Was Aon in the Twin Towers?

Written by Editorial Team | Last Updated: August 2026

Yes, Aon Corporation, a major global professional services and insurance brokerage firm, had its corporate offices located inside the Twin Towers of the World Trade Center in New York City on September 11, 2001. The firm occupied multiple upper floors—specifically floors 92, 98, 99, and 100—within the South Tower (World Trade Center 2). When the hijacked United Airlines Flight 175 struck the South Tower between the 77th and 85th floors, the impact zone directly compromised the building structures above, trapping many occupants and creating catastrophic damage. Tragically, 176 employees of Aon Corporation lost their lives that day, making it one of the corporate entities that suffered the highest loss of life during the terrorist attacks. The company's legacy and the memory of its fallen staff continue to be honored through educational funds and memorials.

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