when did aon go public

Aon (AON) went public on September 7, 1984, when it opened at a split-adjusted price of $1.98.

DATEOPENHIGHLOWCLOSEVOLUME
October 2026
$277.48
$292.73
$266.33
$292.55
20,793,467
September 2026
$321.42
$336.45
$269.02
$276.77
47,518,100
August 2026
$362.04
$366.32
$320.21
$321.52
18,713,700
July 2026
$327.08
$381.47
$327.08
$359.73
30,598,300
June 2026
$313.07
$339.99
$310.36
$330.94
39,426,600
May 2026
$325.78
$329.47
$305.82
$315.34
30,801,800
April 2026
$320.30
$336.32
$305.52
$310.12
27,273,700
March 2026
$330.39
$342.96
$310.52
$321.20
30,874,400
February 2026
$351.41
$356.29
$303.10
$333.83
35,329,900
January 2026
$348.66
$352.93
$323.61
$347.19
23,980,800
December 2025
$350.21
$356.03
$334.07
$350.40
19,760,900
November 2025
$337.04
$353.12
$328.82
$351.44
22,464,200
October 2025
$351.89
$366.91
$321.30
$337.55
27,719,300
September 2025
$364.25
$372.42
$345.44
$353.30
26,417,200
August 2025
$353.40
$375.22
$348.21
$363.63
26,653,800
July 2025
$353.11
$376.71
$341.88
$351.70
29,771,400
June 2025
$363.91
$375.63
$342.79
$352.74
27,931,700
May 2025
$347.22
$368.79
$343.51
$367.89
24,530,500
April 2025
$393.09
$395.68
$319.41
$350.06
39,061,200
March 2025
$404.68
$407.46
$381.99
$393.77
27,778,900
February 2025
$365.14
$404.52
$360.56
$403.66
20,158,900
January 2025
$355.08
$372.79
$340.83
$365.21
22,241,100
December 2024
$386.07
$386.36
$347.03
$353.72
21,107,100
November 2024
$360.14
$389.35
$356.67
$385.61
20,918,600
October 2024
$342.97
$382.61
$336.12
$360.65
22,629,100