X0202 5 2006-12-31 0 0 0 0000315293 AON CORP AOC 0001145037 RYAN PATRICK G C/O AON CORPORATE LAW DEPARTMENT 8TH FLOOR, 200 EAST RANDOLPH DRIVE CHICAGO IL 60601 1 1 0 0 Executive Chairman Common Stock 2006-08-29 5 G 0 1000000 33.81 D 8301904 I By Spouse Common Stock 7999802 D Shares disposed of as gifts to public charities by the living trust of the reporting person's spouse. The reporting person is also the indirect beneficial owner of the following securities: 393,935 by ESOP and Savings Plan; 583,942 by Spouse as Trustee. /s/ Patrick G. Ryan 2007-02-12