Smurfit Westrock Plc, together with its subsidiaries, manufactures, distributes, and sells containerboard, corrugated containers, and other paper-based packaging products in Ireland and internationally. The company produces containerboard that it converts into corrugated containers or sells to third parties, as well as produces other types of paper, such as consumer packaging board, sack paper, graphic paper, solid board and graphic board, and other paper-based packaging products, such as consumer packaging, solid board packaging, paper sacks, and other packaging products, including bag-in-box. It also produces linerboard and corrugated medium, paperboard, and non-packaging grades of paper, as well as converted products, such as folding cartons and corrugated boxes, and other products; recycled paper-based packaging products; and packaging machinery. The company primarily serves food and beverage, e-commerce, retail, consumer goods, industrial, and foodservice markets. Smurfit Westrock Plc was founded in 1934 and is headquartered in Dublin, Ireland.

Packaging Corporation of America manufactures and sells containerboard and corrugated packaging products in the United States. The company operates through three segments: Packaging, Paper, and Corporate and Other. The Packaging segment offers various containerboard and corrugated packaging products, such as conventional shipping containers used to protect and transport manufactured goods; multi-color boxes and displays that help to merchandise the packaged product in retail locations; and honeycomb protective packaging products, as well as packaging for meat, fresh fruit and vegetables, processed food, beverages, and other industrial and consumer products. This segment sells its corrugated products through a direct sales and marketing organization, independent brokers, and distribution partners. The Paper segment manufactures and sells commodity and specialty papers, as well as communication papers, including cut-size office papers, and printing and converting papers. This segment sells white papers through its sales and marketing organization. The Corporate and Other segment includes corporate support staff services and related assets and liabilities; and transportation assets, such as rail cars and trucks for transportation. Packaging Corporation of America was founded in 1867 and is headquartered in Lake Forest, Illinois.

Crown Holdings, Inc., together with its subsidiaries, engages in the packaging business in the United States and internationally. It operates through Americas Beverage, European Beverage, Asia Pacific, and Transit Packaging segments. The company manufactures and sells recyclable aluminum beverage cans and ends, glass bottles, steel crowns, aluminum caps, non-beverage cans, and aerosol cans and closures. It also provides manual, semi-automatic, and automatic equipment and tools to apply and remove consumables, such as straps and films; protective solutions, including airbags, edge protectors, and honeycomb products; and steel and plastic consumables include steel strap, plastic strap, industrial film, and other related products. The company serves food industries, including pet food, personal care, household, and industrial products. Crown Holdings, Inc. was founded in 1892 and is headquartered in Yardley, Pennsylvania.

Silgan Holdings Inc., together with its subsidiaries, manufactures and sells rigid packaging solutions for consumer goods products in the United States and internationally. It operates through three segments: Dispensing and Specialty Closures, Metal Containers, and Custom Containers. The Dispensing and Specialty Closures segment offers a range of metal and plastic closures, and dispensing systems for food, beverage, health care, garden, home, personal care, beauty products, and hard surface cleaning products, as well as capping/sealing equipment and detection systems. The Metal Containers segment manufactures and sells steel and aluminum containers for food products, such as pet food, vegetables, soups, proteins, fruits, and other miscellaneous food products, as well as general line metal containers primarily for chemicals. The Custom Containers segment manufactures and sells custom designed and stock plastic containers for use in personal care and health care; food and beverage; household and industrial chemical; pharmaceutical; pet food and care; agricultural; automotive. This segment also provides thermoformed barrier and non-barrier bowls, and trays for food products, such as soups, other ready-to-eat meals, and pet food products; and plastic closures, caps, sifters, and fitments, as well as thermoformed tubs for food, household, and personal care products. The company markets its products primarily through direct sales force, as well as through a network of distributors, and an online shopping catalog. The company was founded in 1987 and is headquartered in Stamford, Connecticut.

Sonoco Products Company, together with its subsidiaries, designs, develops, manufactures, and sells various engineered and sustainable packaging products in North and South America, Europe, Australia, and Asia. The company operates Consumer Packaging and Industrial Paper Packaging segments. The Consumer Packaging segment offers round and shaped rigid paper, steel, and plastic containers; metal and peelable membrane ends, closures, and components; thermoformed plastic trays and enclosures; and high-barrier flexible packaging products. The Industrial Paper Packaging segment provides paperboard tubes, cones, and cores; paper-based protective packaging products; and uncoated recycled paperboard products. It also offers various packaging materials, including plastic, paper, foam, and other specialty materials. Sonoco Products Company sells its products in various markets, which include paper, textile, film, food, packaging, construction, and wire and cable. The company was founded in 1899 and is headquartered in Hartsville, South Carolina.

Pactiv Evergreen Inc. manufactures and distributes fresh foodservice and food merchandising products, and fresh beverage cartons in the United States, rest of North America, and internationally. It operates in two segments, Foodservice, and Food and Beverage Merchandising. The Foodservice segment offers food containers; drinkware, such as hot and cold cups and lids; and tableware, service ware, and other products. The Food and Beverage Merchandising segment manufactures cartons for fresh refrigerated beverage products, including dairy, juice, and other specialty beverage; clear rigid-display containers, containers for prepared and ready-to-eat food, and trays for meat and poultry and egg cartons; fiber-based liquid packaging board; and supplies fresh carton systems comprises printed cartons, spouts, and filling machinery. It serves its products to full-service restaurants, quick service restaurants, foodservice distributors, supermarkets, grocery and healthy eating retailers, other food stores, food and beverage producers, and food packers and food processors. The company was formerly known as Reynolds Group Holdings Limited. The company was founded in 1880 and is headquartered in Lake Forest, Illinois. Pactiv Evergreen Inc. is a subsidiary of Packaging Finance Limited.

Greif, Inc. engages in the production and sale of industrial packaging products and services worldwide. The company operates through Global Industrial Packaging; Paper Packaging & Services; and Land Management segments. The Global Industrial Packaging segment produces and sells industrial packaging products, including steel, fiber, and plastic drums; rigid and flexible intermediate bulk containers; closure systems for industrial packaging products; transit protection products; water bottles, and remanufactured and reconditioned industrial containers; and various services, such as container life cycle management, filling, logistics, warehousing, and other packaging services to chemicals, paints and pigments, food and beverage, petroleum, industrial coatings, agriculture, pharmaceuticals, mineral product, and other industries. The Paper Packaging & Services segment produces and sells containerboards, corrugated sheets and containers, and other corrugated and specialty products to customers in the packaging, automotive, food, and building products markets; and produces and sells coated and uncoated recycled paperboard, and recycled fiber. This segment's corrugated container products are used to ship various products, such as home appliances, small machinery, grocery products, automotive components, books, and furniture, as well as various other applications. The Land Management segment engages in harvesting and regeneration of timber properties; and sale of timberland and special use properties. As of October 31, 2023, this segment owned approximately 175,000 acres of timber properties in the southeastern United States. The company was formerly known as Greif Bros. Corporation and changed its name to Greif, Inc. in 2001. Greif, Inc. was founded in 1877 and is headquartered in Delaware, Ohio.

WestRock Company, together with its subsidiaries, provides fiber-based paper and packaging solutions in North America, South America, Europe, Asia, and Australia. It operates through four segments: Corrugated Packaging, Consumer Packaging, Global Paper, and Distribution. The Corrugated Packaging segment produces containerboards, corrugated sheets, corrugated packaging, and preprinted linerboards to consumer and industrial products manufacturers, and corrugated box manufacturers. It also provides structural and graphic design, engineering services and custom, and proprietary and standard automated packaging machines; turn-key installation, automation, line integration, and packaging solutions; machinery solution that creates pouches; and pack temporary displays, as well as lithographic laminated packaging products. The Consumer Packaging segment manufactures and sells folding cartons that are used to package food, paper, beverages, dairy products, confectionery, health and beauty, and other household consumer products, as well as express mail packages for the overnight courier industry. It also offers inserts and labels, as well as rigid packaging and other printed packaging products, such as transaction cards, brochures, product literature, marketing materials, and grower tags, and plant stakes; and paperboard packaging for over-the-counter and prescription drugs. In addition, this segment manufactures and sells solid fiber and corrugated partitions, and die-cut paperboard components. The Global Paper segment manufactures containerboard, paperboard, and specialty grades primarily to corrugated packaging, folding carton, food service, liquid packaging, tobacco, and commercial print markets. The Distribution segment distributes corrugated packaging materials and other specialty packaging products, including stretch films, void fills, carton sealing tapes, and other specialty tapes; and provides contract packing services. The company is based in Atlanta, Georgia. As of July 5, 2024, WestRock Company operates as a subsidiary of Smurfit Kappa Group Plc.