This week, Weyerhaeuser Co. (NYSE:WY) completed its acquisition of Plum Creek Timber Co. (NYSE:PCL) and is now known as a $23 billion timber REIT that holds the largest private ownership of timberland in the U.S. with assets adding up to more than 13 million acres. The agreement to merge was announced this past November and was given a “thumbs up” by rating agencies, according to Commercial Property Executive.