EDGAR:Coverage varies by company. Electronic filing with the SEC was phased in during 1994-1996. Only forms that were filed electronically are available in EDGAR
LexisNexis: Coverage starts in 1993 for all filings, with selected filings back to 1985.
Mergent Online: advanced search capabilities and includes all filing types. Filings are available as HTML, Word, PDF or Excel. It also offers the ability to download sections of some documents, which can be helpful with large documents.
Thomson ONE: Filings prior to 1994 are available for many companies, but the dates and specific filings available vary by company.
OneSource: the most user-friendly interface and filings are available as HTML, Word, PDF or Excel. Access is restricted to Chicago Booth students and faculty. Choose "Precision Search", then SEC Filings.
Microfiche: The microfiche collection is located on the third floor of Regenstein Library. There are print indices to the fiche collection. Use these to locate the fiche for your company.