The Official Board provides organizational charts for companies with more than $100 million in annual revenue. Free registration is required.
Some companies make organizational charts available on their own websites, so it is always worth a look at the corporate website (often in an About Us or Corporate Governance section).
Finally, you may want to look at Organization Charts: Structures of 230 Businesses, Government Agencies, and Non-Profit Organizations, a print resource available in Pius Library. See the catalog record for more information.