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HowShorted

AON short interest NYSE

Aon plc Class A. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: an SEC filer exists but no defensible share count is available yet.

Shares short
3,695,919
vs previous settlement
โˆ’84,532 (-2.2%)
days to cover
1.75
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for AON shares short

Days to cover

FINRA's own figure: reported shares short divided by the security's average daily trading volume, published alongside each settlement.

Aggregate net short position time series for AON days to cover

Fails to deliver

The SEC's fails-to-deliver figure for AON: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Last balance on file
880
8 Sep 2026
Highest in window
40,581
15 Jun 2026
Days with a balance
42
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Aon plc Class A fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 41K shares.

History

Every FINRA settlement we hold for AON, newest first. สณ marks a figure FINRA itself flagged as revised.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20263,695,919โˆ’84,5321.75
31 Aug 20263,780,451+411,8224.44
14 Aug 20263,368,629โˆ’1,551,1403.60
31 Jul 20264,919,769+365,1213.05
15 Jul 20264,554,648+858,7924.04
30 Jun 20263,695,856+105,2261.61
15 Jun 20263,590,630+597,5602.41
29 May 20262,993,070+136,0471.97
15 May 20262,857,023+484,8181.83
30 Apr 20262,372,205โˆ’50,3021.89
15 Apr 20262,422,507โˆ’63,4331.80
31 Mar 20262,485,940+300,1851.87
13 Mar 20262,185,755โˆ’84,5501.47
27 Feb 20262,270,305+68,2921.59
13 Feb 20262,202,013+171,6321.00
30 Jan 20262,030,381+80,8991.40
15 Jan 20261,949,482+25,5482.05
31 Dec 20251,923,934+31,9782.41
15 Dec 20251,891,956โˆ’144,0491.90
28 Nov 20252,036,005+98,8141.72
14 Nov 20251,937,191+54,2241.64
31 Oct 20251,882,967โˆ’142,3771.26
15 Oct 20252,025,344โˆ’53,0722.27
30 Sep 20252,078,416โˆ’57,9601.42
15 Sep 20252,136,376+296,8262.07
29 Aug 20251,839,550โˆ’377,2511.71
15 Aug 20252,216,801โˆ’787,5711.53
31 Jul 20253,004,372โˆ’1,607,9371.94
15 Jul 20254,612,309โˆ’564,7374.12
30 Jun 20255,177,046+224,9713.28
13 Jun 20254,952,075โˆ’31,5184.07
30 May 20254,983,593โˆ’8,8224.63
15 May 20254,992,415+124,2693.99
30 Apr 20254,868,146+498,5172.28
15 Apr 20254,369,629โˆ’459,8202.71
31 Mar 20254,829,449โˆ’627,5493.95
14 Mar 20255,456,998โˆ’64,7633.80
28 Feb 20255,521,761+452,7814.38
14 Feb 20255,068,980+618,3945.76
31 Jan 20254,450,586โˆ’152,4783.67
15 Jan 20254,603,064+35,4234.65
31 Dec 20244,567,641+279,6985.97
13 Dec 20244,287,943โˆ’502,2813.38
29 Nov 20244,790,224+66,9325.40
15 Nov 20244,723,292+32,9764.02
31 Oct 20244,690,316โˆ’10,6114.34
15 Oct 20244,700,927+139,1125.35
30 Sep 20244,561,815+320,0695.68
13 Sep 20244,241,746โˆ’156,2995.39
30 Aug 20244,398,045+221,5236.09
15 Aug 20244,176,522+154,0403.85
31 Jul 20244,022,482+673,9032.77
15 Jul 20243,348,579โˆ’298,5643.24
28 Jun 20243,647,143+465,1281.68
14 Jun 20243,182,015+153,7801.96
31 May 20243,028,235โˆ’372,4822.01
15 May 20243,400,717+1,023,4391.99
30 Apr 20242,377,278+415,0451.33
15 Apr 20241,962,233+107,6282.08
28 Mar 20241,854,605+87,9182.17
15 Mar 20241,766,687โˆ’22,0862.45
29 Feb 20241,788,773โˆ’35,5642.29
15 Feb 20241,824,337+1,7081.45
31 Jan 20241,822,629+145,6541.40
12 Jan 20241,676,975โˆ’128,1871.58
29 Dec 20231,805,162โˆ’53,2001.30
15 Dec 20231,858,362+112,4051.49
30 Nov 20231,745,957โˆ’144,7491.94
15 Nov 20231,890,706+162,1062.31
31 Oct 20231,728,600+21,9351.91
13 Oct 20231,706,665+112,9372.60
29 Sep 20231,593,728โˆ’41,4302.88
15 Sep 20231,635,158+33,2062.24
31 Aug 20231,601,952โˆ’205,3842.46
15 Aug 20231,807,336+2872.17
31 Jul 20231,807,049โˆ’28,0001.80
14 Jul 20231,835,049โˆ’78,7143.29
30 Jun 20231,913,763โˆ’165,8631.75
15 Jun 20232,079,626โˆ’6,1873.04
31 May 20232,085,813+345,9262.53
15 May 20231,739,887โˆ’444,1302.31
28 Apr 20232,184,017+174,2652.06
14 Apr 20232,009,752+7,2692.96
31 Mar 20232,002,483+249,2091.89
15 Mar 20231,753,274+153,7461.97
28 Feb 20231,599,528+22,7812.31
15 Feb 20231,576,747โˆ’95,2961.79
31 Jan 20231,672,043+451,5222.05
13 Jan 20231,220,521โˆ’33,4951.97
30 Dec 20221,254,016โˆ’180,7441.86
15 Dec 20221,434,760โˆ’344,0701.55
30 Nov 20221,778,830+139,9162.42
15 Nov 20221,638,914โˆ’10,9872.37
31 Oct 20221,649,901โˆ’164,4781.62
14 Oct 20221,814,379โˆ’166,9472.51
30 Sep 20221,981,326โˆ’121,6462.20
15 Sep 20222,102,972+28,8332.88
31 Aug 20222,074,139+94,0663.01
15 Aug 20221,980,073+111,8802.49
29 Jul 20221,868,193+86,6172.15
15 Jul 20221,781,576โˆ’186,6271.96
30 Jun 20221,968,203โˆ’8,9571.89
15 Jun 20221,977,160โˆ’429,7112.40
31 May 20222,406,871โˆ’234,1532.02
13 May 20222,641,024+70,5432.60
29 Apr 20222,570,481โˆ’316,4072.38
14 Apr 20222,886,888โˆ’291,4683.60
31 Mar 20223,178,356โˆ’639,6912.27
15 Mar 20223,818,047+391,0342.39
28 Feb 20223,427,013โˆ’71,0342.76
15 Feb 20223,498,047+447,0612.81
31 Jan 20223,050,986โˆ’472,9062.28
14 Jan 20223,523,892โˆ’318,5062.81
31 Dec 20213,842,398โˆ’1,153,6793.43
15 Dec 20214,996,077โˆ’502,5934.15
30 Nov 20215,498,670โˆ’113,2193.42
15 Nov 20215,611,889โˆ’569,6463.93
29 Oct 20216,181,535โˆ’836,9105.10
15 Oct 20217,018,445โˆ’971,2586.48
30 Sep 20217,989,703โˆ’1,789,5836.57
15 Sep 20219,779,286โˆ’1,391,6097.53
31 Aug 202111,170,895โˆ’2,992,1357.34
13 Aug 202114,163,030โˆ’5,469,9736.95
30 Jul 202119,633,003โˆ’6,205,2224.83
15 Jul 202125,838,225+6,91620.66
30 Jun 202125,831,309โˆ’2,107,0119.23
15 Jun 202127,938,320สณโˆ’30,64019.15
28 May 202127,968,960+1,034,27320.74
14 May 202126,934,687+1,060,44019.22
30 Apr 202125,874,247+1,987,32217.02
15 Apr 202123,886,925+990,44819.85
31 Mar 202122,896,477โˆ’1,796,07212.14
15 Mar 202124,692,549โˆ’87,34118.10
26 Feb 202124,779,890+273,35314.15
12 Feb 202124,506,537+934,07815.26
29 Jan 202123,572,459+1,003,93717.83
15 Jan 202122,568,522+1,096,12215.79
31 Dec 202021,472,400+295,98914.96
15 Dec 202021,176,411+852,26115.26
30 Nov 202020,324,150+1,438,61915.78
13 Nov 202018,885,531+141,3499.71
30 Oct 202018,744,182+185,62316.72
15 Oct 202018,558,559+721,74417.86
30 Sep 202017,836,815โˆ’350,76512.40
15 Sep 202018,187,580+1,339,79913.94
31 Aug 202016,847,781+908,78612.78
14 Aug 202015,938,995+923,6779.84
31 Jul 202015,015,318+1,458,07712.87
15 Jul 202013,557,241+182,46311.63
30 Jun 202013,374,778+1,075,6368.33
15 Jun 202012,299,142+1,136,50210.04
29 May 202011,162,640+78,79610.47
15 May 202011,083,844สณ+584,2098.10
30 Apr 202010,499,635+1,542,6258.66
15 Apr 20208,957,010+1,007,2096.21
31 Mar 20207,949,801+3,948,7743.16
13 Mar 20204,001,027+2,524,5261.46
28 Feb 20201,476,501โˆ’60,3731.14
14 Feb 20201,536,874+97,1121.83
31 Jan 20201,439,762+6,3881.92
15 Jan 20201,433,374+12,1652.66
31 Dec 20191,421,209โˆ’262,5961.62
13 Dec 20191,683,805+128,5752.88
29 Nov 20191,555,230+12,6551.78
15 Nov 20191,542,575+71,9791.71
31 Oct 20191,470,596โˆ’324,7481.53
15 Oct 20191,795,344+46,8593.19
30 Sep 20191,748,485+105,2402.25
13 Sep 20191,643,245โˆ’212,8481.99
30 Aug 20191,856,093+239,5472.93
15 Aug 20191,616,546+62,4291.82
31 Jul 20191,554,117โˆ’159,6452.00
15 Jul 20191,713,762โˆ’335,1682.89
28 Jun 20192,048,930+283,6392.44
14 Jun 20191,765,291+67,0181.97
31 May 20191,698,273โˆ’38,4021.57
15 May 20191,736,675+113,2912.28
30 Apr 20191,623,384+12,9191.87
15 Apr 20191,610,465โˆ’224,8852.24
29 Mar 20191,835,350+289,9702.22
15 Mar 20191,545,380โˆ’1,9031.00
28 Feb 20191,547,283โˆ’488,0881.58
15 Feb 20192,035,371+396,7341.52
31 Jan 20191,638,637โˆ’7,2221.55
15 Jan 20191,645,859โˆ’204,0921.49
31 Dec 20181,849,951โˆ’543,3051.51
14 Dec 20182,393,256+218,0202.56
30 Nov 20182,175,236โˆ’27,3022.12
15 Nov 20182,202,538โˆ’182,5392.35
31 Oct 20182,385,077โˆ’78,2531.97
15 Oct 20182,463,330+183,9342.73
28 Sep 20182,279,396โˆ’6,2172.13
14 Sep 20182,285,613+141,2242.89
31 Aug 20182,144,389+195,7552.88
15 Aug 20181,948,634โˆ’62,8292.84
31 Jul 20182,011,463+144,9032.36
13 Jul 20181,866,560สณ+37,1042.59
29 Jun 20181,829,456โˆ’282,9141.89
15 Jun 20182,112,370โˆ’251,4432.39
31 May 20182,363,813โˆ’130,3782.69
15 May 20182,494,191โˆ’247,9712.85
30 Apr 20182,742,162+117,7893.16
13 Apr 20182,624,373โˆ’19,0243.28
29 Mar 20182,643,397โˆ’740,1902.20
15 Mar 20183,383,587โˆ’358,3863.09
28 Feb 20183,741,973โˆ’606,4362.99
15 Feb 20184,348,409+28,1222.23
31 Jan 20184,320,287+319,2883.46
12 Jan 20184,000,999+194,1603.71
29 Dec 20173,806,839โ€“3.96

Scroll inside the table for earlier settlements, back to 29 Dec 2017.

Questions

Frequently asked questions

What is AON's short interest?
3,695,919 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 84,532 from the previous settlement.
Why is there no percentage for AON?
Because no defensible share count exists to divide by: an SEC filer exists but no defensible share count is available yet. The symbol maps to an SEC filer, but its share count cannot be used yet. A newly listed company needs two cover-page counts on file before the first is trusted; a split or an unexplained jump pauses publication until a fresh SEC count corroborates it; a secondary share class publishes under the company's primary line; and a foreign filer's short count is in depositary-share units. This page upgrades to a percentage automatically once a defensible count exists.
What is AON's days to cover?
1.75 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume, published in the same file and shown verbatim. We hold no volume data ourselves.
Is this the short float?
No. This page shows FINRA's share count only. Short float divides that count by the public float, and short interest as we publish it elsewhere divides it by shares outstanding from SEC filings. Neither denominator is available for this line, so neither ratio is shown.
How often does this update?
FINRA member firms report short positions as of the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. We ingest each file the day it appears and re-read recent settlements for revisions.

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