Skip to content
HowShorted

IWB short interest NYSE Arca

iShares Russell 1000 ETF. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: exchange-traded product: its share count floats with creation and redemption.

Shares short
1,416,381
vs previous settlement
+154,752 (+12.3%)
days to cover
3.52
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for IWB: 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.

Latest balance
133
14 Sep 2026
Highest in window
657,369
15 Dec 2025
Days with a balance
90
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for iShares Russell 1000 ETF 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 657K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20261,416,381+154,7523.52
31 Aug 20261,261,629โˆ’74,4002.61
14 Aug 20261,336,029+126,6212.20
31 Jul 20261,209,408โˆ’68,5082.61
15 Jul 20261,277,916โˆ’190,0922.84
30 Jun 20261,468,008โˆ’30,8261.91
15 Jun 20261,498,834+147,3372.35
29 May 20261,351,497+150,8821.93
15 May 20261,200,615+8652.01
30 Apr 20261,199,750โˆ’188,9041.19
15 Apr 20261,388,654โˆ’40,4781.12
31 Mar 20261,429,132โˆ’474,0981.00
13 Mar 20261,903,230+592,7681.05
27 Feb 20261,310,462โˆ’222,9961.00
13 Feb 20261,533,458+270,1121.21
30 Jan 20261,263,346โˆ’519,8121.00
15 Jan 20261,783,158โˆ’352,0331.12
31 Dec 20252,135,191+57,2982.23
15 Dec 20252,077,893โˆ’159,8641.49
28 Nov 20252,237,757โˆ’344,7412.24
14 Nov 20252,582,498โˆ’23,5822.39
31 Oct 20252,606,080โˆ’564,5403.50
15 Oct 20253,170,620โˆ’196,7394.15
30 Sep 20253,367,359+1,049,3633.26
15 Sep 20252,317,996+15,3842.31
29 Aug 20252,302,612โˆ’265,3642.41
15 Aug 20252,567,976+459,7153.32
31 Jul 20252,108,261+22,5822.47
15 Jul 20252,085,679โˆ’222,2602.74
30 Jun 20252,307,939โˆ’650,0082.03
13 Jun 20252,957,947+302,2253.68
30 May 20252,655,722โˆ’391,6383.71
15 May 20253,047,360โˆ’193,8083.42
30 Apr 20253,241,168โˆ’173,5573.76
15 Apr 20253,414,725+192,5891.74
31 Mar 20253,222,136โˆ’112,6932.97
14 Mar 20253,334,829+180,4293.26
28 Feb 20253,154,400โˆ’108,9134.10
14 Feb 20253,263,313+15,9774.33
31 Jan 20253,247,336โˆ’20,2764.24
15 Jan 20253,267,612โˆ’36,7123.42
31 Dec 20243,304,324+241,2931.85
13 Dec 20243,063,031โˆ’314,6452.73
29 Nov 20243,377,676โˆ’288,7304.19
15 Nov 20243,666,406+703,0694.29
31 Oct 20242,963,337โˆ’379,5485.03
15 Oct 20243,342,885+87,9117.21
30 Sep 20243,254,974+563,2152.44
13 Sep 20242,691,759โˆ’82,2243.16
30 Aug 20242,773,983โˆ’615,8813.86
15 Aug 20243,389,864+35,3364.01
31 Jul 20243,354,528+139,2294.52
15 Jul 20243,215,299+431,7805.07
28 Jun 20242,783,519+301,2632.12
14 Jun 20242,482,256+383,2563.82
31 May 20242,099,000โˆ’379,0361.53
15 May 20242,478,036โˆ’122,8493.54
30 Apr 20242,600,885โˆ’542,4193.81
15 Apr 20243,143,304โˆ’71,8555.52
28 Mar 20243,215,159โˆ’497,8634.47
15 Mar 20243,713,022+343,1964.05
29 Feb 20243,369,826+537,4973.70
15 Feb 20242,832,329+243,3864.02
31 Jan 20242,588,943โˆ’884,1414.81
12 Jan 20243,473,084โˆ’159,9354.24
29 Dec 20233,633,019โˆ’665,6973.87
15 Dec 20234,298,716+1,112,1892.89
30 Nov 20233,186,527โˆ’341,8813.31
15 Nov 20233,528,408+173,2973.99
31 Oct 20233,355,111โˆ’36,7322.97
13 Oct 20233,391,843โˆ’7,1023.98
29 Sep 20233,398,945โˆ’482,9163.19
15 Sep 20233,881,861+482,5724.09
31 Aug 20233,399,289โˆ’347,1655.15
15 Aug 20233,746,454+192,5826.08
31 Jul 20233,553,872โˆ’249,1914.24
14 Jul 20233,803,063โˆ’241,4626.13
30 Jun 20234,044,525+56,2054.76
15 Jun 20233,988,320โˆ’816,9236.00
31 May 20234,805,243+325,9526.45
15 May 20234,479,291+149,28710.51
28 Apr 20234,330,004+5,0798.81
14 Apr 20234,324,925โˆ’341,3309.41
31 Mar 20234,666,255โˆ’205,1275.38
15 Mar 20234,871,382+204,0625.88
28 Feb 20234,667,320+522,0206.96
15 Feb 20234,145,300+839,9915.64
31 Jan 20233,305,309โˆ’696,5103.42
13 Jan 20234,001,819โˆ’644,5754.73
30 Dec 20224,646,394+419,7803.49
15 Dec 20224,226,614โˆ’197,4603.53
30 Nov 20224,424,074โˆ’178,4205.29
15 Nov 20224,602,494+1,056,7303.57
31 Oct 20223,545,764โˆ’500,7562.58
14 Oct 20224,046,520+369,8832.35
30 Sep 20223,676,637โˆ’34,8911.92
15 Sep 20223,711,528โˆ’74,7373.96
31 Aug 20223,786,265โˆ’493,7067.11
15 Aug 20224,279,971+370,5276.11
29 Jul 20223,909,444โˆ’189,7584.12
15 Jul 20224,099,202+336,4233.51
30 Jun 20223,762,779โˆ’34,7382.69
15 Jun 20223,797,517+117,6662.87
31 May 20223,679,851โˆ’80,8433.06
13 May 20223,760,694โˆ’464,9542.06
29 Apr 20224,225,648+356,0293.82
14 Apr 20223,869,619+414,4174.43
31 Mar 20223,455,202โˆ’630,7894.28
15 Mar 20224,085,991+279,5363.48
28 Feb 20223,806,455+881,3003.54
15 Feb 20222,925,155+303,5883.32
31 Jan 20222,621,567+271,4232.14
14 Jan 20222,350,144โˆ’665,1452.30
31 Dec 20213,015,289โˆ’103,4713.19
15 Dec 20213,118,760+659,3432.90
30 Nov 20212,459,417+250,8893.32
15 Nov 20212,208,528โˆ’11,4685.14
29 Oct 20212,219,996+40,9854.20
15 Oct 20212,179,011+196,4503.49
30 Sep 20211,982,561โˆ’486,9892.37
15 Sep 20212,469,550+178,4223.86
31 Aug 20212,291,128โˆ’8,5053.80
13 Aug 20212,299,633+181,3575.26
30 Jul 20212,118,276+139,6772.70
15 Jul 20211,978,599โˆ’169,7793.52
30 Jun 20212,148,378โˆ’178,8163.53
15 Jun 20212,327,194+254,0664.11
28 May 20212,073,128โˆ’8,4223.73
14 May 20212,081,550โˆ’2,3644.70
30 Apr 20212,083,914+197,4424.14
15 Apr 20211,886,472โˆ’282,1792.71
31 Mar 20212,168,651โˆ’213,5542.80
15 Mar 20212,382,205+764,1264.70
26 Feb 20211,618,079+348,1971.92
12 Feb 20211,269,882โˆ’8,4402.84
29 Jan 20211,278,322+314,9472.73
15 Jan 2021963,375โˆ’1,193,8181.46
31 Dec 20202,157,193โˆ’259,9094.02
15 Dec 20202,417,102+442,0543.78
30 Nov 20201,975,048โˆ’225,9063.47
13 Nov 20202,200,954+361,5084.34
30 Oct 20201,839,446+56,4203.19
15 Oct 20201,783,026+244,9064.61
30 Sep 20201,538,120โˆ’134,6562.56
15 Sep 20201,672,776+49,7032.11
31 Aug 20201,623,073โˆ’238,2103.64
14 Aug 20201,861,283+45,1163.74
31 Jul 20201,816,167โˆ’394,4334.31
15 Jul 20202,210,600+475,4152.96
30 Jun 20201,735,185โˆ’407,4232.24
15 Jun 20202,142,608+124,9672.36
29 May 20202,017,641+610,4192.85
15 May 20201,407,222สณ+145,5811.76
30 Apr 20201,261,641โˆ’277,3991.49
15 Apr 20201,539,040+188,6771.11
31 Mar 20201,350,363โˆ’1,228,3771.00
13 Mar 20202,578,740โˆ’644,6881.20
28 Feb 20203,223,428+55,3951.61
14 Feb 20203,168,033+363,1325.08
31 Jan 20202,804,901โˆ’1,896,2932.91
15 Jan 20204,701,194โˆ’46,9435.35
31 Dec 20194,748,137+545,8635.54
13 Dec 20194,202,274โˆ’103,6655.67
29 Nov 20194,305,939+422,2754.62
15 Nov 20193,883,664+230,9314.98
31 Oct 20193,652,733+475,3373.54
15 Oct 20193,177,396+73,7573.98
30 Sep 20193,103,639+1,422,8683.23
13 Sep 20191,680,771โˆ’52,5672.17
30 Aug 20191,733,338โˆ’487,0872.70
15 Aug 20192,220,425+178,8221.67
31 Jul 20192,041,603โˆ’543,9893.15
15 Jul 20192,585,592โˆ’625,0462.74
28 Jun 20193,210,638โˆ’62,1864.58
14 Jun 20193,272,824สณ+1,104,6264.13
31 May 20192,168,198โˆ’1,684,9352.33
15 May 20193,853,133+31,2133.14
30 Apr 20193,821,920+107,7043.81
15 Apr 20193,714,216โˆ’156,5904.44
29 Mar 20193,870,806+743,4442.31
15 Mar 20193,127,362+227,4302.97
28 Feb 20192,899,932+50,1083.04
15 Feb 20192,849,824+324,0052.58
31 Jan 20192,525,819โˆ’881,7791.47
15 Jan 20193,407,598โˆ’525,8812.28
31 Dec 20183,933,479โˆ’477,4841.00
14 Dec 20184,410,963+261,5191.89
30 Nov 20184,149,444+325,3842.37
15 Nov 20183,824,060+480,0813.26
31 Oct 20183,343,979+327,9511.68
15 Oct 20183,016,028โˆ’65,1402.30
28 Sep 20183,081,168+222,1653.44
14 Sep 20182,859,003โˆ’37,3252.86
31 Aug 20182,896,328+231,1473.81
15 Aug 20182,665,181โˆ’485,2803.45
31 Jul 20183,150,461โˆ’334,9613.75
13 Jul 20183,485,422สณ+697,0262.86
29 Jun 20182,788,396+70,0971.98
15 Jun 20182,718,299+123,6791.85
31 May 20182,594,620โˆ’752,6713.15
15 May 20183,347,291+376,2224.64
30 Apr 20182,971,069+199,6343.10
13 Apr 20182,771,435+207,0422.52
29 Mar 20182,564,393โˆ’697,7051.56
15 Mar 20183,262,098+304,3932.98
28 Feb 20182,957,705+11,0312.81
15 Feb 20182,946,674+362,4331.16
31 Jan 20182,584,241โˆ’27,0952.16
12 Jan 20182,611,336สณโˆ’65,3442.88
29 Dec 20172,676,680โ€“2.32

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

Questions

Frequently asked questions

What is IWB's short interest?
1,416,381 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 154,752 from the previous settlement.
Why is there no percentage for IWB?
Because no defensible share count exists to divide by: exchange-traded product: its share count floats with creation and redemption. An exchange-traded product's share count changes every day as units are created and redeemed, so no filing gives a stable count to divide by. FINRA's shares-short figure is exact; a percentage of it would not be.
What is IWB's days to cover?
3.52 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 funds by shares short and days to cover: most shorted ETFs. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.