Arena Investors Acquires FST Technical Services from Caymus Equity

FST Technical Services Acquires Criterion Labs

March 24, 2025

Industrial Services

FST Technical Services, a Phoenix/Chandler-based provider of testing, inspection, certification and commissioning services, has acquired Criterion Labs, Inc., a specialist in gas-line and laboratory testing. The acquisition expands FST's testing capabilities and geographic reach while strengthening its position serving semiconductor, technology and life-sciences customers.

Forensic Access Group Acquires Forensic Testing Service (FTS)

October 27, 2023

Healthcare Services

Forensic Access Group, a portfolio company of Limerston Capital, has acquired FTS (Forensic Testing Service), a West Yorkshire–based toxicology testing provider focused on family law and childcare proceedings. The transaction is the fifth bolt-on to Forensic Access’s platform and is intended to expand toxicology capacity, capabilities and diversify the group’s client base.

Full Spectrum Group Acquires Cascade Thermal Solutions

March 24, 2021

Healthcare Services

Pfingsten-backed Full Spectrum Group (FSG) has acquired Cascade Thermal Solutions, Inc., a provider of repair and maintenance services for refrigeration, sterilization, incubation and thermal laboratory equipment. The add-on deal, which closed March 12, 2021, expands FSG's service capabilities (refrigeration and environmental rooms) and accelerates Cascade's access to a national footprint.

Technical Safety Services Acquires Atlantic Technical Systems, Inc.

March 5, 2020

Healthcare Services

Technical Safety Services, LLC (TSS), operating under Technical Solutions Holdings, Inc., has acquired Atlantic Technical Systems, Inc. (ATS), a cleanroom testing and certification services business based in Annapolis, Maryland. The acquisition expands TSS/TSH’s service capabilities and strengthens its national footprint in the northeastern United States, while ATS customers will gain access to a broader suite of testing, certification and calibration services.

Caymus Equity Partners Acquires Quality Environmental Services

November 15, 2023

Environmental Services

Caymus Equity Partners LLC has acquired Quality Environmental Services, LLC, a Beaverton, Michigan–based provider of environmental remediation services. The investment — Caymus Equity's third from Fund II and fifteenth platform investment overall — will provide capital to expand Quality's service offerings, enter new geographies and verticals, and pursue strategic acquisitions.

Full Spectrum Group Acquires Analytical Maintenance Services

April 14, 2021

Industrial Services

Full Spectrum Group, a portfolio company of Pfingsten, has acquired Analytical Maintenance Services (AMS), a Boca Raton-based provider of analytical laboratory instrumentation repair, qualification and validation services. The add-on acquisition, which closed March 23, 2021, expands FSG's service coverage in the Southeast and strengthens its presence in the pharmaceutical market.