ATIS Acquires Bayline Lift Technologies

Thompson Street Capital Partners Invests in ATIS

September 25, 2024

Engineering Services

Thompson Street Capital Partners (TSCP) has made a growth investment in ATIS, a St. Louis–headquartered provider of elevator and escalator safety inspections, consulting, and managed services. Terms were not disclosed; TSCP said the capital will support expansion of ATIS’ service offerings, sales and marketing, geographic growth, and strategic add-on acquisitions.

ATIS (Thompson Street-backed) Acquires Technical Inspection Agency USA (TIA USA)

September 15, 2025

Professional Services

ATIS, a St. Louis-based provider of elevator and escalator inspections and consulting (backed by Thompson Street Capital Partners), has acquired Technical Inspection Agency USA (TIA USA), a Las Vegas–headquartered provider of vertical transportation inspections and consulting serving Nevada and Arizona. The deal expands ATIS’ national footprint and technical capabilities in complex vertical transportation systems; terms were not disclosed.

ATIS Acquires M.A.N Elevator Inspections

January 1, 2025

Engineering Services

ATIS, a portfolio company of Thompson Street Capital Partners (TSCP), has acquired M.A.N Elevator Inspections, a Florida-based provider of elevator inspection services. The deal expands ATIS's footprint and inspection capacity across southeastern (and western) Florida; terms were not disclosed.

ATIS Acquires Vermont Elevator Inspection Services (VEIS)

November 13, 2024

Engineering Services

ATIS, a portfolio company of Thompson Street Capital Partners (TSCP), has acquired Vermont Elevator Inspection Services (VEIS). The add-on expands ATIS' geographic footprint into Vermont and strengthens its local inspection and regulatory compliance capabilities; terms were not disclosed.

Vantage Elevator Solutions Acquires BSIS

October 13, 2025

Industrial Services

Vantage Elevator Solutions, headquartered in Bronx, New York, has acquired BSIS, a New York–based installer of passenger and freight door systems, cabs, cab remodeling, platforms and emergency repairs. The acquisition will integrate BSIS' field and technical services into Vantage's portfolio (alongside Freight Tech) to expand capability and deliver more comprehensive field support and manufacturing services to customers.

Chesapeake Technology International (CTI) Acquires Asymmetric Technologies LLC

April 1, 2024

Aerospace & Defense

Chesapeake Technology International, a portfolio company of Bluestone Investment Partners, has acquired Asymmetric Technologies LLC to expand CTI’s product portfolio with Asymmetric’s IronClad and Whisper solutions. The add-on acquisition strengthens CTI’s capabilities in flight autonomy, edge communications, and NDAA-compliant hardware/software for Department of Defense and national security customers.