W.W. Grainger, Inc. distributes maintenance, repair, and operating (MRO) products and services in the United States, Japan, Canada, the United Kingdom, and internationally.

DXP Enterprises, Inc., together with its subsidiaries, engages in distributing maintenance, repair, and operating (MRO) products, equipment, and services to the energy and industrial customers primarily in the United States and Canada.

SiteOne Landscape Supply, Inc. engages in the wholesale distribution of landscape supplies in the United States and Canada. The company provides a selection of approximately 135,000 stock keeping units, including irrigation supplies, which comprise controllers, valves, sprinkler heads, and irrigation pipes; fertilizer, grass seed, and ice melt products; control products, such as herbicides, fungicides, rodenticides, and other pesticides; landscape accessories that include mulches, soil amendments, drainage pipes, tools, and sods; nursery goods, which consist of deciduous and evergreen shrubs, ornamental, shade, evergreen trees, field grown and container-grown nursery stock, roses, perennials, annuals, bulbs, and plant species; hardscapes, such as pavers, natural stones, blocks, and other durable materials; and outdoor lighting products that include lighting fixtures, LED lamps, wires, transformers, and accessories.

Lawson Products, Inc. sells and distributes specialty products to the industrial, commercial, institutional, and government maintenance, repair, and operations market. It sells its products to customers in the United States, Puerto Rico, Canada, Mexico, and the Caribbean.

Global Industrial Company, through its subsidiaries, operates as a value-added industrial distributor of industrial and maintenance, repair, and operation (MRO) products in North America.

BlueLinx Holdings Inc., together with its subsidiaries, distributes residential and commercial building products in the United States. The company distributes specialty products comprising engineered wood, industrial products, cedar, moulding, siding, metal, and insulation products; and structural products include lumber, plywood, oriented strand boards, rebars and remesh, spruce, and other wood products primarily that are used for structural support in construction projects.

Ferguson plc distributes plumbing and heating products in the United States and Canada. It offers plumbing and heating solutions to customers in the residential, commercial, civil/infrastructure, and industrial end markets.

MSC Industrial Direct Co., Inc., together with its subsidiaries, distributes metalworking and maintenance, repair, and operations (MRO) products and services in the United States, Canada, Mexico, and the United Kingdom.

Fastenal Company, together with its subsidiaries, engages in the wholesale distribution of industrial and construction supplies in the United States, Canada, Mexico, North America, and internationally.

Watsco, Inc., together with its subsidiaries, distributes air conditioning, heating, refrigeration equipment, and related parts and supplies. The company distributes equipment comprising residential ducted and ductless air conditioners, such as gas, electric, and oil furnaces; commercial air conditioning and heating equipment systems; and other specialized equipment.