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.

Reynolds Consumer Products Inc. produces and sells products in cooking, waste and storage, and tableware product categories in the United States and internationally. It operates through four segments: Reynolds Cooking & Baking, Hefty Waste & Storage, Hefty Tableware, and Presto Products. The Reynolds Cooking & Baking segment produces aluminum foil, disposable aluminum pans, parchment paper, freezer paper, wax paper, butcher paper, plastic wrap, baking cups, oven bags, and slow cooker liners under the Reynolds Wrap, Reynolds KITCHENS, and EZ Foil brands in the United States, as well as under the ALCAN brand in Canada and under the Diamond brand internationally. The Hefty Waste & Storage segment offers trash bags under the Hefty Ultra Strong and Hefty Strong brands; and food storage bags under the Hefty and Baggies brands. This segment also provides a suite of products, including compostable bags, bags made from recycled materials, and the orange bags. The Hefty Tableware segment offers disposable and compostable plates, bowls, platters, cups, and cutlery under the Hefty brand. The Presto Products segment primarily sells store brand products in food storage bags, trash bags, reusable storage containers, and plastic wrap categories. It offers both branded and store brand products to grocery stores, mass merchants, warehouse clubs, discount chains, dollar stores, drug stores, home improvement stores, military outlets, and eCommerce retailers. The company was founded in 1947 and is headquartered in Lake Forest, Illinois. Reynolds Consumer Products Inc. is a subsidiary of Packaging Finance Limited.

Constellium SE, together with its subsidiaries, engages in the design, manufacture, and sale of rolled and extruded aluminum products for the packaging, aerospace, automotive, defense, and other transportation and industry end-markets. The company operates through three segments: Packaging & Automotive Rolled Products, Aerospace & Transportation, and Automotive Structures & Industry. The Packaging & Automotive Rolled Products segment produces rolled aluminum products, including can stock and closure stock for the beverage and food industry, as well as foil stock for the flexible packaging market. This segment also supplies automotive body sheets and heat exchangers for the automotive market; and specialty reflective sheets. The Aerospace & Transportation segment provides rolled aluminum products, including aerospace plates, sheets, and extrusions; and aerospace wing skins, as well as plates and sheets for use in transportation, industry, and defense applications. The Automotive Structures & Industry segment offers extruded aluminium products and aluminium structural components for the automotive industry, including crash-management systems, body structures, side impact beams, and battery enclosures; and fabricates hard and soft alloy extruded profiles for various industry applications in the automotive, engineering, rail, and other transportation end markets. This segment also provides downstream technology and services, which include pre-machining, surface treatment, research and development, and technical support services. It sells its products directly or through distributors in France, Germany, the Czech Republic, the United Kingdom, Switzerland, and the United States, as well as Shanghai, and Seoul. The company was incorporated in 2010 and is headquartered in Paris, France.

Kaiser Aluminum Corporation, together with its subsidiaries, engages in manufacture and sale of semi-fabricated specialty aluminum mill products in the United States and internationally. It offers rolled, extruded, and drawn aluminum products used for aerospace and defense, aluminum beverage and food packaging, automotive and general engineering products. The company's automotive extrusions include extruded aluminum products for structural components, crash management systems, anti-lock braking systems, and drawn tubes for drive shafts, as well as offers fabrication services, including sawing and cutting to length. Its packaging products consist of bare and coated 3000- and 5000-series alloy aluminum coil used for beverage and food packaging industry. In addition, the company's general engineering products comprise alloy plate, sheet, rod, bar, tube, wire, and standard extrusion shapes used in various applications, including the production of military vehicles, ordnances, semiconductor manufacturing cells, electronic devices, after-market motor sport parts, tooling plates, parts for machinery and equipment, bolts, screws, nails, and rivets. Further, its rerolled, extruded, drawn, and cast billet aluminum products used for industrial end uses. The company sells its products directly to customers through sales personnel located in the United States, Canada, Western Europe, and China, as well as through independent sales agents in other regions of Asia, Latin America, and the Middle East. Kaiser Aluminum Corporation was founded in 1946 and is headquartered in Franklin, Tennessee.

TriMas Corporation engages in the design, development, manufacture, and sale of products for consumer products, aerospace, and industrial markets worldwide. The company operates through Packaging, Aerospace, and Specialty Products segments. The Packaging segment offers dispensing products, such as foaming and sanitizer pumps, lotion and hand soap pumps, beverage dispensers, perfume sprayers, and nasal and trigger sprayers; polymeric and steel caps and closures comprising food lids, flip-top and beverage closures, child resistance caps, drum and pail closures, and flexible spouts; polymeric jar products; integrated dispensers; bag-in-box products; and consumable vascular delivery and diagnostic test components under the Rieke, Taplast, Affaba & Ferrari, Intertech, Omega, and Rapak brands. The Aerospace segment provides fasteners, collars, blind bolts, rivets, ducting, and connectors for air management systems, and other highly-machined parts and components to original equipment manufacturers, supply chain distributors, and tier one suppliers, as well as maintenance, repair and overhaul (MRO)/aftermarket providers; and military and defense aerospace applications and platforms under the Monogram Aerospace Fasteners, Allfast Fastening Systems, Mac Fasteners, TFI Aerospace, RSA Engineered Products, and Martinic Engineering brands. The Specialty Products segment offers steel cylinders for use in the transportation, storage, and dispensing of compressed gases under the Norris Cylinder brand; natural gas powered wellhead engines, compressors, and replacement parts for oil and natural gas production, and other industrial and commercial markets under the Arrow brand; and spare parts for various industrial engines. It sells its products through a direct sales force, third-party agents, and distributors. TriMas Corporation was incorporated in 1986 and is headquartered in Bloomfield Hills, Michigan.

Trinseo PLC operates as a specialty material solutions provider in the United States, Europe, the Asia-Pacific, and internationally. It operates through five segments: Engineered Materials, Latex Binders, Plastics Solutions, Polystyrene, and Americas Styrenics. The Engineered Materials segment offers rigid thermoplastic compounds and blends, soft thermoplastic, continuous cast, cell cast, activated methyl methacrylates (MMA), PMMA resins, and extruded PMMA sheets and resins for consumer electronics, medical, footwear, automotive, and building and construction applications under the EMERGE, CALIBRE, PLEXIGLAS, ALTUGLAS, ACRYSPA, AVONITE, STUDIO, MEGOL, APILON, APIGO, and APINAT brands. The Latex Binders segment provides styrene-butadiene latex, and other latex polymers and binders primarily for coated paper and packaging board, carpet, and artificial turf backings, as well as the adhesive, building and construction, and technical textile paper market. The Plastics Solutions segment offers acrylonitrile-butadiene-styrene, styrene-acrylonitrile, polycarbonate, and compounds and blends for automotive and other applications under the MAGNUM brand. The Polystyrene segment provides general purpose polystyrenes and high impact polystyrene for use in appliances, food packaging and food service disposables, consumer electronics, and building and construction materials under the STYRON brand. The Americas Styrenics segment provides styrene and polystyrene for appliances, food packaging, food service disposables, consumer electronics, and building and construction materials applications. Trinseo PLC was incorporated in 2015 and is headquartered in Wayne, Pennsylvania.

As of November 4, 2024, Glatfelter Corporation was acquired by Health, Hygiene and Specialties Global Nonwovens and Films Business of Berry Global Group, Inc.