Stonepeak Completes Acquisition of Air Transport Services Group (ATSG)

Blackstone Infrastructure Acquires 22% Minority Stake in AGS Airports

March 28, 2025

Transportation

Blackstone's infrastructure strategy for individual investors agreed to acquire a 22% minority stake in AGS Airports from AviAlliance for £235 million to support continued growth of UK travel and tourism. AviAlliance remains the majority shareholder with a 78% stake; the investment is intended to fund capital improvements and traffic growth across AGS's three UK airports (Glasgow, Aberdeen and Southampton).

Alliance Ground International Acquires Airport Terminal Services

September 12, 2022

Logistics & Distribution

Alliance Ground International (AGI) has acquired Airport Terminal Services (ATS), adding 49 locations across the United States and Canada and marking AGI's first entry into passenger/terminal operations. ATS, founded in 1975 and based in St. Louis, Missouri, has more than 5,500 employees and provides full-range ground handling, cargo handling, refuelling, de-icing and lounge/concierge services.

ATSG Combines with Evolve IP to Create a Scaled IT Managed Services Provider

October 31, 2024

IT Services

ATSG, a RunTide Capital-backed managed services platform, has completed a combination with Evolve IP, with ATSG retaining a controlling majority. Investment funds managed by Morgan Stanley Private Equity Secondaries, through a vehicle managed by RunTide Capital, provided equity financing for the transaction; the combined company will have more than $230 million in revenue and serve approximately 1,700 customers and 950,000 end-users.

ATSG Acquires MTM Technologies, Inc.

December 17, 2020

IT Services

ATSG, a PE‑backed tech‑enabled managed services and solutions company, has acquired MTM Technologies, Inc., an IT managed services provider with deep Cisco and Citrix partnerships. The acquisition expands ATSG’s national footprint and technical capabilities across datacenter, endpoint, network, and cybersecurity infrastructure, and bolsters its rediManage/rediTech/rediCloud/rediSecure offerings.

H.I.G. Capital Acquires STS Aviation Group from Greenbriar Equity Group

October 8, 2024

Aerospace & Defense

An affiliate of H.I.G. Capital has completed a strategic equity acquisition of STS Aviation Group from Greenbriar Equity Group. STS’s executive team will remain in place and as significant shareholders while H.I.G. positions the business for global expansion, capability growth, and potential add-on acquisitions in the aviation MRO and parts-distribution market.

STS Aviation Group Acquires Airbase Services, Inc.

January 6, 2020

Transportation

STS Aviation Group acquired Airbase Services, Inc., an aircraft interiors maintenance, repair and management specialist based in Montreal, Quebec. The acquisition gives STS immediate entry into the Canadian MRO market through Airbase’s four Transport Canada–approved facilities (YUL, YYZ, YWG, YVR); terms were not disclosed and Airbase’s acting president Lena Watters will remain on as President.