Weyerhaeuser Company is a real estate investment trust (REIT). The Company is an owner of timberlands. It is principally engaged in growing and harvesting timber, as well as manufacturing, distributing and selling products made from trees. Its segments include Timberlands, Wood Products and Cellulose Fibers. It owns approximately seven million acres of timberlands, primarily in the United States, and manages additional timberlands under long-term licenses in Canada. It is engaged in the manufacturing of wood and specialty cellulose fibers products. Its Timberlands products include logs, timberland, timber, minerals, oil and gas, and other products, which includes seed and seedlings, recreational leases, as well as plywood and hardwood lumber. Its wood products include structural lumber, engineered wood products, structural panels and complimentary building products. Its Cellulose Fibers products are pulp and liquid packaging board.