You can easily export this data from the History tab for any of your previous sends. Click on the number under 'Reach', 'Opens', or 'Clicks'.
Once that list is showing, simply click 'Export' to export this data to a spreadsheet to further review or share among your colleagues or clients.
You can also click on the contact themselves to open them up separately to get a more detailed look at their activity -- marketing pieces they've opened and if they've clicked any links in your marketing pieces.