Thompson Street Capital Partners (TSCP), a private equity firm based in St. Louis, today announced the acquisition of Buckley Belcher & Company, LLC (Buckley Belcher) by ATIS, a TSCP portfolio company and premier provider of elevator and escalator safety inspections, consulting, and managed services across North America.
Buckley Belcher is a provider of elevator consulting and managed services to building owners, property managers, and architects across the United States. With this addition, ATIS further strengthens its consulting and managed services capabilities, expanding its ability to support clients throughout the full lifecycle of their vertical transportation assets. Terms of the transaction were not disclosed.
About ATIS
ATIS (www.atis.com) is one of North America’s largest providers of vertical transportation inspections, consulting, and managed services. With a team of over 200 licensed QEI professionals and expert consultants, ATIS provides unparalleled service across the US and Canada to more than 15,000 customers, promoting the safety and performance of nearly 100,000 elevators and escalators. Renowned for its commitment to excellence and innovation, ATIS provides safety inspections and expert consulting services for a wide range of projects across all sectors, including new construction, modernization, and asset management, while also offering fully managed elevator solutions that include maintenance management and certificate management.
About Thompson Street Capital Partners
Thompson Street Capital Partners (tscp.com) is a St. Louis-based private equity firm focused on investing in founder-owned middle market businesses in the life sciences and healthcare, software and technology, business and consumer services and products sectors. Founded in 2000, the firm has acquired more than 250 companies and had assets under management of over $4.5 billion as of March 31, 2026. TSCP partners with management teams to increase value by accelerating growth, both organically and via complementary acquisitions.
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