EDGAR Company Filings
From the US Securities and Exchange Commission, search over 21 million public company filings. Contains company financial information and operations by reviewing registration statements, prospectuses and periodic reports filed on Forms 10-K and 10-Q.
NCCS (National Center for Charitable Statistics) Data Web
1989-present: NCCS Data Web, maintained by the National Center for Charitable Statistics, offers a weath of data about the non-profit sector in the United States. Data include the Busines Master File (BMF), which has descriptive data on organizations registered with the IRS; IRS Return Transaction Files (RTF), which contains financial data for organizations that file IRS Forms 990, Form 990-EZ, or Form 990-PF; and IRS Statistics of Income Sample Files (SOI), which has 300 variables for 501(c)(3) organizations.