Included below are the online databases most commonly used to find financial data (for calculating ratios):
The EDGAR database, maintained by the U.S. Securities and Exchange Commission, enables users to search for public company financials and operations filings required by law. Users may also search for information provided by mutual funds (including money market funds), exchange-traded funds (ETFs), and variable annuities. Free resource.
GuideStar provides information on faith-based organizations and IRS-registered nonprofit organizations, including mission, operations, finances, transparency, executives/key employees, board leadership, and governance. Where available, IRS Forms 990 may be viewed and downloaded.