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.

Cardinal Health, Inc. operates as a healthcare services and products company in the United States, Canada, Europe, Asia, and internationally. It provides customized solutions for hospitals, healthcare systems, pharmacies, ambulatory surgery centers, clinical laboratories, physician offices, and patients in the home. The company operates in two segments: Pharmaceutical and Specialty Solutions, and Global Medical Products and Distribution. It distributes branded and generic pharmaceutical, specialty pharmaceutical, and over-the-counter healthcare and consumer products, as well as medical supplies. The company also provides services to pharmaceutical manufacturers and healthcare providers for specialty pharmaceutical products; offers pharmacy management services to hospitals; operates pharmacies, including pharmacies in community health centers; and repackages generic pharmaceuticals and over-the-counter healthcare products. In addition, it manufactures, sources, and distributes Cardinal Health branded medical, surgical, and laboratory products and devices that include exam and surgical gloves; needles, syringe, and sharps disposals; compression solution, incontinence, nutritional delivery, and wound care products; single-use surgical drapes, gowns, and apparel products; fluid suction and collection systems; urology products; operating room supply products; and electrode product lines. Further, the company distributes a range of national brand products, including medical, surgical, and laboratory products; provides supply chain services and solutions to hospitals, ambulatory surgery centers, clinical laboratories, and other healthcare providers; and assembles and sells sterile, and non-sterile procedure kits. Additionally, it manufactures, prepares, delivers, and distributes radiopharmaceuticals and related treatments; and optimizes direct shipments through integrated technology solutions. The company was incorporated in 1979 and is headquartered in Dublin, Ohio.

STERIS plc provides infection prevention products and services worldwide. It operates through three segments: Healthcare, Applied Sterilization Technologies (AST), and Life Sciences. The Healthcare segment offers cleaning chemistries and sterility assurance products; automated endoscope reprocessing system and tracking products; endoscopy accessories, washers, sterilizers, and other pieces of capital equipment for the operation of a sterile processing department; and equipment used directly in surgical tables, lights, and connectivity solutions, as well as equipment management services. It also provides capital equipment installation, maintenance, upgradation, repair, and troubleshooting services; preventive maintenance programs and repair services; instrument, devices, and endoscope repair and maintenance services; and custom process improvement consulting and outsourced instrument sterile processing services. The AST segment provides contract sterilization and testing services for medical device and pharmaceutical manufacturers through a network of contract sterilization and laboratory facilities, as well as integrated sterilization equipment and control systems to medical device manufacturers and research institutions. The Life Sciences segment designs, manufactures, and sells consumable products, such as pharmaceutical detergents, cleanroom disinfectants and sterilants, pharmaceutical grade and research sterilizers and washers, sterility assurance and maintenance products, vaporized hydrogen peroxide room decontamination systems and sterilizers, and high purity water and pure steam generators. This segment also offers equipment installation, maintenance, upgradation, repair, and troubleshooting services; and preventive maintenance programs and repair services. It serves its products and services to hospitals, other healthcare providers, and pharmaceutical manufacturers. The company was founded in 1985 and is headquartered in Mentor, Ohio.

Baxter International Inc., through its subsidiaries, develops and provides a portfolio of healthcare products worldwide. The company operates through four segments: Medical Products and Therapies, Healthcare Systems and Technologies, Pharmaceuticals, and Kidney Care. The company offers sterile intravenous (IV) solutions; infusion systems and devices; parenteral nutrition therapies; generic injectable pharmaceuticals; surgical hemostat and sealant products, advanced surgical equipment; smart bed systems; patient monitoring and diagnostic technologies; and respiratory health devices, as well as advanced equipment for the surgical space, including surgical video technologies, precision positioning devices, and other accessories. It also provides administrative sets; adhesion prevention products; inhaled anesthesia; drug compounding; chronic and acute dialysis therapies and services, including peritoneal dialysis (PD), hemodialysis (HD), continuous renal replacement therapies (CRRT), and other organ support therapies. The company's products are used in hospitals, kidney dialysis centers, nursing homes, rehabilitation centers, ambulatory surgery centers, doctors' offices, and patients at home under physician supervision. The company sells its products through direct sales force, as well as through independent distributors, drug wholesalers, and specialty pharmacy or other alternate site providers in approximately 100 countries. It has an agreement with Celerity Pharmaceutical, LLC to develop acute care generic injectable premix and oncolytic products; and a collaborative research agreement with Miromatrix Medical Inc. aiming to advance care for patients with acute liver failure. Baxter International Inc. was incorporated in 1931 and is headquartered in Deerfield, Illinois.

Clean Harbors, Inc. provides environmental and industrial services in the United States and internationally. The company operates through two segments, Environmental Services and Safety-Kleen Sustainability Solutions. The Environmental Services segment collects, transports, treats, and disposes hazardous and non-hazardous waste, such as resource recovery, physical treatment, fuel blending, incineration, landfill disposal, wastewater treatment, lab chemicals disposal, and explosives management services; and offers CleanPack services, including collection, identification, categorization, specialized packaging, transportation, and disposal of laboratory chemicals and household hazardous waste. This segment also provides industrial maintenance and specialty industrial services; and utilizes specialty equipment and resources that performs field services. The Safety-Kleen Sustainability Solutions segment provides pickup and transportation services for hazardous and non-hazardous containerized waste for recycling or disposal; machine cleaning and maintenance, and disposal and replenishment of clean solvent or aqueous fluids; and vacuum services to remove solids, residual oily water, and sludge and other fluids from customers' oil/water separators, sumps, and collection tanks, as well as removes and collects waste fluids found at large and small industrial locations, including metal fabricators, auto maintenance providers, and general manufacturers. This segment also manufactures, formulates, packages, distributes, and markets lubricants and other automotive products. Clean Harbors, Inc. was incorporated in 1980 and is headquartered in Norwell, Massachusetts.

Casella Waste Systems, Inc., together with its subsidiaries, operates as a vertically integrated solid waste services company in the United States. It offers resource management services primarily in the areas of solid waste collection and disposal, transfer, recycling, and organics services to residential, commercial, municipal, institutional, and industrial customers. The company provides non-hazardous solid waste services, including collections, transfer stations, recycling, and disposal operations. In addition, it markets materials, including fibers, corrugated cardboard, newsprint, plastics, glass, ferrous, and aluminum metals. Casella Waste Systems, Inc. was founded in 1975 and is headquartered in Rutland, Vermont.

Sotera Health Company engages in the provision of sterilization, lab testing, and advisory services in the United States and internationally. The company operates through three segments: Sterigenics, Nordion, and Nelson Labs. It provides mission-critical end-to-end sterilization services, including gamma and electron beam irradiation, and ethylene oxide processing, as well as designs, installs, and maintains gamma irradiation systems. The company also provides microbiological and analytical chemistry testing, as well as technical assistance, regulatory consulting, and advisory services. It serves medical devices, pharmaceuticals, food safety, agricultural products, cancer treatment, and high-performance materials industries, as well as commercial, advanced, and specialty application industries. The company was formerly known as Sotera Health Topco, Inc. and changed its name to Sotera Health Company in October 2020. Sotera Health Company was incorporated in 2015 and is headquartered in Broadview Heights, Ohio.