Quicken will keep track of all your dividends, splits, mergers, etc. It's easiest to capture the history as it occurs, but you can backfill data using QIF import with some work. I have dividend, split, and merger data for quite a few dividend producing stocks going back to 1999 in my file and in the files I keep for my niece and nephews. I've used both methods to capture this data - adding transactions as they occurred via transaction download or manual entry and by utilizing QIF imports.