Waste Management, Inc., through its subsidiaries, engages in the provision of environmental solutions to residential, commercial, industrial, and municipal customers in the United States and Canada. It offers collection services, including picking up and transporting waste and recyclable materials from where it was generated to a transfer station, material recovery facility (MRF), or disposal site; and owns and operates transfer stations, as well as owns, develops, and operates landfill facilities that produce landfill gas used as renewable natural gas for generating electricity. As of December 31, 2022, the company owned or operated 254 solid waste landfills, five secure hazardous waste landfills, 97 MRFs, and 337 transfer stations. It also provides materials processing and commodities recycling services at its MRFs, where cardboard, paper, glass, metals, plastics, construction and demolition materials, and other recycling commodities are recovered for resale or redirected for other purposes; recycling brokerage services, such as managing the marketing of recyclable materials for third parties; and other strategic business solutions. In addition, the company offers construction and remediation services; services related with the disposal of fly ash, and residue generated from the combustion of coal and other fuel stocks; in-plant services comprising full-service waste management solutions and consulting services; and specialized disposal services for oil and gas exploration and production operations. The company was formerly known as USA Waste Services, Inc. and changed its name to Waste Management, Inc. in 1998. Waste Management, Inc. was incorporated in 1987 and is headquartered in Houston, Texas.

Republic Services, Inc., together with its subsidiaries, offers environmental services in the United States and Canada. It is involved in the collection and processing of recyclable, solid waste, and industrial waste materials; transportation and disposal of non-hazardous and hazardous waste streams; and other environmental solutions. Its residential collection services include curbside collection of material for transport to transfer stations, landfills, recycling centers, and organics processing facilities; supply of recycling and waste containers; and renting of compactors. The company also engages in the processing and sale of old corrugated containers, old newsprint, aluminum, glass, and other materials; and provision of landfill services. It serves small-container, large-container, and residential customers. The company was incorporated in 1996 and is based in Phoenix, Arizona.

Waste Connections, Inc. provides non-hazardous waste collection, transfer, disposal, and resource recovery services in the United States and Canada. It offers collection services to residential, commercial, municipal, industrial, and exploration and production (E&P) customers; landfill disposal services; and recycling services for various recyclable materials, including compost, cardboard, mixed paper, plastic containers, glass bottles, and ferrous and aluminum metals. The company owns and operates transfer stations that receive compact and/or load waste to be transported to landfills or treatment facilities through truck, rail, or barge; and intermodal services for the rail haul movement of cargo and solid waste containers in the Pacific Northwest through a network of intermodal facilities. In addition, it provides E&P waste treatment, recovery, and disposal services for waste resulting from oil and natural gas exploration and production activity, such as drilling fluids, drill cuttings, completion fluids, and flowback water; production wastes and produced water during a well's operating life; contaminated soils that require treatment during site reclamation; and substances, which require clean-up after a spill, reserve pit clean-up, or pipeline rupture. Further, the company offers leasing services to its customers. Waste Connections, Inc. was founded in 1997 and is based in Woodbridge, Canada.

GFL Environmental Inc. offers non-hazardous solid waste management and environmental services in Canada and the United States. It offers solid waste management, liquid waste management, and soil remediation services, including collection, transportation, transfer, recycling, and disposal services for municipal, residential, and commercial, and industrial customers. The company was incorporated in 2007 and is headquartered in Vaughan, Canada.

Summit Materials, Inc. operates as a vertically integrated construction materials company in the United States and Canada. It operates in three segments: West, East, and Cement. The company offers aggregates, cement, ready-mix concrete, asphalt paving mixes, and concrete products, as well as plastics components. It also provides asphalt paving and related services. In addition, the company operates municipal waste, construction, and demolition debris landfills; and liquid asphalt terminals. The company serves the public infrastructure, and residential and nonresidential end markets. Summit Materials, Inc. was founded in 2009 and is headquartered in Denver, Colorado.

Stericycle, Inc., together with its subsidiaries, provides regulated waste and compliance services in the United States, Europe, and internationally. The company offers regulated waste and compliance services, including regulated medical waste, sharps waste management and disposal, pharmaceutical waste management and disposal, chemotherapy waste and disposal, controlled substance waste disposal, healthcare hazardous waste, and integrated waste stream solutions; specialty services, such as MedDrop medication collection kiosks, safe community solutions, SafeDrop sharps mailback solutions, and airport and maritime waste services; medical supply store services, that includes sharps and disposable biohazardous waste containers, infection control supplies, and seal&send medication mail back; and compliance solutions including Steri-Safe compliance solutions. It also provides secure information destruction services, including document, hard drive, destruction services under the Shred-it brand. The company serves healthcare businesses, including hospitals, health systems, non-affiliate hospitals, national and corporate healthcare, physician offices, surgery centers, veterinary and dental clinics, nursing and long-term care facilities, clinics and urgent care, dialysis centers, pharmacy, lab, research centers, home health organizations, etc.; and airports and seaports, education institutions, funeral homes and crematories, government and military, banks and professional services, and other businesses. Stericycle, Inc. was incorporated in 1989 and is headquartered in Bannockburn, Illinois. As of November 4, 2024, Stericycle, Inc. operates as a subsidiary of Waste Management, Inc.

Quest Resource Holding Corporation, together with its subsidiaries, provides solutions for the reuse, recycling, and disposal of various waste streams and recyclables in the United States. The company provides disposal and recycling services for motor oil and automotive lubricants, oil filters, scrap tires, oily water, goods destruction, food waste, meat renderings, cooking oil and grease trap waste, plastics, cardboard, metal, glass, mixed paper, construction debris, as well as a large variety of regulated and non-regulated solid, liquid, and gas wastes. It offers antifreeze and windshield washer fluid, dumpster and compacting equipment, and other minor ancillary services. In addition, the company offers landfill diversion services. Its services focus on the waste streams and recyclables from big box, grocers, and other retailers; automotive maintenance, quick lube, dealerships, and collision repair; transportation, logistics, and internal fleet operators; manufacturing plants; multi-family and commercial properties; restaurant chains and food operations; and construction and demolition projects. The company markets its services to automotive, manufacturing, hospitality and retail, construction and demolition, and commercial and multi-family property management industries through direct sales force and strategic partnerships. The company was formerly known as Infinity Resources Holdings Corp. and changed its name to Quest Resource Holding Corporation in October 2013. Quest Resource Holding Corporation is headquartered in The Colony, Texas.

Avalon Holdings Corporation provides waste management services to industrial, commercial, municipal, and governmental customers in the United States. It operates in Waste Management Services, and Golf and Related Operations segments. The Waste Management Services segment offers hazardous and nonhazardous waste disposal brokerage and management services; captive landfill management services; and turnkey services, including daily operations, facilities management, and management reporting. This segment also engages in the salt water injection well operations; and sale of construction mats. The Golf and Related Operations segment is involved in operation and management of golf courses and related clubhouses and facilities; and a hotel and its associated resort amenities, as well as an athletic center. Its golf and country club facilities offer swimming pools, fitness centers, tennis courts, dining and banquet, conference facilities, salon, and spa services. The company also owns and operates hotel under the brand of The Grand Resort. Avalon Holdings Corporation was incorporated in 1998 and is headquartered in Warren, Ohio.