to $150 million for equity investments. Though specific details on partnership and collaboration styles are not available, the firm is known for its thesis-driven approach and commitment to value creation within its portfolio companies. Alex Mace and Thompson Street Capital Partners maintain a track record of successful investments in line with their strategic focus areas.

Location: St. Louis, Missouri

Country: United States of America

Investment Regions: EU, NA, OC

Investment Stages: pre-seed, seed

Website: https://www.tscp.com/people/alex-mace/

AI Reasoning: I found Alex Mace listed on Thompson Street Capital Partners team page and located firm press/news showing recent investments in 2025 involving Thompson Street portfolio companies. The most recent investment I found associated with Thompson Street was in 2025 (investment in Martin Jetco Heating and Air Conditioning Inc. noted in a September 2025 mention). The investment date is within the last 6 months from the reference date, indicating activity less than 6 months ago. The startup mentioned was Martin Jetco Heating and Air Conditioning Inc.

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.