NYSE:AON | Historical Stock Price | Aon plc

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
1980-06-02 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$2.39$8.08$27.30$92.20$311.44$1,051.961980-06-022026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

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Historical Stock Price — 2018

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2018-12-31$145.36$341.67741,700
2018-12-28$143.70$337.77841,800
2018-12-27$143.13$336.431,444,900
2018-12-26$140.29$329.751,081,700
2018-12-24$137.44$323.06729,500
2018-12-21$141.25$332.013,070,700
2018-12-20$145.77$342.631,244,400
2018-12-19$148.31$348.611,085,800
2018-12-18$150.31$353.31854,000
2018-12-17$150.37$353.451,155,600
2018-12-14$153.83$361.58962,900
2018-12-13$156.10$366.92984,900
2018-12-12$155.40$365.271,057,000
2018-12-11$155.75$366.09820,300
2018-12-10$157.73$370.75827,900
2018-12-07$158.73$373.10770,100
2018-12-06$160.56$377.401,096,800
2018-12-04$162.72$382.48898,800
2018-12-03$164.97$387.76988,200
2018-11-30$165.11$388.092,568,200
2018-11-29$163.68$384.73758,300
2018-11-28$163.99$385.461,001,600
2018-11-27$161.48$379.56846,800
2018-11-26$162.01$380.81868,000
2018-11-23$161.25$379.02448,000
2018-11-21$161.07$378.60832,500
2018-11-20$161.67$380.011,063,400
2018-11-19$165.58$389.20921,100
2018-11-16$164.05$385.60959,100
2018-11-15$163.06$383.28924,800
2018-11-14$162.02$380.83977,900
2018-11-13$163.30$383.84957,200
2018-11-12$162.89$382.881,152,000
2018-11-09$164.54$386.75911,300
2018-11-08$164.83$387.441,133,000
2018-11-07$163.05$383.251,085,200
2018-11-06$159.59$375.12902,000
2018-11-05$158.18$371.80591,600
2018-11-02$156.18$367.10739,600
2018-11-01$155.70$365.98941,100
2018-10-31$156.18$367.101,551,700
2018-10-30$158.70$372.092,344,900
2018-10-29$155.19$363.861,712,800
2018-10-26$152.31$357.102,578,200
2018-10-25$149.98$351.641,427,900
2018-10-24$146.30$343.01857,500
2018-10-23$149.51$350.54658,000
2018-10-22$151.44$355.07805,700
2018-10-19$151.10$354.27737,000
2018-10-18$149.51$350.54468,400
2018-10-17$150.46$352.77775,000
2018-10-16$149.85$351.34635,100
2018-10-15$147.18$345.08631,900
2018-10-12$147.84$346.621,080,600
2018-10-11$148.22$347.521,367,300
2018-10-10$151.14$354.361,076,900
2018-10-09$157.12$368.38647,600
2018-10-08$156.21$366.25634,700
2018-10-05$155.52$364.631,003,300
2018-10-04$157.42$369.09892,800
2018-10-03$156.89$367.841,441,200
2018-10-02$156.25$366.34662,300
2018-10-01$154.85$363.06475,800
2018-09-28$153.78$360.55960,200
2018-09-27$155.68$365.01849,200
2018-09-26$154.64$362.57854,800
2018-09-25$155.81$365.311,260,400
2018-09-24$155.16$363.791,117,500
2018-09-21$156.47$366.861,483,500
2018-09-20$155.16$363.79904,800
2018-09-19$155.24$363.971,233,700
2018-09-18$152.88$358.441,203,500
2018-09-17$152.15$356.73820,600
2018-09-14$151.97$356.31766,400
2018-09-13$151.41$354.99657,000
2018-09-12$151.08$354.22763,600
2018-09-11$151.02$354.08766,900
2018-09-10$149.74$351.08565,800
2018-09-07$150.02$351.74820,600
2018-09-06$150.43$352.701,025,800
2018-09-05$147.73$346.37925,800
2018-09-04$146.87$344.35820,000
2018-08-31$145.56$341.28881,800
2018-08-30$144.38$338.51534,800
2018-08-29$146.14$342.64509,800
2018-08-28$145.05$340.08550,000
2018-08-27$145.33$340.74465,500
2018-08-24$145.44$341.001,319,200
2018-08-23$143.16$335.65761,400
2018-08-22$143.14$335.61643,000
2018-08-21$144.36$338.47799,000
2018-08-20$143.01$335.30759,700
2018-08-17$143.45$336.33895,000
2018-08-16$142.82$334.85822,400
2018-08-15$141.12$330.87567,800
2018-08-14$140.85$330.24600,000
2018-08-13$140.48$329.37852,900
2018-08-10$141.76$332.37659,600
2018-08-09$142.98$335.23431,800
2018-08-08$143.38$335.23425,600
2018-08-07$143.42$335.32572,800
2018-08-06$143.78$336.17766,200
2018-08-03$143.12$334.62849,500
2018-08-02$141.40$330.601,062,600
2018-08-01$142.32$332.75748,000
2018-07-31$143.55$335.631,141,000
2018-07-30$143.39$334.32986,400
2018-07-27$144.50$336.911,345,300
2018-07-26$148.19$345.511,049,900
2018-07-25$147.71$344.39877,900
2018-07-24$147.20$343.20788,500
2018-07-23$147.19$343.18797,100
2018-07-20$146.16$340.78670,400
2018-07-19$146.15$340.75649,400
2018-07-18$147.34$343.53629,900
2018-07-17$145.62$339.52555,300
2018-07-16$145.21$338.56740,100
2018-07-13$144.20$336.21662,700
2018-07-12$143.88$335.46679,600
2018-07-11$142.49$332.22709,300
2018-07-10$142.82$332.99700,600
2018-07-09$142.53$332.31984,600
2018-07-06$139.62$325.53837,400
2018-07-05$138.22$322.26710,800
2018-07-03$137.08$319.61411,000
2018-07-02$137.25$320.00777,600
2018-06-29$137.17$319.821,150,300
2018-06-28$136.18$317.51716,600
2018-06-27$134.99$314.73954,500
2018-06-26$137.75$321.17999,600
2018-06-25$137.70$321.05980,300
2018-06-22$137.14$319.751,073,800
2018-06-21$136.55$318.37926,800
2018-06-20$137.60$320.821,044,800
2018-06-19$139.70$325.711,066,900
2018-06-18$140.26$327.02769,000
2018-06-15$139.53$325.322,139,200
2018-06-14$140.21$326.90819,700
2018-06-13$141.27$329.38759,900
2018-06-12$141.87$330.77642,600
2018-06-11$142.64$332.57838,500
2018-06-08$142.97$333.34777,700
2018-06-07$142.04$331.17700,500
2018-06-06$141.63$330.21796,600
2018-06-05$140.72$328.09977,300
2018-06-04$141.38$329.63577,900
2018-06-01$140.08$326.60689,400
2018-05-31$139.87$326.111,393,400
2018-05-30$140.23$326.95749,800
2018-05-29$138.36$322.591,176,900
2018-05-25$142.22$331.59694,800
2018-05-24$142.39$331.99746,200
2018-05-23$142.14$331.40776,600
2018-05-22$142.91$333.20778,300
2018-05-21$142.08$331.26657,000
2018-05-18$141.30$329.45876,100
2018-05-17$140.94$328.61742,800
2018-05-16$139.99$326.391,076,900
2018-05-15$140.77$328.211,021,100
2018-05-14$143.23$333.95679,000
2018-05-11$144.09$335.95814,600
2018-05-10$144.24$336.301,090,100
2018-05-09$141.29$329.42911,700
2018-05-08$140.91$328.54716,600
2018-05-07$140.37$327.28755,000
2018-05-04$139.49$325.231,124,200
2018-05-03$140.00$326.41943,800
2018-05-02$139.79$325.92930,500
2018-05-01$142.86$333.08632,400
2018-04-30$142.47$332.171,000,900
2018-04-27$144.23$335.34646,500
2018-04-26$143.50$333.651,019,800
2018-04-25$141.97$330.091,022,500
2018-04-24$142.33$330.93998,300
2018-04-23$143.78$334.30789,700
2018-04-20$144.04$334.90974,700
2018-04-19$144.82$336.72947,200
2018-04-18$144.20$335.27654,900
2018-04-17$144.08$335.00857,600
2018-04-16$143.78$334.30646,200
2018-04-13$142.02$330.21668,300
2018-04-12$141.60$329.231,018,300
2018-04-11$140.04$325.60759,300
2018-04-10$140.16$325.88716,000
2018-04-09$139.01$323.211,014,100
2018-04-06$138.20$321.32682,600
2018-04-05$140.17$325.90625,400
2018-04-04$140.13$325.81633,600
2018-04-03$138.74$322.58725,600
2018-04-02$138.19$321.301,148,100
2018-03-29$140.33$326.281,342,100
2018-03-28$139.46$324.25911,600
2018-03-27$138.82$322.771,306,300
2018-03-26$140.80$327.37934,900
2018-03-23$137.17$318.931,492,500
2018-03-22$139.31$323.901,562,200
2018-03-21$143.41$333.441,372,900
2018-03-20$145.28$337.79862,600
2018-03-19$145.00$337.13791,800
2018-03-16$145.97$339.391,431,000
2018-03-15$144.97$337.061,640,500
2018-03-14$144.22$335.321,196,700
2018-03-13$145.96$339.37876,100
2018-03-12$146.31$340.181,019,700
2018-03-09$148.03$344.181,489,300
2018-03-08$144.23$335.34791,600
2018-03-07$142.49$331.30891,100
2018-03-06$142.17$330.551,007,300
2018-03-05$141.38$328.721,136,500
2018-03-02$138.49$322.00819,700
2018-03-01$137.45$319.581,174,300
2018-02-28$140.32$326.251,811,000
2018-02-27$142.46$331.231,360,600
2018-02-26$143.30$333.18997,000
2018-02-23$141.91$329.951,080,600
2018-02-22$139.12$323.461,482,900
2018-02-21$139.37$324.041,099,500
2018-02-20$140.72$327.18940,400
2018-02-16$140.86$327.511,241,000
2018-02-15$140.89$327.581,292,300
2018-02-14$139.97$325.441,611,200
2018-02-13$139.23$323.721,196,600
2018-02-12$139.96$325.421,422,500
2018-02-09$137.91$320.652,396,700
2018-02-08$136.05$316.322,089,600
2018-02-07$140.55$326.791,959,900
2018-02-06$139.92$325.323,317,900
2018-02-05$140.34$326.302,567,800
2018-02-02$143.59$333.862,229,800
2018-02-01$144.48$335.931,374,100
2018-01-31$142.17$330.551,846,200
2018-01-30$141.75$328.741,463,500
2018-01-29$142.34$330.111,157,900
2018-01-26$143.47$332.731,184,600
2018-01-25$139.55$323.641,183,700
2018-01-24$138.83$321.971,209,500
2018-01-23$137.42$318.701,063,300
2018-01-22$135.98$315.361,136,900
2018-01-19$135.18$313.501,301,500
2018-01-18$135.08$313.271,132,100
2018-01-17$136.50$316.571,040,300
2018-01-16$134.54$312.021,265,500
2018-01-12$136.55$316.68905,700
2018-01-11$135.27$313.71737,100
2018-01-10$136.66$316.941,331,800
2018-01-09$136.92$317.541,457,300
2018-01-08$136.58$316.75925,300
2018-01-05$136.57$316.73820,700
2018-01-04$135.42$314.061,452,400
2018-01-03$133.59$309.821,201,800
2018-01-02$131.49$304.95878,000