Aon plc Class A Ordinary Shares (Ireland) AON
Open calendar →Aon plc Class A Ordinary Shares (Ireland) · Company · NYSE
USD closing-price chart (daily close from yfinance · Last year)
USD 354.22 → 352.33 · -0.5%
Numbered dotted lines mark the filtered filings under Announcement Events below.
Price & SEC Filing History 22 Jul 2025 — 23 Jul 2026 (Last year)
Daily NYSE prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.
Date
Open
High
Low
Close
Volume
No data yet
359.6500
358.8000
350.9600
352.3300
1,184,811
359.0800
363.0000
354.8000
359.4000
1,371,200
364.8700
366.0000
361.1100
362.7800
1,074,100
Weekend
Weekend
370.0000
375.9200
365.6300
367.2100
1,445,600
358.2300
368.6400
356.5600
368.6300
1,017,900
357.5200
360.2900
350.4600
355.1500
1,193,600
364.2900
365.7800
358.4000
358.8900
1,168,300
360.1200
367.5800
360.1200
367.3500
1,511,700
Weekend
Weekend
357.5500
360.0000
353.7900
356.9400
998,600
354.9800
357.5000
353.1000
355.5600
602,000
360.0000
361.1300
357.0000
357.5100
641,700
360.0000
366.4500
357.0700
359.8200
830,200
356.7100
357.1800
351.3800
356.9100
1,218,000
Weekend
Weekend
No trading
18 · S-3ASR
After-hours · 17:15 ET
S-3ASR ↗
346.4100
357.5400
344.2000
357.4600
1,183,000
17 · 8-K
After-hours · 16:49 ET
8-K ↗
327.8300
347.2700
327.8300
343.5600
1,913,700
327.0700
333.7600
322.2600
331.6900
1,588,800
324.9700
330.4300
323.4100
327.5700
1,387,400
Weekend
Weekend
319.7200
330.3600
316.8200
328.6900
5,288,300
324.4900
328.4600
315.7800
315.9500
1,744,200
322.5900
328.2400
319.2200
325.4800
2,362,200
318.2900
323.5700
316.6900
320.7400
2,626,900
316.5100
319.7500
313.6200
313.6300
2,131,300
Weekend
Weekend
No trading
327.8600
328.0000
317.4800
317.7400
2,382,900
327.0200
334.7900
325.0000
326.6900
1,751,100
330.8000
333.1500
329.1300
331.4500
1,751,400
336.7100
338.2100
327.9800
329.5100
1,405,800
Weekend
Weekend
335.0000
338.2000
330.8100
335.3100
1,377,900
334.3900
340.1000
334.3900
335.1700
1,431,100
334.4800
340.7600
331.0000
336.3300
1,749,500
324.8700
333.0700
321.5500
331.5900
1,956,200
325.4900
328.8300
323.7800
325.8500
1,470,300
Weekend
Weekend
325.0000
331.1300
324.1200
328.5300
1,341,000
321.1700
327.9000
318.8100
322.2400
1,579,700
316.1600
317.0400
311.0700
315.6000
1,617,800
317.5800
319.3500
312.3400
317.8600
1,051,200
313.7800
321.4200
313.2300
320.4100
1,431,600
Weekend
Weekend
317.7700
317.8300
314.5400
316.0600
2,856,900
320.0300
322.0900
316.0300
318.3000
1,350,700
321.0900
325.6000
317.4900
318.5400
1,073,700
326.2700
326.3800
318.4800
319.2900
1,411,400
No trading
Weekend
Weekend
323.2800
325.4000
320.6500
324.7800
929,000
318.7100
325.2700
315.0000
324.2200
946,500
323.6000
323.6000
316.9000
321.1500
1,479,300
328.1600
330.2200
322.2600
323.6600
2,140,600
317.5100
328.4800
317.5100
326.5700
1,455,600
Weekend
Weekend
316.2400
321.6900
316.2400
317.2200
1,955,300
311.6100
317.2600
311.6100
315.4100
1,844,800
313.6200
315.4900
308.5100
310.9000
1,672,400
313.8900
317.5900
310.6300
316.3500
1,622,700
312.4200
314.8500
309.8700
312.0700
1,166,100
Weekend
Weekend
313.0000
314.0600
309.2200
312.7900
1,179,200
307.1900
315.9000
306.5200
313.5900
1,858,900
316.4100
317.4900
306.8700
308.2700
1,476,900
313.6700
315.4100
308.9900
314.5500
1,177,100
309.9300
316.5600
308.5700
314.9200
1,382,000
Weekend
Weekend
16 · 10-Q
After-hours · 16:07 ET
10-Q ↗
326.5200
326.5200
310.7300
311.5100
1,822,700
15 · 8-K
Pre-market · 06:34 ET
8-K ↗
312.4300
314.0200
307.0200
311.6500
2,614,600
319.8900
323.1200
319.1100
322.4900
1,156,800
14 · DEFA14A
After-hours · 16:55 ET
DEFA14A ↗
13 · DEF 14A
After-hours · 16:50 ET
DEF 14A ↗
326.7300
328.9500
320.5200
321.6800
1,312,200
319.5300
325.9500
319.0000
323.7800
1,248,900
Weekend
Weekend
322.4200
323.7900
318.6400
321.1400
761,200
326.3500
328.1300
321.6000
323.5600
941,300
333.8000
334.9200
324.2800
326.8600
1,281,900
332.9300
336.8900
331.7500
335.3200
1,215,000
331.4500
334.3500
330.9100
331.9500
792,200
Weekend
Weekend
333.2700
336.3500
331.4300
331.8000
1,161,400
329.8700
337.9800
328.2700
335.3400
1,350,000
323.8000
329.2900
321.7500
328.0800
1,093,700
321.7500
324.4300
320.9500
323.0200
1,270,500
315.0000
325.6800
313.0000
325.4000
1,687,500
Weekend
Weekend
323.1600
323.2900
307.8100
312.5700
2,414,200
326.5400
328.1700
322.6900
325.4000
1,314,400
322.4700
330.9300
321.5800
329.7600
1,397,600
325.6100
326.5500
320.1000
322.4700
1,187,700
321.2100
327.2700
321.2100
326.1700
867,100
Weekend
Weekend
No trading
321.9400
328.7900
319.5700
323.1400
1,124,100
321.8800
325.3900
318.0000
321.3400
1,081,400
326.0500
326.6900
319.9000
322.7800
1,413,800
316.4500
325.3800
315.6600
324.0600
1,216,600
Weekend
Weekend
322.1900
328.0000
312.0500
313.6600
1,344,000
320.8300
326.6000
320.8300
323.7700
1,211,500
325.3600
327.4600
317.4600
321.4500
956,600
327.5600
328.8400
324.9600
327.0300
1,180,400
327.9900
328.2900
323.5100
325.9700
1,300,900
Weekend
Weekend
317.2400
326.5600
317.2400
325.6300
2,408,700
320.0000
320.8000
315.6400
316.9900
1,314,500
319.6700
320.3000
314.8000
317.8800
984,200
326.7500
333.2600
319.2300
321.1800
1,590,900
322.6000
327.2600
320.1300
326.7500
1,067,800
Weekend
Weekend
320.0100
324.2000
318.0200
321.4100
1,124,100
316.0000
323.2600
313.8100
315.9100
1,866,400
320.9600
322.0400
316.5500
316.9000
1,319,200
332.2200
332.2200
320.4400
320.9600
1,412,300
341.5500
342.3800
329.7500
332.8400
1,708,500
Weekend
Weekend
337.3700
341.4600
334.0900
340.6000
1,187,700
338.9700
341.8600
336.4900
338.7700
1,554,700
337.4200
344.6500
337.3700
341.1800
2,026,300
333.3700
339.3600
331.7100
339.0700
1,414,600
332.0200
340.3200
331.9600
337.8000
1,270,700
Weekend
Weekend
331.0000
337.9700
330.5600
335.4700
2,126,200
325.5000
332.0000
325.1600
330.2700
1,062,000
319.9000
325.0400
317.7800
324.6600
1,410,600
316.9600
321.3000
312.5800
319.3300
1,471,200
324.7100
326.4400
314.8900
315.3100
1,425,700
Weekend
Weekend
325.9400
327.2000
323.1800
325.0700
1,265,000
322.7700
324.3100
320.9100
324.3000
1,015,300
322.9300
326.4100
321.0300
322.9800
1,172,300
324.8500
329.5700
320.0000
325.9600
1,862,300
No trading
Weekend
Weekend
12 · 10-K
After-hours · 16:15 ET
10-K ↗
317.9500
322.3900
313.1600
321.7000
2,220,200
309.7100
317.5800
304.5900
314.4900
2,827,500
315.3200
317.9100
307.0100
309.9700
2,960,100
312.9900
322.0800
312.9900
317.9200
3,966,900
340.7600
343.9200
309.1300
310.3400
3,885,900
Weekend
Weekend
344.7100
345.0000
340.5800
342.0400
1,326,100
350.3200
353.6800
343.1900
343.3600
1,421,900
348.2800
355.9600
348.1800
350.2100
1,272,700
347.3100
351.1500
343.2000
346.8400
1,266,300
353.1400
358.0400
348.2500
349.6100
1,371,700
Weekend
Weekend
346.9600
351.8000
341.1700
349.6400
1,938,400
11 · 8-K
Pre-market · 06:35 ET
8-K ↗
335.6200
343.2800
335.5700
342.9500
2,149,200
329.4100
335.2300
327.5300
333.0000
1,341,200
337.1800
337.7800
325.9000
330.7500
1,330,500
339.3200
342.0000
336.9200
338.8700
1,156,700
Weekend
Weekend
336.1400
338.8400
333.8500
338.6900
1,053,400
331.9900
336.5800
330.3000
335.9600
1,370,700
339.5000
341.8300
330.7700
332.7600
1,592,900
341.3800
342.9700
337.4400
339.5000
1,645,500
No trading
Weekend
Weekend
343.2800
344.3900
340.6000
343.8600
882,900
346.0000
347.0600
342.7000
344.8400
915,900
344.7000
347.8300
344.5000
346.0000
1,019,700
348.8800
350.7000
343.2300
344.5900
1,028,400
351.0000
353.9300
349.3700
350.4900
1,053,500
Weekend
Weekend
351.4100
353.3600
350.1200
350.8000
678,400
349.0300
355.4300
347.2200
351.9700
861,700
348.1300
353.1600
342.9200
349.9200
1,390,700
10 · 8-K
Pre-market · 06:30 ET
8-K ↗
350.3500
353.5300
348.3200
349.6700
797,800
340.9100
352.1600
339.3900
351.2900
992,700
Weekend
Weekend
351.1200
351.6500
342.7500
344.2700
780,600
9 · 8-K
Pre-market · 08:00 ET
8-K ↗
No trading
356.9600
356.9600
352.8200
352.8800
453,300
355.9400
357.5700
353.6600
356.4900
440,100
356.6600
358.5500
355.4000
356.7300
433,200
Weekend
Weekend
356.2400
357.7900
354.1400
356.6500
309,400
No trading
355.0000
358.1400
354.0200
356.6500
283,900
355.7700
356.8100
353.8800
355.8700
590,300
348.8700
356.7700
348.0000
355.4600
827,000
Weekend
Weekend
352.6600
354.4600
349.9100
350.0400
2,459,700
350.7000
354.0600
350.7000
353.0200
980,100
350.3600
354.4000
349.9300
352.0300
885,300
352.8400
354.7200
351.0400
351.8000
1,121,400
353.7100
355.3300
350.9800
354.1000
968,800
Weekend
Weekend
348.6400
354.1200
347.3900
353.7900
1,074,300
342.7300
348.1200
340.0500
347.4000
1,037,300
346.2600
346.4200
336.4300
340.0500
1,300,300
344.3200
348.6600
343.0800
346.1900
974,800
343.2300
344.5500
341.0300
343.3900
875,000
Weekend
Weekend
346.7200
347.5700
340.1900
345.2000
1,189,000
344.4500
347.9900
344.4500
347.7100
690,800
345.4900
347.3400
341.9800
344.4500
798,400
351.0400
351.6600
345.5400
345.7000
982,900
352.6900
355.4800
350.4200
351.1700
1,085,600
Weekend
Weekend
352.1200
355.6200
351.4900
353.9200
400,100
No trading
351.4900
353.4500
349.7700
352.6100
654,700
344.0600
351.5000
342.8000
350.9600
692,600
347.2300
347.3200
343.3200
344.7000
1,657,400
Weekend
Weekend
346.0000
349.7000
344.1500
346.5100
1,967,900
343.7500
346.0600
343.1800
345.8900
1,124,000
348.3600
349.9800
339.1700
344.1700
1,112,000
352.2300
352.6400
344.4100
348.5400
1,428,700
350.0000
353.0000
347.2700
350.0200
1,609,300
Weekend
Weekend
351.8500
354.2400
344.8700
350.1300
1,232,200
349.9400
352.9900
347.2800
350.9400
1,183,600
349.1700
351.5900
345.4100
350.1100
1,221,200
346.7400
350.4300
344.6400
349.9300
789,600
343.3400
346.8300
341.0200
344.8700
1,099,100
Weekend
Weekend
340.9400
348.1800
339.0100
346.3200
1,500,600
340.8300
343.6100
339.0000
340.0000
897,100
344.2100
346.7600
341.7000
341.7000
1,344,800
340.1100
344.3700
337.8200
344.2100
1,074,500
339.4200
340.3700
331.1400
339.8400
1,474,800
Weekend
Weekend
8 · 10-Q
After-hours · 16:05 ET
10-Q ↗
336.4300
348.6100
334.8000
340.6800
2,460,200
7 · 8-K
Pre-market · 06:32 ET
8-K ↗
6 · 8-K
After-hours · 16:16 ET
8-K ↗
328.0700
330.7100
326.5100
328.1900
2,212,400
327.9300
329.1900
324.2800
326.0700
1,532,200
335.2100
335.2100
329.0000
329.9600
1,212,800
337.0000
338.6100
335.2400
336.8700
1,438,700
Weekend
Weekend
340.5000
342.3300
337.3400
337.7300
842,000
343.0000
343.4000
338.2500
341.3500
1,238,200
343.3200
344.2900
340.5100
343.1000
1,189,500
343.8000
346.3700
342.1800
343.4300
981,500
347.2200
347.2200
341.4000
344.1100
935,100
Weekend
Weekend
344.0700
348.3100
344.0600
346.6000
2,057,500
348.9200
349.0400
337.9200
343.1200
1,820,400
357.4900
359.9700
353.9300
355.8000
1,094,300
353.7800
360.8200
352.4000
360.5100
845,600
357.1100
359.5600
351.8700
353.3600
728,700
Weekend
Weekend
362.2600
363.2900
359.1800
360.1500
628,100
365.6000
367.2500
359.9200
360.4200
692,500
366.4900
370.3100
364.9400
365.3800
1,114,400
366.2500
369.6800
364.3300
366.9300
852,900
364.0700
367.0000
362.1200
365.7000
1,109,200
Weekend
Weekend
359.9500
365.9800
359.4900
363.8100
666,900
357.4700
362.2300
354.6100
360.7300
621,300
355.1500
360.1400
353.3100
360.1300
1,444,900
354.5200
357.0100
351.8000
356.5800
1,022,800
355.0100
356.6200
352.5600
354.6200
1,059,600
Weekend
Weekend
354.1700
358.9900
351.4900
356.0800
824,600
355.4600
356.7400
349.1500
351.6400
1,291,100
352.8400
356.2800
352.5000
353.7400
981,300
353.4000
356.5800
349.3300
353.0700
1,761,200
350.5600
355.2100
349.2100
353.4600
1,275,900
Weekend
Weekend
354.1900
355.4000
348.6400
351.3200
3,728,800
355.6400
357.8300
352.6900
352.7600
1,392,900
357.9700
361.2400
355.2200
358.0000
1,426,900
361.2600
362.7600
356.1500
356.5700
1,351,500
371.9000
373.6000
363.2000
363.8000
933,800
Weekend
Weekend
371.5600
374.0500
369.8100
371.9500
844,400
366.0900
372.3900
364.7900
372.2500
1,614,300
364.7800
365.3600
361.0800
362.3700
798,900
369.9300
370.4800
365.8600
366.3800
1,019,900
370.5400
370.5400
365.4700
370.0100
1,043,500
Weekend
Weekend
372.9100
375.6400
368.0400
370.5400
789,000
375.4800
375.8700
370.8500
373.4900
751,300
372.6800
375.0000
368.2700
374.0000
1,219,900
5 · 8-K
Pre-market · 07:01 ET
8-K ↗
367.6300
372.7500
365.9600
371.9600
1,285,600
No trading
Weekend
Weekend
367.8500
368.5600
365.7900
367.0000
774,600
367.7700
368.0400
364.0300
366.5400
711,200
369.9000
371.0900
368.0200
368.3700
931,600
369.1400
371.1100
367.0200
369.0000
1,449,900
374.1100
376.6900
370.7300
370.9400
1,025,900
Weekend
Weekend
377.4500
378.7000
373.8500
375.1000
1,190,600
372.5000
375.7700
371.1700
375.2700
1,126,200
373.9300
378.6800
372.7200
374.0000
1,105,000
367.0900
373.3600
366.2400
372.8600
1,111,100
366.0800
369.7800
365.2100
365.3700
1,323,900
Weekend
Weekend
367.2000
370.7000
365.2100
367.0100
1,181,100
371.0400
372.0400
365.1400
366.3500
1,292,900
366.8100
372.4600
365.5900
370.9200
1,316,700
368.4800
368.6600
360.2500
363.8100
2,991,600
366.9500
370.3400
365.4600
368.0900
1,274,700
Weekend
Weekend
367.0000
367.0100
363.5800
366.4000
1,095,200
363.7100
366.6600
361.2500
365.0300
1,843,700
363.2000
364.3400
358.3200
363.6800
931,800
360.7900
364.1300
359.7800
361.6000
1,201,500
4 · 8-K
After-hours · 16:31 ET
8-K ↗
353.7800
360.8800
351.5800
360.4000
1,133,700
Weekend
Weekend
356.6800
356.6800
351.4400
353.4600
1,640,900
352.9100
360.1700
352.9100
355.7100
1,387,300
356.0000
359.5300
353.7300
355.3400
1,526,100
3 · 8-K
After-hours · 16:34 ET
8-K ↗
369.1600
369.1600
352.0300
354.0300
2,218,400
371.3000
373.5500
367.5700
369.1600
1,503,400
Weekend
Weekend
2 · 10-Q
After-hours · 16:14 ET
10-Q ↗
368.5100
381.0000
368.5100
372.8900
2,251,400
1 · 8-K
Pre-market · 06:01 ET
8-K ↗
357.1700
359.7500
356.0100
356.6100
1,515,500
355.6100
357.4300
351.1600
357.2800
1,679,500
351.9800
355.8200
351.6000
354.2200
1,960,900
Announcement Events
Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.