# Mercury Partners > Mercury Partners is a San Diego-based principal investment firm, founded in 1996 and led by Founding Partner Brad de Koning. It invests its own permanent capital in founder-owned business services and healthcare services companies in the United States. Mercury Partners is not a traditional private equity fund. It invests its own capital, has no fund life or forced exit timeline, and can own businesses indefinitely. Brad de Koning has been both a private equity investor and CEO of two lower middle market companies, most recently DirectMed Imaging, which Mercury acquired in 2017 and grew through organic initiatives and seven add-on acquisitions. ## Investment criteria - Revenue: $10 million to $50 million - EBITDA: $1 million to $4 million - Transaction size: $5 million to $50 million - Geography: United States - Ownership: founder-owned businesses - Transaction types: majority or control investments, founder transitions and recapitalizations, management buyouts, strategic add-on acquisitions - Business characteristics: critical services to complex or regulated end markets, technical expertise, high barriers to entry, recurring or non-discretionary demand, meaningful switching costs, fragmented competitive landscape ## Sectors - Business services: equipment maintenance and repair; testing, inspection, and calibration; facilities management; specialty field services; safety and compliance - Healthcare services: medical equipment maintenance and repair; healthcare equipment testing and calibration; medical products and distribution; healthcare facility support services; sterilization and infection control ## Representative investments DirectMed Imaging, LBN Medical, Medical Systems Tech, Richardson Healthcare, ScanMed, Technical Prospects, Titanium Medical Imaging, and one undisclosed diagnostic imaging parts provider. ## Pages - [Home](https://mercfund.com/): overview, approach, and how Mercury invests - [About](https://mercfund.com/about/): Brad de Koning and the full investment criteria - [For Founders](https://mercfund.com/founder-legacy/): what a sale or transition to Mercury looks like, the process, and founder FAQs - [Investments](https://mercfund.com/investments/): representative investments and industry focus - [Contact](https://mercfund.com/contact/): confidential inquiries from business owners and advisors ## Contact Mercury Partners, 12544 High Bluff Drive, Suite 200, San Diego, CA 92130 Phone: (858) 205-1405 Email: contact@mercfund.com