In September 2024, Thompson Street Capital Partners (TSCP), a St. Louis private equity firm, made a growth investment in ATIS, the elevator and escalator inspection, consulting and managed services company founded by the Greenleaf team in 2012. Greenleaf retains an interest in ATIS.
Since partnering with TSCP, ATIS has continued to grow through acquisition:
March 31, 2026: KJA, an ATIS subsidiary, acquired Vinspec, expanding in Alberta.
August 5, 2026: ATIS acquired Buckley Belcher & Company, strengthening its consulting and managed services capabilities.
August 24, 2026: ATIS acquired AuditMate, an elevator asset management technology platform. “The acquisition of AuditMate represents another important step in ATIS’ long-term strategy of building the leading technology-enabled platform across elevator managed services, consulting, and inspection,” said Tom St. Geme, Managing Director at TSCP.
ATIS serves more than 15,000 clients and nearly 100,000 elevators and escalators across the US and Canada with more than 250 inspectors and consultants.
Read more: TSCP growth investment in ATIS | AuditMate acquisition announcement