
Weyerhaeuser Company (WY), valued at a market cap of $18.5 billion, is one of the largest private owners of timberlands in the United States, operating as a real estate investment trust (REIT). Founded in 1900 by Frederick Weyerhaeuser, the company owns or controls approximately 10.4 million acres of timberlands in the U.S. and manages additional timberlands under long-term licenses in Canada.