Data on landownership in general and corporate landownershi p in particular are meager. This study examines Security and Exchange Commission reporting requirements for publicly traded corporations, aggregates the available data, assesses the data source, and suggests means to improve the data. Landholdings of 568 firms, each reporting holdings of 500 or more acres, total 57.8 million acres of owned land, 80.9 million acres of leaseholds, and an undisclosed interest in 163.0 million acres in the United States. Most owned land is used for timber production. Helpful amendments to reporting requirements from a research perspective are the reporting of an inventory of acres owned and controlled, by State and use category.