As of December 31, 2014, the company owned and managed approximately 6.58 million acres (2,660,000 ha) of timber lands in 19 states, as well as owned and operated five wood product conversion facilities in the northwest U.S.[1]: 8 On November 8, 2015, it was announced that Plum Creek would be bought by Seattle-based Weyerhaeuser for $8.4 billion, forming the largest private owner of timberland in the United States.

[7] In 2008, Senator Max Baucus arranged for appropriations in the 2008 Farm Bill to be used to purchase 310,000 acres (130,000 ha) of Plum Creek land in Montana.

This follows on the heels of their development of managed land in Washington state (Suncadia) and Montana (Moonlight Basin, Yellowstone Club) into costly resorts, bringing golf courses and luxury housing into the deep forests.

[8] In 2001, Plum Creek at their Medium Density Fiberboard facility completed the installation of a biofilter, a new air emission treatment technology.

This technology uses naturally occurring bacteria to destroy air pollutants that are generated in the wood fiber drying and pressing processes.

According to an environmental group, the Native Forest Network (NFN), if approved by the Land Use Regulation Commission, Plum Creek's plan would increase Maine's total carbon emissions by nearly 8%.