Mergent Online Formerly, the Moody's Manuals, this tool contains about 15 years of data and other information about over 10,000 companies. Equity prices along with dividends and stock splits are included.
[Off Campus Access: MSU Only]
The Rutgers Libraries have a subscription that makes the entire set of reports from Mergent (formerly Moody's) dating back to the early 1900s available. You'll need to physically go to these libraries to access this.