WEYERHAEUSER CO

We were incorporated as Weyerhaeuser Timber Company in the state of Washington in January 1900, when Frederick Weyerhaeuser and 15 partners bought 900 thousand acres of timberland. Today, we are working to be the world's premier timber, land and forest products company for our shareholders, customers and employees.

REAL ESTATE INVESTMENT TRUST (REIT)

Weyerhaeuser Company is a REIT and REIT income can be distributed to shareholders without first paying corporate level tax, substantially eliminating the double taxation on income. We also own timberland assets through a subsidiary, Weyerhaeuser Timber Holdings, Inc., which qualifies as a REIT under the Internal Revenue Code of 1986, as amended (IRC), for tax years beginning 2022. We expect to derive most of our REIT income from our timberlands, including gains from the sales of our standing timber and rent from recreational leases. We are required to pay federal corporate income taxes on earnings of our Taxable REIT Subsidiaries (TRSs), which include our Wood Products segment and a portion of our Timberlands and Real Estate, Energy and Natural Resources segments.

WEYERHAEUSER COMPANY >2023 ANNUAL REPORT AND FORM 10-K 1

OUR BUSINESS SEGMENTS

In our Management’s Discussion and Analysis of Financial Condition and Results of Operations (MD&A) section you will find discussion of our overall performance results for our business segments, which are as follows:

Detailed financial information about our business segments and our geographic locations is provided in Note 2: Business Segments and Note 20: Geographic Areas.

EFFECT OF MARKET CONDITIONS

The health of the U.S. housing market strongly affects the performance of all our business segments. Our Wood Products segment primarily sells into the new residential building and repair and remodel markets. Demand for sawlogs within our Timberlands segment is directly affected by domestic production of wood-based building products as well as export markets. Seasonal weather patterns impact the level of construction activity in the U.S., generally characterized by a reduction in activity during the winter months, which in turn affects the demand for our logs and wood products. Our Real Estate & ENR segment is affected by a variety of factors, including the general state of the economy, local real estate market conditions, the level of construction activity in the U.S. and the evolution of emerging renewable energy and carbon-related markets.

COMPETITION IN OUR MARKETS

We operate in highly competitive domestic and foreign markets, with numerous companies selling similar products. Many of our products also face competition from substitutes for wood products. We compete in our markets primarily through product quality, service levels and price. We are relentlessly focused on operational excellence, producing quality products customers want and are willing to pay for, at the lowest possible cost.

Our business segments’ competitive strategies are as follows: