3i-backed EC Waste Acquires ARB Inc. in Puerto Rico

Action Carting / Interstate Waste Services Acquires Multiple NYC Waste Operators

November 13, 2025

Environmental Services

Action Carting Environmental Services, a subsidiary of Interstate Waste Services, announced the acquisition and asset purchases of several New York City waste and recycling operators — Diverse Recycling Solutions, Full Circle Recycling Services, and select assets of Evergreen Waste Corp. and City Waste Services — to strengthen its capabilities ahead of the city’s Commercial Waste Zone (CWZ) rollout. All acquired operations will be integrated under the Action brand to expand service capacity and preserve long-standing neighborhood operators.

Arcwood Environmental Acquires ERG Environmental

October 7, 2025

Environmental Services

Arcwood Environmental, a national environmental and waste management services provider headquartered in Indianapolis, has acquired ERG Environmental, a Michigan-based hazardous waste and remediation services firm. The deal strengthens Arcwood's operational footprint across the Great Lakes (Michigan, Indiana, Ohio) and expands its capabilities in industrial environmental services, compliance support, and emergency response.

3i Group plc Acquires EC Waste, LLC from Post Capital Partners

November 30, 2021

Environmental Services

3i Group plc has acquired EC Waste, LLC, a leading non-hazardous solid waste services provider in Puerto Rico, from Post Capital Partners. EC Waste serves over 100,000 residential and more than 8,500 commercial and industrial customers, operates multiple landfill sites and transfer stations, employs over 350 people, and hosts a large renewable natural gas project; financial terms were not disclosed.

Ardurra Group Acquires Infrastructure Engineering Corporation (IEC)

May 11, 2021

Engineering Services

Ardurra Group, Inc., a portfolio company of RTC Partners, has acquired and merged with Infrastructure Engineering Corporation (IEC), a San Diego-based water, wastewater and public works engineering and construction management firm. IEC will operate as IEC, an Ardurra Group Company from its six California offices; the deal closed in early May 2021 and terms were not disclosed.

EC Waste Acquires Republic Services of Puerto Rico

September 1, 2020

Environmental Services

EC Waste, LLC, a Post Capital Partners portfolio company, acquired Republic Services of Puerto Rico (a subsidiary of Republic Services, Inc.) effective September 1, 2020. The deal — terms undisclosed and financed by Banco Popular de Puerto Rico — adds two landfills, a transfer station and two hauling operations, expanding EC Waste's footprint to operate four landfills, three transfer stations and four hauling operations across Puerto Rico.

Arcapita Acquires Waste Harmonics

January 13, 2020

Environmental Services

Arcapita, a global investment firm, acquired a controlling interest in Waste Harmonics, a technology-enabled, asset-light managed waste services provider headquartered in Victor, New York. The purchase—completed from Prospect Partners (in partnership with management and co-investor Expedition Capital Partners)—positions Arcapita to expand Waste Harmonics' suite of services and nationwide blue-chip customer base across North America.