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HowShorted

ARQQ short interest Nasdaq Capital Market

Arqit Quantum Inc. Ordinary Sh. 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
2,439,615
vs previous settlement
−161,725 (-6.2%)
days to cover
5.78
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for ARQQ: 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
3,244
14 Sep 2026
Highest in window
677,974
22 Jun 2026
Days with a balance
173
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Arqit Quantum Inc. Ordinary Sh 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 678K shares.

History

Every FINRA settlement we hold for ARQQ, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20262,439,615−161,7255.78
31 Aug 20262,601,340−117,00710.01
14 Aug 20262,718,347−180,2669.80
31 Jul 20262,898,613−379,5738.82
15 Jul 20263,278,186+49,3644.99
30 Jun 20263,228,822+1,133,1521.55
15 Jun 20262,095,670+384,9892.57
29 May 20261,710,681+176,8361.81
15 May 20261,533,845+306,6183.60
30 Apr 20261,227,227+192,7142.81
15 Apr 20261,034,513−29,9113.57
31 Mar 20261,064,424+15,1466.08
13 Mar 20261,049,278−16,8915.49
27 Feb 20261,066,169−38,1975.19
13 Feb 20261,104,366+78,5993.80
30 Jan 20261,025,767+106,7094.09
15 Jan 2026919,058−83,6602.74
31 Dec 20251,002,718+85,8302.79
15 Dec 2025916,888+46,5482.63
28 Nov 2025870,340+125,7402.22
14 Nov 2025744,600+15,5871.25
31 Oct 2025729,013+142,8781.00
15 Oct 2025586,135−210,6581.00
30 Sep 2025796,793−88,9201.05
15 Sep 2025885,713+185,2562.91
29 Aug 2025700,457−128,8652.59
15 Aug 2025829,322+101,7102.00
31 Jul 2025727,612−21,1361.00
15 Jul 2025748,748+263,8701.00
30 Jun 2025484,878+201,6561.00
13 Jun 2025283,222−199,5631.00
30 May 2025482,785−117,1771.00
15 May 2025599,962+41,2731.55
30 Apr 2025558,689+19,6922.58
15 Apr 2025538,997+11,2512.06
31 Mar 2025527,746+53,6031.00
14 Mar 2025474,143−13,6621.89
28 Feb 2025487,805−26,8041.39
14 Feb 2025514,609−24,4341.26
31 Jan 2025539,043+153,7551.00
15 Jan 2025385,288−62,0861.00
31 Dec 2024447,374+149,2161.00
13 Dec 2024298,158−116,9561.00
29 Nov 2024415,114+192,7731.00
15 Nov 2024222,341+71,8131.04
31 Oct 2024150,528+19,5611.00
15 Oct 2024130,967+9,7411.86
30 Sep 2024121,226−1,574,0251.00
13 Sep 20241,695,251+258,0143.28
30 Aug 20241,437,237+84,4272.22
15 Aug 20241,352,810−284,0202.45
31 Jul 20241,636,830−526,9711.76
15 Jul 20242,163,801−920,0501.64
28 Jun 20243,083,851−531,7772.72
14 Jun 20243,615,628−175,9856.13
31 May 20243,791,613−508,4213.06
15 May 20244,300,034+886,9132.27
30 Apr 20243,413,121−336,2161.00
15 Apr 20243,749,337−788,4163.17
28 Mar 20244,537,753+110,5858.78
15 Mar 20244,427,168+1,584,7303.21
29 Feb 20242,842,438+415,7732.23
15 Feb 20242,426,665+205,3542.10
31 Jan 20242,221,311+138,4285.28
12 Jan 20242,082,883+193,8673.17
29 Dec 20231,889,016−449,0212.99
15 Dec 20232,338,037−95,5153.35
30 Nov 20232,433,552+1,331,5533.92
15 Nov 20231,101,999+153,6071.00
31 Oct 2023948,392+85,4841.70
13 Oct 2023862,908−302,1301.35
29 Sep 20231,165,038−475,5101.36
15 Sep 20231,640,548+772,8751.00
31 Aug 2023867,673−251,1801.48
15 Aug 20231,118,853−183,6281.00
31 Jul 20231,302,481−130,5041.09
14 Jul 20231,432,985−176,6991.21
30 Jun 20231,609,684+132,1731.19
15 Jun 20231,477,511−247,0461.00
31 May 20231,724,557+118,9131.00
15 May 20231,605,644+686,0712.07
28 Apr 2023919,573−118,5762.33
14 Apr 20231,038,149−343,7801.18
31 Mar 20231,381,929−325,4361.00
15 Mar 20231,707,365+425,9581.03
28 Feb 20231,281,407−459,7611.00
15 Feb 20231,741,168+814,7101.00
31 Jan 2023926,458−7,9711.00
13 Jan 2023934,429−4,2241.11
30 Dec 2022938,653−864,0262.01
15 Dec 20221,802,679−158,3916.47
30 Nov 20221,961,070−690,38712.00
15 Nov 20222,651,457+1,898,9391.41
31 Oct 2022752,518−93,2585.61
14 Oct 2022845,776−116,2995.79
30 Sep 2022962,075+165,4002.70
15 Sep 2022796,675+326,2471.00
31 Aug 2022470,428−37,6307.16
15 Aug 2022508,058−85,6045.32
29 Jul 2022593,662+46,6289.04
15 Jul 2022547,034−103,5186.88
30 Jun 2022650,552−130,3302.83
15 Jun 2022780,882−14,5204.16
31 May 2022795,402−145,6565.25
13 May 2022941,058−254,9083.21
29 Apr 20221,195,966−108,8952.31
14 Apr 20221,304,861−299,9546.33
31 Mar 20221,604,815+379,0352.46
15 Mar 20221,225,780−516,0202.94
28 Feb 20221,741,800+201,7434.54
15 Feb 20221,540,057+181,8963.48
31 Jan 20221,358,161+316,4393.90
14 Jan 20221,041,722−17,0372.58
31 Dec 20211,058,759+370,2271.60
15 Dec 2021688,532−213,3841.00
30 Nov 2021901,916+152,4861.00
15 Nov 2021749,430+11,5241.34
29 Oct 2021737,906−3,3311.00
15 Oct 2021741,237+382,3981.00
30 Sep 2021358,839+33,3181.00
15 Sep 2021325,521–1.00

Scroll inside the table for earlier settlements, back to 15 Sep 2021.

Questions

Frequently asked questions

What is ARQQ's short interest?
2,439,615 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 161,725 from the previous settlement.
Why is there no percentage for ARQQ?
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 ARQQ's days to cover?
5.78 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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