High Quality Content by WIKIPEDIA articles! Weyerhaeuser is one of the largest pulp and paper companies in the world. It is the world`s largest private sector owner of softwood timberland; and the second largest owner of United States timberland, behind Plum Creek Timber. Weyerhaeuser has approximately 20,000 employees in 13 countries, including the United States, Canada, Australia, New Zealand, China, Mexico, Ireland, France, and Uruguay.