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 — 1991

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1991-12-31$11.74$15.70186,300
1991-12-30$11.74$15.70388,800
1991-12-27$11.41$15.25334,463
1991-12-26$11.26$15.05362,813
1991-12-24$11.19$14.96165,375
1991-12-23$11.33$15.15427,950
1991-12-20$11.15$14.91417,825
1991-12-19$11.30$15.10118,800
1991-12-18$11.41$15.25135,000
1991-12-17$11.44$15.30247,050
1991-12-16$11.48$15.35227,813
1991-12-13$11.44$15.30174,825
1991-12-12$11.52$15.4086,063
1991-12-11$11.52$15.40465,413
1991-12-10$11.59$15.50152,550
1991-12-09$11.63$15.55357,750
1991-12-06$11.37$15.20187,988
1991-12-05$11.19$14.96125,213
1991-12-04$11.19$14.96226,125
1991-12-03$10.89$14.56307,463
1991-12-02$10.81$14.46145,800
1991-11-29$10.93$14.6160,750
1991-11-27$10.81$14.4682,350
1991-11-26$10.56$14.1176,950
1991-11-25$10.67$14.2689,438
1991-11-22$10.67$14.2660,413
1991-11-21$10.70$14.31116,775
1991-11-20$10.74$14.36164,700
1991-11-19$10.89$14.56376,313
1991-11-18$11.19$14.96186,638
1991-11-15$11.33$15.15261,900
1991-11-14$11.41$15.25541,013
1991-11-13$11.59$15.50645,300
1991-11-12$11.44$15.3068,850
1991-11-11$11.44$15.30105,300
1991-11-08$11.44$15.30395,213
1991-11-07$11.37$15.20216,338
1991-11-06$11.30$15.10106,988
1991-11-05$11.19$14.9662,438
1991-11-04$11.33$15.15186,975
1991-11-01$11.52$15.40142,088
1991-10-31$11.15$14.91236,250
1991-10-30$11.11$14.86233,550
1991-10-29$11.15$14.75342,563
1991-10-28$11.04$14.6087,750
1991-10-25$10.85$14.3662,100
1991-10-24$10.85$14.3681,675
1991-10-23$10.63$14.06147,488
1991-10-22$10.67$14.11146,813
1991-10-21$10.78$14.2678,300
1991-10-18$10.81$14.31306,450
1991-10-17$11.00$14.5545,225
1991-10-16$11.07$14.6561,763
1991-10-15$11.00$14.55222,750
1991-10-14$10.63$14.06116,775
1991-10-11$10.52$13.9148,600
1991-10-10$10.52$13.91226,800
1991-10-09$10.48$13.87175,163
1991-10-08$10.74$14.2192,813
1991-10-07$10.74$14.21109,350
1991-10-04$10.93$14.45104,625
1991-10-03$10.96$14.50133,988
1991-10-02$10.93$14.45123,863
1991-10-01$11.11$14.70414,113
1991-09-30$10.96$14.50180,563
1991-09-27$10.89$14.40268,313
1991-09-26$10.85$14.36203,175
1991-09-25$10.89$14.40111,375
1991-09-24$10.85$14.3679,650
1991-09-23$10.81$14.31194,400
1991-09-20$10.96$14.50254,475
1991-09-19$10.89$14.40187,650
1991-09-18$10.59$14.01304,763
1991-09-17$10.63$14.06297,338
1991-09-16$10.44$13.82131,625
1991-09-13$10.52$13.9196,863
1991-09-12$10.74$14.2152,988
1991-09-11$10.59$14.0166,825
1991-09-10$10.67$14.1173,913
1991-09-09$10.67$14.11199,463
1991-09-06$10.81$14.31266,625
1991-09-05$10.85$14.36169,425
1991-09-04$11.00$14.55244,688
1991-09-03$11.22$14.85125,550
1991-08-30$11.22$14.85114,075
1991-08-29$11.11$14.70128,588
1991-08-28$11.15$14.75137,363
1991-08-27$11.30$14.941,121,513
1991-08-26$11.33$14.99166,388
1991-08-23$11.33$14.99155,925
1991-08-22$11.37$15.04239,288
1991-08-21$11.30$14.94227,138
1991-08-20$11.22$14.85199,800
1991-08-19$11.22$14.85238,613
1991-08-16$11.48$15.19187,988
1991-08-15$11.44$15.14330,075
1991-08-14$11.41$15.09216,338
1991-08-13$11.37$15.04108,000
1991-08-12$11.26$14.8948,600
1991-08-09$11.11$14.70208,575
1991-08-08$11.07$14.65116,775
1991-08-07$11.19$14.8057,038
1991-08-06$11.37$15.04103,950
1991-08-05$11.33$14.9934,763
1991-08-02$11.44$15.1446,913
1991-08-01$11.37$15.0448,938
1991-07-31$11.30$14.94103,275
1991-07-30$11.52$15.08146,138
1991-07-29$11.19$14.64394,200
1991-07-26$11.30$14.79244,688
1991-07-25$11.41$14.93265,275
1991-07-24$11.52$15.08547,425
1991-07-23$11.93$15.61313,538
1991-07-22$11.89$15.5752,650
1991-07-19$11.81$15.4772,225
1991-07-18$11.70$15.32111,713
1991-07-17$11.67$15.2766,825
1991-07-16$11.74$15.37121,838
1991-07-15$11.85$15.52167,400
1991-07-12$11.59$15.18180,563
1991-07-11$11.41$14.9354,000
1991-07-10$11.44$14.98160,988
1991-07-09$11.41$14.9350,963
1991-07-08$11.48$15.03194,738
1991-07-05$11.41$14.93145,125
1991-07-03$11.41$14.93123,188
1991-07-02$11.44$14.9890,450
1991-07-01$11.37$14.89153,900
1991-06-28$11.19$14.64113,063
1991-06-27$11.11$14.5540,163
1991-06-26$11.07$14.5080,325
1991-06-25$11.11$14.55267,975
1991-06-24$11.15$14.6054,338
1991-06-21$11.19$14.64227,813
1991-06-20$11.33$14.8485,725
1991-06-19$11.37$14.89151,875
1991-06-18$11.41$14.93118,463
1991-06-17$11.33$14.84183,600
1991-06-14$11.44$14.98121,838
1991-06-13$11.48$15.03262,238
1991-06-12$11.52$15.08178,200
1991-06-11$11.56$15.13171,113
1991-06-10$11.67$15.27325,350
1991-06-07$11.93$15.61113,400
1991-06-06$12.15$15.9074,250
1991-06-05$12.22$16.00206,550
1991-06-04$12.22$16.0098,888
1991-06-03$12.11$15.86185,963
1991-05-31$12.11$15.86186,300
1991-05-30$12.00$15.71183,600
1991-05-29$11.85$15.52134,325
1991-05-28$11.85$15.52159,638
1991-05-24$11.44$14.9876,275
1991-05-23$11.30$14.79208,575
1991-05-22$11.33$14.84232,538
1991-05-21$11.44$14.98126,225
1991-05-20$11.30$14.7988,425
1991-05-17$11.22$14.69233,550
1991-05-16$11.19$14.6471,888
1991-05-15$11.19$14.64257,513
1991-05-14$11.48$15.03182,925
1991-05-13$11.59$15.1847,588
1991-05-10$11.56$15.13143,100
1991-05-09$11.56$15.1370,875
1991-05-08$11.56$15.13101,925
1991-05-07$11.37$14.8957,038
1991-05-06$11.22$14.69715,163
1991-05-03$11.15$14.60183,263
1991-05-02$11.22$14.69246,375
1991-05-01$10.93$14.30217,350
1991-04-30$10.93$14.15136,350
1991-04-29$11.19$14.4951,638
1991-04-26$11.33$14.68111,038
1991-04-25$11.41$14.77216,675
1991-04-24$11.44$14.8256,700
1991-04-23$11.33$14.68302,400
1991-04-22$11.44$14.82394,200
1991-04-19$11.56$14.96324,000
1991-04-18$11.59$15.01177,525
1991-04-17$11.48$14.87436,050
1991-04-16$11.48$14.87143,775
1991-04-15$11.41$14.77161,325
1991-04-12$11.33$14.68209,925
1991-04-11$11.37$14.7275,938
1991-04-10$11.26$14.5875,263
1991-04-09$11.26$14.58213,300
1991-04-08$11.33$14.68209,250
1991-04-05$11.26$14.58490,725
1991-04-04$11.15$14.44340,875
1991-04-03$11.26$14.581,009,463
1991-04-02$11.11$14.39172,800
1991-04-01$11.11$14.39249,413
1991-03-28$10.93$14.15121,163
1991-03-27$10.85$14.05235,913
1991-03-26$10.74$13.91119,138
1991-03-25$10.74$13.91118,463
1991-03-22$10.56$13.6781,675
1991-03-21$10.63$13.77189,675
1991-03-20$10.56$13.67144,788
1991-03-19$10.56$13.67350,325
1991-03-18$10.52$13.62343,575
1991-03-15$10.48$13.5783,700
1991-03-14$10.81$14.01312,863
1991-03-13$10.93$14.15168,413
1991-03-12$10.93$14.15133,988
1991-03-11$11.00$14.25106,650
1991-03-08$11.00$14.2573,238
1991-03-07$10.96$14.20232,875
1991-03-06$10.96$14.20134,325
1991-03-05$10.81$14.01316,238
1991-03-04$10.41$13.48159,300
1991-03-01$10.22$13.2474,925
1991-02-28$10.30$13.3355,350
1991-02-27$10.44$13.53171,113
1991-02-26$10.07$13.05295,650
1991-02-25$10.15$13.14698,963
1991-02-22$10.33$13.3889,775
1991-02-21$10.33$13.38316,575
1991-02-20$10.22$13.24701,663
1991-02-19$10.52$13.62268,988
1991-02-15$10.89$14.10421,538
1991-02-14$11.07$14.34511,650
1991-02-13$10.67$13.81308,813
1991-02-12$10.26$13.29794,138
1991-02-11$10.22$13.24323,325
1991-02-08$10.22$13.24142,088
1991-02-07$10.37$13.43375,975
1991-02-06$10.37$13.43381,038
1991-02-05$10.07$13.05414,788
1991-02-04$9.81$12.71182,925
1991-02-01$9.52$12.33182,250
1991-01-31$9.70$12.57811,013
1991-01-30$9.70$12.42259,538
1991-01-29$9.48$12.14335,138
1991-01-28$9.56$12.23177,525
1991-01-25$9.52$12.18302,063
1991-01-24$9.30$11.901,196,100
1991-01-23$9.04$11.57158,625
1991-01-22$8.89$11.38372,263
1991-01-21$9.19$11.76217,688
1991-01-18$9.44$12.09418,163
1991-01-17$10.22$13.08356,738
1991-01-16$9.96$12.7535,100
1991-01-15$10.00$12.8070,875
1991-01-14$10.11$12.9460,413
1991-01-11$10.19$13.04289,238
1991-01-10$10.22$13.08292,275
1991-01-09$10.26$13.13362,813
1991-01-08$10.22$13.0870,875
1991-01-07$10.26$13.1383,025
1991-01-04$10.26$13.1372,900
1991-01-03$10.37$13.27198,450
1991-01-02$10.26$13.13288,225