Tenants
- Aon plc maintains its headquarters in the Aon Center.
- Chicagoland Chamber of Commerce, Suite 2200
- Agency.com
- BP (formerly British Petroleum), successor to Amoco and Standard Oil of Ohio
- Jones Lang LaSalle
- Daniel Edelman Inc.
- Marketing Support Inc.
- ThoughtWorks
- R.H. Donnelley
- Strata Decision Technology
- The Federal Home Loan Bank of Chicago
- The Mid-America Club
- Veolia
- Microsoft
- KPMG
It was the headquarters of the Miller-Chicago Electric Company from 1974 to 1999, at which time the company was broken up.
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