The United States Security and Exchange Commission's EDGAR database is the primary source of 10-Q and 10-K reports. However, several databases have taken financial data from EDGAR and put it into table format for ease of use, Factiva and Mergent Online.
3. Is there a database that allows me to compare multiple stocks, for example, comparing UPS vs. Fedex in terms of P/E ratio, market cap size, etc.?
Market cap is available in Factiva. Ratios are available in the databases Factiva and InvestorEdge.