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HowShorted

ICLR short interest Nasdaq Global Market

ICON plc Ordinary Shares. 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
2,626,654
vs previous settlement
+247,561 (+10.4%)
days to cover
2.77
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for ICLR 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 ICLR days to cover

Fails to deliver

The SEC's fails-to-deliver figure for ICLR: 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
709
11 Sep 2026
Highest in window
310,621
17 Feb 2026
Days with a balance
70
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for ICON plc Ordinary Shares 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 311K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20262,626,654+247,5612.77
31 Aug 20262,379,093+158,6195.01
14 Aug 20262,220,474โˆ’2,8373.48
31 Jul 20262,223,311โˆ’373,5402.31
15 Jul 20262,596,851โˆ’394,7274.25
30 Jun 20262,991,578โˆ’248,5772.42
15 Jun 20263,240,155+233,3452.92
29 May 20263,006,810โˆ’285,4062.52
15 May 20263,292,216+613,6753.51
30 Apr 20262,678,541โˆ’416,0141.48
15 Apr 20263,094,555+198,0423.92
31 Mar 20262,896,513+867,4603.09
13 Mar 20262,029,053+99,8951.71
27 Feb 20261,929,158โˆ’71,0351.00
13 Feb 20262,000,193โˆ’823,3981.00
30 Jan 20262,823,591+81,4303.86
15 Jan 20262,742,161+102,5652.39
31 Dec 20252,639,596โˆ’146,2114.28
15 Dec 20252,785,807โˆ’2,4992.71
28 Nov 20252,788,306+889,5892.47
14 Nov 20251,898,717+9,5803.00
31 Oct 20251,889,137โˆ’362,6781.57
15 Oct 20252,251,815โˆ’228,4972.69
30 Sep 20252,480,312โˆ’371,8582.68
15 Sep 20252,852,170+506,4382.20
29 Aug 20252,345,732+171,6292.95
15 Aug 20252,174,103+80,7522.07
31 Jul 20252,093,351โˆ’130,9441.00
15 Jul 20252,224,295+142,6662.16
30 Jun 20252,081,629+347,0301.66
13 Jun 20251,734,599+288,2521.49
30 May 20251,446,347โˆ’78,7241.21
15 May 20251,525,071+305,6261.00
30 Apr 20251,219,445โˆ’691,2351.00
15 Apr 20251,910,680โˆ’374,3001.49
31 Mar 20252,284,980+674,1262.50
14 Mar 20251,610,854โˆ’76,7321.52
28 Feb 20251,687,586+205,2331.43
14 Feb 20251,482,353+91,9441.85
31 Jan 20251,390,409โˆ’223,1131.51
15 Jan 20251,613,522+40,0351.63
31 Dec 20241,573,487+57,9651.96
13 Dec 20241,515,522+188,2941.32
29 Nov 20241,327,228+43,9091.00
15 Nov 20241,283,319+203,1831.00
31 Oct 20241,080,136โˆ’669,3841.00
15 Oct 20241,749,520โˆ’7,1353.44
30 Sep 20241,756,655+267,3902.55
13 Sep 20241,489,265โˆ’62,2801.77
30 Aug 20241,551,545โˆ’42,5095.36
15 Aug 20241,594,054โˆ’57,7004.24
31 Jul 20241,651,754+177,5562.39
15 Jul 20241,474,198โˆ’532,6053.31
28 Jun 20242,006,803โˆ’96,6311.91
14 Jun 20242,103,434+141,7224.53
31 May 20241,961,712+72,3764.01
15 May 20241,889,336โˆ’30,7153.88
30 Apr 20241,920,051+339,8992.79
15 Apr 20241,580,152+190,6684.03
28 Mar 20241,389,484โˆ’103,2803.32
15 Mar 20241,492,764โˆ’41,4512.82
29 Feb 20241,534,215โˆ’275,8212.23
15 Feb 20241,810,036โˆ’210,9243.24
31 Jan 20242,020,960+353,4503.64
12 Jan 20241,667,510โˆ’61,1642.71
29 Dec 20231,728,674+177,8164.65
15 Dec 20231,550,858โˆ’134,0632.95
30 Nov 20231,684,921โˆ’33,6243.90
15 Nov 20231,718,545สณโˆ’154,3344.02
31 Oct 20231,872,879+35,8502.56
13 Oct 20231,837,029โˆ’626,3953.25
29 Sep 20232,463,424+333,5685.35
15 Sep 20232,129,856โˆ’113,0764.45
31 Aug 20232,242,932โˆ’392,2214.84
15 Aug 20232,635,153+387,2985.15
31 Jul 20232,247,855โˆ’240,9382.82
14 Jul 20232,488,793+132,4573.60
30 Jun 20232,356,336+575,6561.90
15 Jun 20231,780,680+431,3033.65
31 May 20231,349,377+156,5911.97
15 May 20231,192,786+193,0421.57
28 Apr 2023999,744+46,9591.21
14 Apr 2023952,785+210,5112.48
31 Mar 2023742,274โˆ’68,2521.49
15 Mar 2023810,526+79,4071.59
28 Feb 2023731,119โˆ’343,9931.10
15 Feb 20231,075,112+308,5302.44
31 Jan 2023766,582โˆ’155,0381.84
13 Jan 2023921,620+115,3711.56
30 Dec 2022806,249+112,3521.98
15 Dec 2022693,897โˆ’76,7951.12
30 Nov 2022770,692โˆ’17,6331.66
15 Nov 2022788,325โˆ’71,2841.14
31 Oct 2022859,609โˆ’407,8411.05
14 Oct 20221,267,450โˆ’57,2272.33
30 Sep 20221,324,677โˆ’295,0972.35
15 Sep 20221,619,774+461,9132.97
31 Aug 20221,157,861โˆ’136,7663.54
15 Aug 20221,294,627+138,6542.52
29 Jul 20221,155,973โˆ’231,6342.25
15 Jul 20221,387,607โˆ’94,9573.72
30 Jun 20221,482,564+477,3803.06
15 Jun 20221,005,184+262,2181.84
31 May 2022742,966โˆ’95,5281.44
13 May 2022838,494+76,7771.94
29 Apr 2022761,717โˆ’238,4701.46
14 Apr 20221,000,187โˆ’85,1902.10
31 Mar 20221,085,377+176,4931.81
15 Mar 2022908,884โˆ’58,6621.40
28 Feb 2022967,546โˆ’25,7151.00
15 Feb 2022993,261โˆ’145,5991.95
31 Jan 20221,138,860โˆ’101,2241.61
14 Jan 20221,240,084+133,4681.99
31 Dec 20211,106,616+116,8132.22
15 Dec 2021989,803+131,3412.44
30 Nov 2021858,462+109,0852.39
15 Nov 2021749,377+47,6841.61
29 Oct 2021701,693โˆ’4,9831.85
15 Oct 2021706,676โˆ’135,1231.98
30 Sep 2021841,799+87,1421.54
15 Sep 2021754,657โˆ’187,7832.01
31 Aug 2021942,440โˆ’163,9422.11
13 Aug 20211,106,382+115,9641.43
30 Jul 2021990,418โˆ’133,7801.00
15 Jul 20211,124,198โˆ’7,592,8351.00
30 Jun 20218,717,033+1,655,9817.29
15 Jun 20217,061,052สณ+635,54415.18
28 May 20216,425,508+173,63514.62
14 May 20216,251,873+575,50810.24
30 Apr 20215,676,365+657,3619.61
15 Apr 20215,019,004+1,203,70010.98
31 Mar 20213,815,304+820,7746.04
15 Mar 20212,994,530+1,577,1363.27
26 Feb 20211,417,394+774,2621.98
12 Feb 2021643,132โˆ’27,7352.93
29 Jan 2021670,867โˆ’247,3593.80
15 Jan 2021918,226+230,6844.27
31 Dec 2020687,542โˆ’8,7124.22
15 Dec 2020696,254+7,2193.38
30 Nov 2020689,035+63,0504.81
13 Nov 2020625,985+6,1423.26
30 Oct 2020619,843สณโˆ’146,5933.28
15 Oct 2020766,436+110,4043.21
30 Sep 2020656,032+105,1662.95
15 Sep 2020550,866+12,9344.37
31 Aug 2020537,932+14,0303.71
14 Aug 2020523,902+16,2773.38
31 Jul 2020507,625โˆ’78,6602.22
15 Jul 2020586,285โˆ’5,7813.19
30 Jun 2020592,066+7,5782.71
15 Jun 2020584,488โˆ’63,9362.74
29 May 2020648,424โˆ’190,6212.66
15 May 2020839,045สณโˆ’35,1633.65
30 Apr 2020874,208โˆ’159,2512.84
15 Apr 20201,033,459โˆ’40,1163.51
31 Mar 20201,073,575+58,5602.02
13 Mar 20201,015,015+177,5723.16
28 Feb 2020837,443โˆ’65,1772.60
14 Feb 2020902,620โˆ’140,4186.58
31 Jan 20201,043,038โˆ’147,5796.38
15 Jan 20201,190,617+5,7025.12
31 Dec 20191,184,915+171,7165.11
13 Dec 20191,013,199+199,1104.00
29 Nov 2019814,089+50,5643.17
15 Nov 2019763,525โˆ’98,9163.38
31 Oct 2019862,441+220,9803.25
15 Oct 2019641,461+112,9542.29
30 Sep 2019528,507+78,2512.88
13 Sep 2019450,256โˆ’43,2221.92
30 Aug 2019493,478โˆ’24,2952.99
15 Aug 2019517,773+19,0772.14
31 Jul 2019498,696+53,8761.95
15 Jul 2019444,820โˆ’161,8512.37
28 Jun 2019606,671โˆ’60,8792.09
14 Jun 2019667,550+33,7732.75
31 May 2019633,777+45,3192.67
15 May 2019588,458โˆ’118,1231.76
30 Apr 2019706,581+115,9902.27
15 Apr 2019590,591โˆ’45,6783.01
29 Mar 2019636,269+22,8572.57
15 Mar 2019613,412+65,3411.16
28 Feb 2019548,071+53,5091.81
15 Feb 2019494,562โˆ’9,3042.08
31 Jan 2019503,866โˆ’149,7371.93
15 Jan 2019653,603+26,0761.99
31 Dec 2018627,527โˆ’279,4812.47
14 Dec 2018907,008+32,0272.17
30 Nov 2018874,981+62,7782.83
15 Nov 2018812,203+62,6424.45
31 Oct 2018749,561+58,8292.49
15 Oct 2018690,732โˆ’49,4942.70
28 Sep 2018740,226โˆ’74,5163.77
14 Sep 2018814,742โˆ’148,0713.84
31 Aug 2018962,813โˆ’132,0435.87
15 Aug 20181,094,856โˆ’48,5874.46
31 Jul 20181,143,443+82,7713.78
13 Jul 20181,060,672โˆ’35,2745.30
29 Jun 20181,095,946+42,8145.35
15 Jun 20181,053,132+118,8125.63
31 May 2018934,320โˆ’88,0784.78
15 May 20181,022,398โˆ’45,5124.59
30 Apr 20181,067,910+121,6535.08
13 Apr 2018946,257โˆ’60,0232.86
29 Mar 20181,006,280โˆ’43,8003.76
15 Mar 20181,050,080+56,3003.54
28 Feb 2018993,780โˆ’40,8223.36
15 Feb 20181,034,602โˆ’20,0022.36
31 Jan 20181,054,604+193,4963.20
12 Jan 2018861,108+60,2823.01
29 Dec 2017800,826โ€“3.48

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

Questions

Frequently asked questions

What is ICLR's short interest?
2,626,654 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 247,561 from the previous settlement.
Why is there no percentage for ICLR?
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 ICLR's days to cover?
2.77 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.

Ranked companies with a percentage: most shorted US stocks. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.