About this Database

Data on stock ownership by institutions, other major holders and insiders.

Formerly called Spectrum, Thomson Reuters Insider Filing Data (Forms 3, 4, 5, and 144) goes back to 1978; a cleansed version is available only back to 1986. Institutional (Form 13F) and 5 Percent Owner Databases go back to 1980; the Domestic Mutual Fund Database goes back to 1979.

In WRDS, click on Thomson Reuters, then on the appropriate filing type.