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 — 1989

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1989-12-29$12.52$15.35130,613
1989-12-28$12.44$15.2674,250
1989-12-27$12.81$15.71191,363
1989-12-26$11.96$14.67145,125
1989-12-22$11.85$14.53241,313
1989-12-21$11.74$14.39699,975
1989-12-20$11.48$14.08508,950
1989-12-19$11.67$14.30351,000
1989-12-18$12.07$14.80651,375
1989-12-15$12.04$14.76265,275
1989-12-14$12.15$14.89218,363
1989-12-13$12.22$14.99390,825
1989-12-12$12.07$14.80320,963
1989-12-11$12.00$14.71337,838
1989-12-08$12.11$14.85392,513
1989-12-07$12.33$15.12109,688
1989-12-06$12.48$15.30784,013
1989-12-05$12.48$15.30214,988
1989-12-04$12.07$14.8093,488
1989-12-01$11.74$14.39406,013
1989-11-30$11.52$14.12223,088
1989-11-29$11.52$14.12270,338
1989-11-28$11.52$14.12757,013
1989-11-27$11.41$13.99547,425
1989-11-24$11.44$14.03177,863
1989-11-22$11.44$14.03275,400
1989-11-21$11.52$14.12156,600
1989-11-20$11.41$13.99173,138
1989-11-17$11.56$14.1767,163
1989-11-16$11.59$14.2193,150
1989-11-15$11.41$13.99179,550
1989-11-14$11.30$13.85164,363
1989-11-13$11.26$13.80240,975
1989-11-10$11.07$13.58147,825
1989-11-09$10.96$13.4479,313
1989-11-08$10.96$13.44234,225
1989-11-07$10.85$13.31252,788
1989-11-06$10.81$13.26136,688
1989-11-03$10.70$13.12558,900
1989-11-02$10.67$13.08829,238
1989-11-01$10.67$13.08761,400
1989-10-31$10.59$12.86571,725
1989-10-30$10.63$12.90220,050
1989-10-27$10.74$13.04253,800
1989-10-26$10.89$13.22140,738
1989-10-25$10.96$13.31217,688
1989-10-24$10.78$13.08120,150
1989-10-23$10.93$13.26178,200
1989-10-20$10.85$13.17366,863
1989-10-19$10.67$12.95378,675
1989-10-18$10.26$12.46226,800
1989-10-17$10.00$12.14244,688
1989-10-16$10.07$12.23256,500
1989-10-13$10.30$12.50325,013
1989-10-12$10.56$12.82247,725
1989-10-11$10.67$12.95104,288
1989-10-10$10.67$12.9555,350
1989-10-09$10.63$12.9027,338
1989-10-06$10.74$13.0480,663
1989-10-05$10.59$12.8669,525
1989-10-04$10.56$12.82170,100
1989-10-03$10.63$12.90334,800
1989-10-02$10.26$12.46181,575
1989-09-29$10.15$12.32273,375
1989-09-28$10.04$12.19335,475
1989-09-27$10.04$12.19847,800
1989-09-26$10.19$12.37543,038
1989-09-25$10.22$12.41152,888
1989-09-22$10.37$12.59322,988
1989-09-21$10.52$12.77838,013
1989-09-20$10.33$12.55712,463
1989-09-19$10.19$12.37256,163
1989-09-18$10.19$12.37179,213
1989-09-15$10.19$12.37162,338
1989-09-14$10.15$12.32423,225
1989-09-13$10.22$12.41207,225
1989-09-12$10.30$12.50182,925
1989-09-11$10.22$12.41105,638
1989-09-08$10.37$12.59290,925
1989-09-07$10.52$12.77116,100
1989-09-06$10.37$12.59550,463
1989-09-05$10.33$12.55168,413
1989-09-01$10.37$12.59315,563
1989-08-31$10.33$12.55257,850
1989-08-30$10.48$12.7336,450
1989-08-29$10.41$12.64123,525
1989-08-28$10.44$12.6899,225
1989-08-25$10.59$12.86152,213
1989-08-24$10.74$13.04302,738
1989-08-23$10.59$12.8660,413
1989-08-22$10.59$12.86343,913
1989-08-21$10.59$12.86237,600
1989-08-18$10.67$12.95152,550
1989-08-17$10.63$12.90299,700
1989-08-16$10.70$12.99161,663
1989-08-15$10.70$12.99150,188
1989-08-14$10.74$13.04136,688
1989-08-11$10.81$13.13258,863
1989-08-10$10.85$13.1720,925
1989-08-09$10.78$13.0862,775
1989-08-08$10.89$13.22271,013
1989-08-07$10.81$13.13199,125
1989-08-04$10.78$13.08327,375
1989-08-03$10.81$13.13470,813
1989-08-02$10.85$13.1796,188
1989-08-01$10.74$12.91116,438
1989-07-31$10.78$12.9689,438
1989-07-28$10.67$12.82119,475
1989-07-27$10.59$12.74327,038
1989-07-26$10.52$12.65103,950
1989-07-25$10.59$12.74227,813
1989-07-24$10.70$12.87123,525
1989-07-21$10.74$12.9179,988
1989-07-20$10.81$13.00164,025
1989-07-19$11.26$13.54248,063
1989-07-18$10.85$13.05145,125
1989-07-17$10.96$13.18111,375
1989-07-14$10.96$13.18167,400
1989-07-13$10.93$13.14133,988
1989-07-12$10.93$13.14221,738
1989-07-11$10.96$13.18395,888
1989-07-10$10.93$13.14304,088
1989-07-07$10.74$12.91345,938
1989-07-06$10.52$12.65252,450
1989-07-05$10.44$12.56112,050
1989-07-03$10.56$12.69143,438
1989-06-30$10.74$12.91226,125
1989-06-29$10.56$12.69206,213
1989-06-28$10.59$12.7497,875
1989-06-27$10.52$12.6583,025
1989-06-26$10.48$12.6044,888
1989-06-23$10.52$12.65150,188
1989-06-22$10.33$12.42325,350
1989-06-21$10.22$12.29132,300
1989-06-20$10.15$12.20204,525
1989-06-19$10.19$12.25180,563
1989-06-16$10.30$12.38168,750
1989-06-15$10.26$12.34239,625
1989-06-14$10.30$12.38304,763
1989-06-13$10.22$12.29119,475
1989-06-12$10.30$12.3831,050
1989-06-09$10.26$12.34181,575
1989-06-08$10.30$12.38336,150
1989-06-07$10.22$12.29269,325
1989-06-06$10.26$12.34173,475
1989-06-05$10.22$12.29205,875
1989-06-02$10.19$12.2546,238
1989-06-01$10.15$12.2065,813
1989-05-31$10.07$12.11259,538
1989-05-30$10.07$12.11103,275
1989-05-26$10.04$12.07434,700
1989-05-25$10.04$12.0795,175
1989-05-24$10.04$12.07123,863
1989-05-23$9.96$11.98261,900
1989-05-22$10.00$12.02481,613
1989-05-19$9.89$11.891,021,275
1989-05-18$10.00$12.02681,750
1989-05-17$10.11$12.16283,838
1989-05-16$10.11$12.16356,063
1989-05-15$10.00$12.02266,963
1989-05-12$9.70$11.67522,113
1989-05-11$9.52$11.44307,800
1989-05-10$9.26$11.13175,500
1989-05-09$9.19$11.0474,588
1989-05-08$9.22$11.0932,063
1989-05-05$9.26$11.13162,675
1989-05-04$9.37$11.2747,250
1989-05-03$9.30$11.18345,263
1989-05-02$9.33$11.10110,025
1989-05-01$9.33$11.1060,750
1989-04-28$9.48$11.27276,750
1989-04-27$9.52$11.3270,200
1989-04-26$9.52$11.32239,963
1989-04-25$9.67$11.49115,425
1989-04-24$9.59$11.4183,025
1989-04-21$9.74$11.58210,600
1989-04-20$9.59$11.41110,363
1989-04-19$9.70$11.54174,488
1989-04-18$9.85$11.71226,463
1989-04-17$9.59$11.41127,913
1989-04-14$9.56$11.36139,725
1989-04-13$9.48$11.27238,950
1989-04-12$9.56$11.36122,513
1989-04-11$9.48$11.27117,788
1989-04-10$9.56$11.36245,363
1989-04-07$9.48$11.27668,250
1989-04-06$9.22$10.96440,438
1989-04-05$8.96$10.66223,425
1989-04-04$8.93$10.61246,038
1989-04-03$9.00$10.70428,963
1989-03-31$8.85$10.52466,425
1989-03-30$8.81$10.48140,063
1989-03-29$8.78$10.44159,638
1989-03-28$8.74$10.39416,813
1989-03-27$8.67$10.30126,900
1989-03-23$8.67$10.30207,563
1989-03-22$8.59$10.22166,050
1989-03-21$8.52$10.13162,000
1989-03-20$8.44$10.04174,150
1989-03-17$8.48$10.08179,213
1989-03-16$8.70$10.35107,325
1989-03-15$8.63$10.26208,913
1989-03-14$8.59$10.2298,550
1989-03-13$8.48$10.0884,713
1989-03-10$8.56$10.1779,313
1989-03-09$8.52$10.1383,363
1989-03-08$8.52$10.1367,163
1989-03-07$8.59$10.22134,325
1989-03-06$8.63$10.26125,888
1989-03-03$8.63$10.26205,875
1989-03-02$8.67$10.30122,513
1989-03-01$8.41$10.00190,013
1989-02-28$8.41$10.00149,175
1989-02-27$8.41$10.00262,913
1989-02-24$8.59$10.22177,863
1989-02-23$8.56$10.17105,975
1989-02-22$8.59$10.2297,200
1989-02-21$8.56$10.17125,888
1989-02-17$8.59$10.2271,213
1989-02-16$8.67$10.30207,563
1989-02-15$8.48$10.0840,838
1989-02-14$8.33$9.91172,125
1989-02-13$8.37$9.95122,175
1989-02-10$8.44$10.04217,350
1989-02-09$8.56$10.17141,075
1989-02-08$8.48$10.08190,350
1989-02-07$8.44$10.04162,000
1989-02-06$8.44$10.04144,450
1989-02-03$8.37$9.95205,875
1989-02-02$8.37$9.95156,938
1989-02-01$8.30$9.75165,038
1989-01-31$8.44$9.93460,688
1989-01-30$8.41$9.88259,200
1989-01-27$8.44$9.93290,588
1989-01-26$8.22$9.66132,975
1989-01-25$8.19$9.6270,875
1989-01-24$8.22$9.6649,950
1989-01-23$8.30$9.7585,050
1989-01-20$8.26$9.7175,600
1989-01-19$8.26$9.71257,850
1989-01-18$8.22$9.6687,413
1989-01-17$8.22$9.66142,763
1989-01-16$8.30$9.75139,725
1989-01-13$8.26$9.71504,900
1989-01-12$8.44$9.93306,788
1989-01-11$8.41$9.8846,575
1989-01-10$8.48$9.97215,325
1989-01-09$8.59$10.10252,113
1989-01-06$8.22$9.6675,263
1989-01-05$8.26$9.71732,038
1989-01-04$8.04$9.45266,963
1989-01-03$8.19$9.62182,588