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 — 1999

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
1999-12-31$40.00$67.50432,700——
1999-12-30$39.88$67.29502,900——
1999-12-29$40.06$67.61267,100——
1999-12-28$40.19$67.82660,400——
1999-12-27$40.25$67.93485,600——
1999-12-23$40.13$67.72903,400——
1999-12-22$39.69$66.98678,500——
1999-12-21$39.50$66.66992,400——
1999-12-20$39.38$66.451,822,500——
1999-12-17$37.94$64.021,624,600——
1999-12-16$34.94$58.96691,400——
1999-12-15$33.88$57.17330,000——
1999-12-14$35.06$59.17657,900——
1999-12-13$35.13$59.28382,300——
1999-12-10$35.00$59.07416,500——
1999-12-09$34.63$58.43441,300——
1999-12-08$34.44$58.12346,300——
1999-12-07$35.06$59.17587,400——
1999-12-06$35.06$59.17360,200——
1999-12-03$35.75$60.33776,400——
1999-12-02$35.31$59.59427,000——
1999-12-01$35.64$60.15477,100——
1999-11-30$35.69$60.23496,300——
1999-11-29$35.81$60.441,085,500——
1999-11-26$37.25$62.86438,200——
1999-11-24$38.19$64.45805,000——
1999-11-23$38.13$64.34865,000——
1999-11-22$37.00$62.44477,300——
1999-11-19$37.00$62.44273,500——
1999-11-18$38.00$64.13729,200——
1999-11-17$38.50$64.97553,300——
1999-11-16$39.81$67.19526,200——
1999-11-15$38.94$65.71321,200——
1999-11-12$38.69$65.29592,200——
1999-11-11$37.63$63.50637,700——
1999-11-10$38.50$64.971,170,600——
1999-11-09$38.31$64.661,205,900——
1999-11-08$39.56$66.771,326,400——
1999-11-05$40.00$67.502,278,600——
1999-11-04$35.88$60.541,475,200——
1999-11-03$34.31$57.911,502,900——
1999-11-02$34.19$57.702,341,600——
1999-11-01$34.63$58.43663,600——
1999-10-29$35.50$59.912,230,900——
1999-10-28$36.06$60.501,101,500——
1999-10-27$33.75$56.631,324,600——
1999-10-26$33.44$56.101,316,400——
1999-10-25$32.69$54.841,381,100——
1999-10-22$31.75$53.272,130,600——
1999-10-21$28.69$48.13415,000——
1999-10-20$28.50$47.82536,700——
1999-10-19$28.19$47.29607,700——
1999-10-18$27.88$46.77537,900——
1999-10-15$26.94$45.201,042,400——
1999-10-14$27.56$46.241,009,200——
1999-10-13$27.31$45.82628,200——
1999-10-12$27.75$46.56991,800——
1999-10-11$28.38$47.611,134,200——
1999-10-08$28.94$48.551,500,700——
1999-10-07$29.25$49.08931,700——
1999-10-06$29.75$49.911,278,100——
1999-10-05$28.63$48.03538,200——
1999-10-04$28.75$48.24783,500——
1999-10-01$28.44$47.711,230,600——
1999-09-30$29.56$49.60928,300——
1999-09-29$29.63$49.70561,100——
1999-09-28$29.63$49.70977,400——
1999-09-27$30.13$50.54333,000——
1999-09-24$30.13$50.54875,700——
1999-09-23$30.25$50.751,392,400——
1999-09-22$31.25$52.431,073,800——
1999-09-21$31.81$53.37594,000——
1999-09-20$32.69$54.84653,300——
1999-09-17$32.69$54.84794,000——
1999-09-16$32.69$54.84837,400——
1999-09-15$32.94$55.261,178,500——
1999-09-14$33.38$56.00571,400——
1999-09-13$33.69$56.52309,400——
1999-09-10$33.94$56.94517,600——
1999-09-09$33.13$55.58648,200——
1999-09-08$33.56$56.31239,500——
1999-09-07$34.13$57.25197,600——
1999-09-03$34.56$57.99764,900——
1999-09-02$33.31$55.89293,400——
1999-09-01$33.88$56.83784,300——
1999-08-31$33.38$56.00462,300——
1999-08-30$34.06$57.15328,900——
1999-08-27$35.50$59.56240,100——
1999-08-26$36.69$61.55187,000——
1999-08-25$36.94$61.97300,100——
1999-08-24$36.69$61.55292,100——
1999-08-23$36.75$61.66271,100——
1999-08-20$35.63$59.77334,900——
1999-08-19$35.69$59.88457,400——
1999-08-18$36.19$60.71403,900——
1999-08-17$36.38$61.03275,200——
1999-08-16$36.38$61.03329,600——
1999-08-13$36.31$60.92267,000——
1999-08-12$35.81$60.09416,600——
1999-08-11$35.88$60.19217,400——
1999-08-10$35.31$59.25510,000——
1999-08-09$36.00$60.40357,100——
1999-08-06$35.44$59.46563,500——
1999-08-05$36.56$61.34777,800——
1999-08-04$35.50$59.56438,300——
1999-08-03$35.50$59.561,165,900——
1999-08-02$36.75$61.66289,300——
1999-07-30$37.44$62.81342,000——
1999-07-29$37.81$63.09285,200——
1999-07-28$38.56$64.34505,300——
1999-07-27$39.38$65.70456,000——
1999-07-26$39.06$65.17517,200——
1999-07-23$38.94$64.97860,500——
1999-07-22$40.00$66.74652,900——
1999-07-21$40.75$67.99228,400——
1999-07-20$41.25$68.82208,400——
1999-07-19$42.13$70.28376,400——
1999-07-16$42.13$70.28398,100——
1999-07-15$41.06$68.51184,300——
1999-07-14$41.00$68.41169,900——
1999-07-13$41.25$68.82112,000——
1999-07-12$41.63$69.45145,800——
1999-07-09$42.44$70.81286,100——
1999-07-08$41.38$69.03170,100——
1999-07-07$41.75$69.66259,700——
1999-07-06$41.69$69.55252,100——
1999-07-02$41.31$68.93225,000——
1999-07-01$40.69$67.89626,800——
1999-06-30$41.25$68.82300,700——
1999-06-29$41.38$69.03310,800——
1999-06-28$40.75$67.99321,000——
1999-06-25$40.00$66.74473,200——
1999-06-24$40.81$68.09554,300——
1999-06-23$40.13$66.95569,600——
1999-06-22$41.06$68.51611,200——
1999-06-21$41.50$69.24599,200——
1999-06-18$42.56$71.01693,000——
1999-06-17$42.50$70.91366,200——
1999-06-16$42.81$71.43431,600——
1999-06-15$42.88$71.54132,100——
1999-06-14$43.13$71.95227,400——
1999-06-11$42.00$70.08467,800——
1999-06-10$42.88$71.54321,800——
1999-06-09$42.75$71.33358,600——
1999-06-08$43.13$71.95381,000——
1999-06-07$43.25$72.16295,200——
1999-06-04$42.88$71.54353,600——
1999-06-03$42.00$70.08509,300——
1999-06-02$42.25$70.49252,700——
1999-06-01$42.31$70.60481,700——
1999-05-28$43.00$71.74396,200——
1999-05-27$42.00$70.08453,700——
1999-05-26$44.00$73.41407,300——
1999-05-25$43.13$71.95629,000——
1999-05-24$43.19$72.061,343,500——
1999-05-21$43.88$73.20776,500——
1999-05-20$44.06$73.52493,600——
1999-05-19$44.50$74.25481,100——
1999-05-18$44.19$73.73596,500——
1999-05-17$44.58$74.39652,800——
1999-05-14$44.63$74.46622,050——
1999-05-13$45.96$76.68347,100——
1999-05-12$45.88$76.54475,950——
1999-05-11$45.58$76.05848,100——
1999-05-10$44.75$74.66307,950——
1999-05-07$44.46$74.18578,400——
1999-05-06$43.88$73.201,067,400——
1999-05-05$44.50$74.251,597,950——
1999-05-04$44.75$74.66717,150——
1999-05-03$45.96$76.68397,650——
1999-04-30$45.67$76.191,081,650——
1999-04-29$46.08$76.541,020,450——
1999-04-28$45.29$75.23639,000——
1999-04-27$44.42$73.78504,000——
1999-04-26$43.83$72.81286,650——
1999-04-23$44.33$73.64430,350——
1999-04-22$43.96$73.01953,100——
1999-04-21$43.42$72.11377,100——
1999-04-20$42.96$71.35444,450——
1999-04-19$43.21$71.771,091,850——
1999-04-16$43.50$72.25624,900——
1999-04-15$43.71$72.60521,250——
1999-04-14$44.00$73.08472,350——
1999-04-13$43.96$73.01491,400——
1999-04-12$44.33$73.64959,250——
1999-04-09$43.46$72.18554,700——
1999-04-08$43.63$72.46322,350——
1999-04-07$43.33$71.98554,250——
1999-04-06$43.50$72.25820,650——
1999-04-05$44.00$73.08441,150——
1999-04-01$42.96$71.35588,900——
1999-03-31$42.17$70.04406,350——
1999-03-30$42.54$70.66336,450——
1999-03-29$43.58$72.39202,500——
1999-03-26$43.17$71.70338,850——
1999-03-25$43.88$72.88595,200——
1999-03-24$43.08$71.56897,150——
1999-03-23$43.13$71.63987,600——
1999-03-22$43.83$72.81676,050——
1999-03-19$43.88$72.881,635,000——
1999-03-18$44.08$73.22333,150——
1999-03-17$44.08$73.22348,750——
1999-03-16$44.63$74.12708,000——
1999-03-15$45.08$74.88738,600——
1999-03-12$43.83$72.81918,450——
1999-03-11$43.25$71.84449,700——
1999-03-10$42.67$70.87542,850——
1999-03-09$41.83$69.48348,450——
1999-03-08$41.92$69.62422,550——
1999-03-05$42.67$70.87796,650——
1999-03-04$41.96$69.69797,700——
1999-03-03$40.63$67.48586,500——
1999-03-02$39.79$66.09609,900——
1999-03-01$39.33$65.33487,050——
1999-02-26$39.29$65.26486,300——
1999-02-25$39.42$65.47417,450——
1999-02-24$39.00$64.78441,300——
1999-02-23$40.17$66.72529,500——
1999-02-22$39.92$66.30617,250——
1999-02-19$38.79$64.43753,900——
1999-02-18$39.63$65.82502,950——
1999-02-17$39.42$65.47902,850——
1999-02-16$39.04$64.85858,150——
1999-02-12$37.42$62.15845,250——
1999-02-11$36.79$61.113,735,750——
1999-02-10$36.00$59.802,718,300——
1999-02-09$33.33$55.37485,250——
1999-02-08$33.33$55.37412,200——
1999-02-05$33.38$55.44336,000——
1999-02-04$33.54$55.40489,450——
1999-02-03$33.58$55.47664,950——
1999-02-02$33.17$54.78491,700——
1999-02-01$33.50$55.33423,750——
1999-01-29$33.83$55.88458,250——
1999-01-28$33.92$56.02529,500——
1999-01-27$34.29$56.64327,600——
1999-01-26$34.75$57.40273,750——
1999-01-25$34.88$57.60611,850——
1999-01-22$34.88$57.60266,250——
1999-01-21$35.21$58.15343,650——
1999-01-20$36.13$59.67269,400——
1999-01-19$36.54$60.36325,800——
1999-01-15$36.71$60.631,053,450——
1999-01-14$36.21$59.81674,400——
1999-01-13$36.25$59.88894,900——
1999-01-12$36.67$60.562,526,900——
1999-01-11$36.42$60.15601,650——
1999-01-08$37.17$61.39806,850——
1999-01-07$36.96$61.05706,950——
1999-01-06$37.33$61.661,086,750——
1999-01-05$37.58$62.08612,150——
1999-01-04$37.21$61.46804,450——