What is the current annual debt to equity of AON?

As of today, AON annual debt to equity is 1.72

What is 1-year change in AON annual debt to equity?

AON annual debt to equity is down -41.10% year-over-year

What is 3-year change in AON annual debt to equity?

AON annual debt to equity is up +107.79% over the past 3 years

How far is AON annual debt to equity from its all-time high?

AON annual debt to equity is currently -82.48% below its historical high of 9.82 set on December 31, 2021

How does AON annual debt to equity rank versus sector peers?

AON annual debt to equity is higher than 90.91% of companies in Financial Services sector

When is AON next annual earnings release?

The next annual earnings release for AON is on January 29, 2027

What is the current quarterly debt to equity of AON?

As of today, AON quarterly debt to equity is 2.87

What is AON quarterly debt to equity most recent change?

AON quarterly debt to equity was up +73.94% on September 30, 2026

What is 1-year change in AON quarterly debt to equity?

AON quarterly debt to equity is up +29.28% year-over-year

How far is AON quarterly debt to equity from its all-time high?

AON quarterly debt to equity is currently -98.47% below its historical high of 187.77 set on June 30, 2023

How does AON quarterly debt to equity rank versus sector peers?

AON quarterly debt to equity is higher than 95.21% of companies in Financial Services sector

When is AON next earnings release?

The next earnings release for AON is on January 29, 2027

Aon Plc (AON) Debt To Equity Ratio History & Chart

Annual Debt To Equity

1.721.20-41.10%

December 31, 2025

Summary

Current Value: As of today, AON annual debt to equity is 1.72, down -41.10% on December 31, 2025
Historical Performance: AON annual debt to equity is up +107.79% over the past 3 years, down -32.55% over the past 5 years
All-Time High Comparison: AON annual debt to equity is currently -82.48% below its historical high of 9.82 set on December 31, 2021
3-Year Low Comparison: AON annual debt to equity is +107.79% above its 3-year low of -22.07 reached on an earlier date
Sector Comparison: AON annual debt to equity is higher than 90.91% of companies in Financial Services sector

Debt To Equity Chart

Performance

AON Performance
Metric	Date	Value	1Y	3Y	5Y	15Y
Annual Debt To Equity	Dec 31, 25	1.72	-41.1%	+107.8%	-32.5%	+212.7%
Quarterly Debt To Equity	Sep 30, 26	2.87	+29.3%	+113.9%	-33.1%	+412.5%
Price	Oct 30, 26	$321.67	-2.0%	+4.2%	+0.6%	+570.3%
Annual Total Debt	Dec 31, 25	$16.07B	-10.2%	+37.6%	+80.1%	+256.7%
	Dec 31, 25	$9.35B	+52.8%	+1867.9%	+167.6%	+13.3%
	Dec 31, 25	1.11	+8.8%	+8.8%	+3.7%	-0.9%
	Dec 31, 25	1.11	+8.8%	+8.8%	+3.7%	-0.9%
	Dec 31, 25	$770.00M	-18.3%	-31.9%	+12.9%	+56.5%
	Dec 31, 25	$15.30B	-9.7%	+45.1%	+85.6%	+281.2%
	Sep 30, 26	6	-14.3%	-25.0%	0.0%	+20.0%
	Oct 30, 26	1.69	+9.0%	-5.1%	-23.5%	+25.2%

Debt To Equity Highs

AON Annual Debt To Equity Highs Comparison
Period	High	Date	Current
3Y	2.92	Dec 31, 24	-41.1%
5Y	9.82	Dec 31, 21	-82.5%
All	9.82	Dec 31, 21	-82.5%

Debt To Equity Lows

AON Annual Debt To Equity Lows Comparison
Period	Low	Date	Current
3Y	-22.07	N/A	+107.8%
5Y	-22.07	Dec 31, 22	+107.8%
All	-22.07	Dec 31, 22	+107.8%

Debt To Equity History

Year	Value	Change
2025	1.72	-41.1%
2024	2.92	+120.0%
2023	-14.57	+34.0%
2022	-22.07	-324.7%
2021	9.82	+285.1%
2020	2.55	+0.4%
2019	2.54	+64.9%
2018	1.54	+18.5%
2017	1.30	+12.1%
2016	1.16	+22.1%
2015	0.95	+11.8%
2014	0.85	+57.4%
2013	0.54	0.0%
2012	0.54	-3.6%
2011	0.56	+1.8%
2010	0.55	+48.6%
2009	0.37	0.0%
2008	0.37	+8.8%
2007	0.34	-22.7%
2006	0.44	+10.0%
2005	0.40	-2.4%
2004	0.41	-12.8%
2003	0.47	-25.4%

Year	Value	Change
2002	0.63	-18.2%
2001	0.77	-9.4%
2000	0.85	-3.4%
1999	0.88	+20.5%
1998	0.73	-5.2%
1997	0.77	+208.0%
1996	0.25	-24.2%
1995	0.33	-5.7%
1994	0.35	+6.1%
1993	0.33	+3.1%
1992	0.32	0.0%
1991	0.32	-13.5%
1990	0.37	-15.9%
1989	0.44	+10.0%
1988	0.40	-18.4%
1987	0.49	+25.6%
1986	0.39	+143.8%
1985	0.16	+33.3%
1984	0.12	-45.5%
1982	0.22	>+9,900.0%
1981	0.00	0.0%
1980	0.00	-

FAQ

What is the current annual debt to equity of AON?: As of today, AON annual debt to equity is 1.72
What is 1-year change in AON annual debt to equity?: AON annual debt to equity is down -41.10% year-over-year
What is 3-year change in AON annual debt to equity?: AON annual debt to equity is up +107.79% over the past 3 years
How far is AON annual debt to equity from its all-time high?: AON annual debt to equity is currently -82.48% below its historical high of 9.82 set on December 31, 2021
How does AON annual debt to equity rank versus sector peers?: AON annual debt to equity is higher than 90.91% of companies in Financial Services sector
When is AON next annual earnings release?: The next annual earnings release for AON is on January 29, 2027

Debt To Equity Formula

Debt To Equity =

Total Debt

Quarterly Debt To Equity

2.871.22+73.94%

September 30, 2026

Summary

Current Value: As of today, AON quarterly debt to equity is 2.87, up +73.94% on September 30, 2026
Historical Performance: AON quarterly debt to equity is up +29.28% year-over-year, up +113.91% over the past 3 years
All-Time High Comparison: AON quarterly debt to equity is currently -98.47% below its historical high of 187.77 set on June 30, 2023
3-Year Low Comparison: AON quarterly debt to equity is +102.20% above its 3-year low of -130.20 reached on March 31, 2024
Sector Comparison: AON quarterly debt to equity is higher than 95.21% of companies in Financial Services sector

Performance

AON Performance
Metric	Date	Value	3M	1Y	3Y	5Y
Quarterly Debt To Equity	Sep 30, 26	2.87	+73.9%	+29.3%	+113.9%	-33.1%
Annual Debt To Equity	Dec 31, 25	1.72	–	-41.1%	+107.8%	-32.5%
Price	Oct 30, 26	$321.67	-12.3%	-2.0%	+4.2%	+0.6%
Quarterly Total Debt	Sep 30, 26	$28.95B	+82.4%	+64.3%	+139.5%	+205.2%
	Sep 30, 26	$10.10B	+5.2%	+27.2%	+1823.7%	+357.3%
	Sep 30, 26	1.58	+53.4%	+49.1%	+54.9%	+47.7%
	Sep 30, 26	1.58	+53.4%	+49.1%	+54.9%	+47.7%
	Sep 30, 26	$1.90B	-13.6%	-0.7%	+29.7%	+417.2%
	Sep 30, 26	$27.05B	+97.8%	+72.2%	+154.6%	+196.7%
	Sep 30, 26	6	0.0%	-14.3%	-25.0%	0.0%
	Oct 30, 26	1.69	-8.2%	+9.0%	-5.1%	-23.5%

Quarterly Debt To Equity Highs

AON Quarterly Debt To Equity Highs Comparison
Period	High	Date	Current
1Y	2.87	Sep 30, 26	at high
3Y	3.16	Jun 30, 24	-9.2%
5Y	187.77	Jun 30, 23	-98.5%
All	187.77	Jun 30, 23	-98.5%

Quarterly Debt To Equity Lows

AON Quarterly Debt To Equity Lows Comparison
Period	Low	Date	Current
1Y	1.57	Mar 31, 26	+82.8%
3Y	-130.20	Mar 31, 24	+102.2%
5Y	-174.84	Mar 31, 23	+101.6%
All	-174.84	Mar 31, 23	+101.6%

Quarterly Debt To Equity History

Month	Value	Change
Sep 2026	2.87	+73.9%
Jun 2026	1.65	+5.1%
Mar 2026	1.57	-8.7%
Dec 2025	1.72	-22.5%
Sep 2025	2.22	-4.3%
Jun 2025	2.32	-12.1%
Mar 2025	2.64	-9.6%
Dec 2024	2.92	+1.4%
Sep 2024	2.88	-8.9%
Jun 2024	3.16	+102.4%
Mar 2024	-130.20	-793.6%
Dec 2023	-14.57	+29.4%
Sep 2023	-20.63	-111.0%
Jun 2023	187.77	+207.4%
Mar 2023	-174.84	-692.2%
Dec 2022	-22.07	-47.6%
Sep 2022	-14.95	-190.2%
Jun 2022	16.57	+73.1%
Mar 2022	9.57	-2.5%
Dec 2021	9.82	+128.9%
Sep 2021	4.29	+128.2%
Jun 2021	1.88	-4.6%
Mar 2021	1.97	-22.7%
Dec 2020	2.55	+1.2%
Sep 2020	2.52	-1.9%
Jun 2020	2.57	-12.3%
Mar 2020	2.93	+15.4%
Dec 2019	2.54	+4.5%
Sep 2019	2.43	+5.7%
Jun 2019	2.30	+42.9%
Mar 2019	1.61	+4.5%
Dec 2018	1.54	+2.7%
Sep 2018	1.50	+5.6%
Jun 2018	1.42	+23.5%
Mar 2018	1.15	-11.5%
Dec 2017	1.30	+13.0%
Sep 2017	1.15	+6.5%
Jun 2017	1.08	-0.9%
Mar 2017	1.09	-6.0%
Dec 2016	1.16	+2.7%
Sep 2016	1.13	+0.9%
Jun 2016	1.12	-10.4%
Mar 2016	1.25	+31.6%
Dec 2015	0.95	-8.7%
Sep 2015	1.04	+9.5%
Jun 2015	0.95	+6.7%
Mar 2015	0.89	+4.7%
Dec 2014	0.85	+11.8%
Sep 2014	0.76	-1.3%
Jun 2014	0.77	+28.3%
Mar 2014	0.60	+11.1%
Dec 2013	0.54	-11.5%
Sep 2013	0.61	+3.4%
Jun 2013	0.59	-1.7%
Mar 2013	0.60	+11.1%
Dec 2012	0.54	+1.9%
Sep 2012	0.53	-3.6%
Jun 2012	0.55	+3.8%
Mar 2012	0.53	-5.4%
Dec 2011	0.56	0.0%
Sep 2011	0.56	+3.7%
Jun 2011	0.54	-6.9%
Mar 2011	0.58	+5.5%
Dec 2010	0.55	-15.4%
Sep 2010	0.65	+80.6%
Jun 2010	0.36	-7.7%
Mar 2010	0.39	+5.4%
Dec 2009	0.37	+8.8%
Sep 2009	0.34	+3.0%
Jun 2009	0.33	-5.7%
Mar 2009	0.35	-5.4%
Dec 2008	0.37	+12.1%
Sep 2008	0.33	+6.5%
Jun 2008	0.31	-3.1%
Mar 2008	0.32	-5.9%
Dec 2007	0.34	-5.6%
Sep 2007	0.36	-12.2%

Month	Value	Change
Jun 2007	0.41	+5.1%
Mar 2007	0.39	-11.4%
Dec 2006	0.44	0.0%
Sep 2006	0.44	+12.8%
Jun 2006	0.39	+2.6%
Mar 2006	0.38	-5.0%
Dec 2005	0.40	+14.3%
Sep 2005	0.35	0.0%
Jun 2005	0.35	-12.5%
Mar 2005	0.40	-2.4%
Dec 2004	0.41	+2.5%
Sep 2004	0.40	-7.0%
Jun 2004	0.43	0.0%
Mar 2004	0.43	-8.5%
Dec 2003	0.47	+56.7%
Sep 2003	0.30	-14.3%
Jun 2003	0.35	+2.9%
Mar 2003	0.34	-46.0%
Dec 2002	0.63	-20.3%
Sep 2002	0.79	+1.3%
Jun 2002	0.78	0.0%
Mar 2002	0.78	+1.3%
Dec 2001	0.77	+6.9%
Sep 2001	0.72	-7.7%
Jun 2001	0.78	0.0%
Mar 2001	0.78	-8.2%
Dec 2000	0.85	+25.0%
Sep 2000	0.68	-29.2%
Jun 2000	0.96	+10.3%
Mar 2000	0.87	-1.1%
Dec 1999	0.88	+2.3%
Sep 1999	0.86	+7.5%
Jun 1999	0.80	+2.6%
Mar 1999	0.78	+6.8%
Dec 1998	0.73	-8.8%
Sep 1998	0.80	+3.9%
Jun 1998	0.77	+8.5%
Mar 1998	0.71	-7.8%
Dec 1997	0.77	>+9,900.0%
Sep 1997	0.00	0.0%
Jun 1997	0.00	0.0%
Mar 1997	0.00	-100.0%
Dec 1996	0.25	>+9,900.0%
Sep 1996	0.00	0.0%
Jun 1996	0.00	0.0%
Mar 1996	0.00	-100.0%
Dec 1995	0.33	>+9,900.0%
Sep 1995	0.00	0.0%
Jun 1995	0.00	0.0%
Mar 1995	0.00	-100.0%
Dec 1994	0.33	+3.1%
Sep 1994	0.32	+10.3%
Jun 1994	0.29	0.0%
Mar 1994	0.29	-3.3%
Dec 1993	0.30	-6.3%
Sep 1993	0.32	+3.2%
Jun 1993	0.31	0.0%
Mar 1993	0.31	+10.7%
Dec 1992	0.28	+3.7%
Sep 1992	0.27	0.0%
Jun 1992	0.27	+12.5%
Mar 1992	0.24	-11.1%
Dec 1991	0.27	-20.6%
Sep 1991	0.34	+13.3%
Jun 1991	0.30	-16.7%
Mar 1991	0.36	+16.1%
Dec 1990	0.31	-29.5%
Sep 1990	0.44	+29.4%
Jun 1990	0.34	0.0%
Mar 1990	0.34	+9.7%
Dec 1989	0.31	+3.3%
Dec 1988	0.30	-23.1%
Dec 1987	0.39	+69.6%
Dec 1986	0.23	+155.6%
Dec 1985	0.09	+125.0%
Dec 1984	0.04	-

FAQ

What is the current quarterly debt to equity of AON?: As of today, AON quarterly debt to equity is 2.87
What is AON quarterly debt to equity most recent change?: AON quarterly debt to equity was up +73.94% on September 30, 2026
What is 1-year change in AON quarterly debt to equity?: AON quarterly debt to equity is up +29.28% year-over-year
How far is AON quarterly debt to equity from its all-time high?: AON quarterly debt to equity is currently -98.47% below its historical high of 187.77 set on June 30, 2023
How does AON quarterly debt to equity rank versus sector peers?: AON quarterly debt to equity is higher than 95.21% of companies in Financial Services sector
When is AON next earnings release?: The next earnings release for AON is on January 29, 2027

Debt To Equity Formula

Debt To Equity =

Total Debt

Data Sources & References

AON Official Website www.aon.com
Most Recent Annual Report (10-K) www.sec.gov/Archives/edgar/data/315293/000162828026004273/0001628280-26-004273-index.htm
AON Profile on Yahoo Finance finance.yahoo.com/quote/AON
AON Profile on NASDAQ.com www.nasdaq.com/market-activity/stocks/aon