NYSE:AON | Market Cap | Aon plc

Historical market capitalization from contemporaneous retained split-adjusted close and filed split-adjusted shares outstanding.

Available history
2009-03-31 to 2026-09-03
Data captured

Historical Market Cap

DateMarket Cap
2026-09-03$69.4B
2026-07-28$80.87B
2026-04-30$66.56B
2026-02-12$67.38B
2025-10-30$70.54B
2025-07-24$76.89B
2025-04-24$78.83B
2025-02-14$83.59B
2024-10-24$77.17B
2024-07-25$64.94B
2024-04-25$66.53B
2024-02-16$61.72B
2023-10-26$64.01B
2023-07-27$68.38B
2023-04-27$67.99B
2023-02-16$63.65B
2022-10-27$58.4B
2022-07-28$61.75B
2022-04-28$67.54B
2022-02-17$60.13B
2021-10-28$70.74B
2021-07-29$59.55B
2021-04-29$53.99B
2021-02-18$51.36B
2020-10-29$42.71B
2020-07-30$48.05B
2020-04-30$39.9B
2020-02-13$54.32B
2019-10-24$44.8B
2019-07-25$46.43B
2019-04-25$43.2B
2019-02-15$41.27B
2018-10-25$36.12B
2018-07-26$35.96B
2018-05-03$34.23B
2018-02-16$34.68B
2017-10-26$37.79B
2017-08-03$35.35B
2017-05-08$32.18B
2017-02-22$30.36B
2016-10-20$28.95B
2016-07-21$29.02B
2016-04-21$27.34B
2016-02-05$25.08B
2015-12-31$24.88B
2015-10-22$25.31B
2015-09-30$24.27B
2015-07-23$28.44B
2015-06-30$27.89B
2015-03-31$27.08B
2015-01-31$25.24B
2014-12-31$26.55B
2014-09-30$24.99B
2014-06-30$26.17B
2014-03-31$24.99B
2014-01-31$24.23B
2013-12-31$25.23B
2013-09-30$22.41B
2013-06-30$19.79B
2013-03-31$19.01B
2013-01-31$17.99B
2012-12-31$17.29B
2012-09-30$16.66B
2012-06-30$15.08B
2012-04-02$16.07B
2012-03-31$16.01B
2012-01-31$15.75B
2011-12-31$15.18B
2011-09-30$13.57B
2011-06-30$16.76B
2011-03-31$17.5B
2011-01-31$15.24B
2010-12-31$15.29B
2010-09-30$10.59B
2010-06-30$10.01B
2010-03-31$11.51B
2010-01-29$10.38B
2009-12-31$10.21B
2009-09-30$11.14B
2009-06-30$10.4B
2009-03-31$11.3B