Quest Resource Holding Acquires RWS Facility Services from Atar Capital

Atar Capital (via RWS) Acquires Sustainable Solutions Group (SSG)

April 15, 2019

Environmental Services

Atar Capital has acquired Sustainable Solutions Group (SSG) through its portfolio company Recycling and Waste Solutions (RWS). The add-on acquisition combines SSG’s commercial recycling and sustainability programs with RWS’s managed recycling and waste services to expand capabilities, scale and national account coverage; financial terms were not disclosed.

Ridgewood Infrastructure Acquires Waste Resources Management (WRM)

January 9, 2024

Environmental Services

Ridgewood Infrastructure LLC has acquired Waste Resources Management (WRM), a Houston-based provider of liquids and wastewater collection, treatment and disposal services that operates 13 treatment facilities across the U.S. Ridgewood said the acquisition expands its water-sector platform and will support WRM’s growth and service offering enhancements as the firm scales the business.

TorQuest Partners Invests in Waste Solutions Canada

September 8, 2025

Environmental Services

TorQuest Partners has completed a growth investment in Waste Solutions Canada, a tech-enabled managed service provider for waste and recycling headquartered in London, Ontario. The company's co-founders retain substantial ownership and management will remain in place as TorQuest partners with the team to scale the platform organically and via add-on acquisitions.

Republic Services Acquires Shamrock Environmental from CenterOak Partners

February 24, 2025

Environmental Services

Republic Services, Inc. has acquired Shamrock Environmental, a vertically integrated industrial waste and wastewater services platform headquartered in Browns Summit, North Carolina. The seller was CenterOak Partners (CenterOak Equity Fund I), marking the final exit from Fund I; financial terms were not disclosed.

Champion Painting Specialty Services Corp. Acquires WRS Environmental Services, Inc.

January 25, 2023

Environmental Services

Champion Painting Specialty Services Corp. (CPSSC) has acquired WRS Environmental Services, Inc. The purchase expands CPSSC’s environmental, industrial and utility capabilities—notably in nuclear plant decommissioning, demolition, infrastructure and power delivery services—and combines complementary teams and equipment to better serve public and private sector customers.

Northstar Recycling Acquires Waste Technology Services

October 14, 2025

Environmental Services

Northstar Recycling Company, LLC has acquired Waste Technology Services, LLC, combining two asset-light providers of managed waste, byproduct management and environmental consulting to strengthen technical capabilities and expand sustainability-oriented services. WTS, founded in 1982 and headquartered in Lewiston, New York, will join Northstar's platform (PE-backed after a 2021 recapitalization led by Ridgemont Equity Partners) to deliver broader recycling, reuse and reclamation solutions across specialty chemical, pharmaceutical, high-technology and industrial end markets.