6. Boston Properties
| Address | 800 Boylston St. |
| City | Boston |
| State | MA |
| Zip | 02199 |
| Website | www.bostonproperties.com |
| Phone | 617.236.3300 |
| Officers | Mortimer B. Zuckerman, Executive Chairman; Owen D. Thomas, CEO & Director; Douglas T. Linde, President & Director |
| Office Space Owned | 39,864,484 |