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HowShorted

BCYC short interest Nasdaq Global Market

Bicycle Therapeutics plc Ameri. 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
3,331,791
vs previous settlement
+50,392 (+1.5%)
days to cover
6.68
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for BCYC: 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
202
10 Sep 2026
Highest in window
47,619
6 Jan 2026
Days with a balance
43
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Bicycle Therapeutics plc Ameri 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 48K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20263,331,791+50,3926.68
31 Aug 20263,281,399+56,94613.77
14 Aug 20263,224,453+240,56410.21
31 Jul 20262,983,889+9709.89
15 Jul 20262,982,919+99,1177.68
30 Jun 20262,883,802+58,2064.75
15 Jun 20262,825,596โˆ’35,8194.36
29 May 20262,861,415+159,70710.81
15 May 20262,701,708โˆ’224,6637.57
30 Apr 20262,926,371+291,1537.88
15 Apr 20262,635,218+342,4915.93
31 Mar 20262,292,727+101,3453.29
13 Mar 20262,191,382+76,0076.43
27 Feb 20262,115,375โˆ’19,9765.99
13 Feb 20262,135,351+146,3743.98
30 Jan 20261,988,977+34,0068.63
15 Jan 20261,954,971โˆ’38,7487.33
31 Dec 20251,993,719โˆ’5,3068.84
15 Dec 20251,999,025+285,7687.69
28 Nov 20251,713,257+53,8725.22
14 Nov 20251,659,385+161,0653.78
31 Oct 20251,498,320โˆ’38,1605.75
15 Oct 20251,536,480โˆ’8,9894.76
30 Sep 20251,545,469+83,9835.25
15 Sep 20251,461,486โˆ’124,7076.28
29 Aug 20251,586,193โˆ’59,3447.50
15 Aug 20251,645,537โˆ’15,4305.76
31 Jul 20251,660,967โˆ’512,9305.44
15 Jul 20252,173,897โˆ’422,6947.22
30 Jun 20252,596,591+113,4718.59
13 Jun 20252,483,120โˆ’966,46911.27
30 May 20253,449,589+120,57914.16
15 May 20253,329,010+264,0758.17
30 Apr 20253,064,935โˆ’70,0339.15
15 Apr 20253,134,968โˆ’1,169,8986.33
31 Mar 20254,304,866โˆ’95,50612.41
14 Mar 20254,400,372+182,09514.02
28 Feb 20254,218,277โˆ’45,02418.56
14 Feb 20254,263,301โˆ’37,14617.66
31 Jan 20254,300,447+23,05413.04
15 Jan 20254,277,393+338,53311.12
31 Dec 20243,938,860+505,1865.00
13 Dec 20243,433,674+43,6333.62
29 Nov 20243,390,041โˆ’134,6816.22
15 Nov 20243,524,722+258,1609.07
31 Oct 20243,266,562+346,0686.95
15 Oct 20242,920,494+272,5435.93
30 Sep 20242,647,951+286,8586.30
13 Sep 20242,361,093+258,6255.01
30 Aug 20242,102,468โˆ’101,9658.64
15 Aug 20242,204,433+135,2987.48
31 Jul 20242,069,135โˆ’621,70911.75
15 Jul 20242,690,844โˆ’124,03513.24
28 Jun 20242,814,879+36,69013.01
14 Jun 20242,778,189+162,5458.90
31 May 20242,615,644โˆ’269,7085.79
15 May 20242,885,352+96,2579.97
30 Apr 20242,789,095โˆ’171,2978.04
15 Apr 20242,960,392+417,8496.64
28 Mar 20242,542,543โˆ’12,9866.67
15 Mar 20242,555,529โˆ’209,3836.93
29 Feb 20242,764,912โˆ’622,5326.78
15 Feb 20243,387,444โˆ’396,4959.03
31 Jan 20243,783,939โˆ’69,54611.52
12 Jan 20243,853,485โˆ’16,56413.89
29 Dec 20233,870,049โˆ’169,7987.77
15 Dec 20234,039,847โˆ’111,1354.58
30 Nov 20234,150,982+153,9779.53
15 Nov 20233,997,005สณโˆ’374,6625.96
31 Oct 20234,371,667โˆ’55,9088.70
13 Oct 20234,427,575โˆ’354,10813.71
29 Sep 20234,781,683+256,24717.94
15 Sep 20234,525,436+151,4008.67
31 Aug 20234,374,036+313,27816.48
15 Aug 20234,060,758+315,77311.98
31 Jul 20233,744,985โˆ’568,48718.58
14 Jul 20234,313,472+68,56711.11
30 Jun 20234,244,905+70,31727.19
15 Jun 20234,174,588โˆ’21,23026.99
31 May 20234,195,818โˆ’45,69640.30
15 May 20234,241,514+561,96419.99
28 Apr 20233,679,550+179,82619.30
14 Apr 20233,499,724+10,9449.89
31 Mar 20233,488,780+436,0277.54
15 Mar 20233,052,753โˆ’87,99610.01
28 Feb 20233,140,749+1,099,2789.21
15 Feb 20232,041,471+166,2824.49
31 Jan 20231,875,189+5,1827.99
13 Jan 20231,870,007โˆ’109,8548.90
30 Dec 20221,979,861โˆ’231,79710.35
15 Dec 20222,211,658โˆ’368,5236.73
30 Nov 20222,580,181+29,57115.56
15 Nov 20222,550,610โˆ’239,4058.17
31 Oct 20222,790,015โˆ’490,84416.36
14 Oct 20223,280,859+223,05717.41
30 Sep 20223,057,802+144,01015.84
15 Sep 20222,913,792+40,05810.47
31 Aug 20222,873,734+1,61413.45
15 Aug 20222,872,120โˆ’34,93113.81
29 Jul 20222,907,051โˆ’65,94812.98
15 Jul 20222,972,999+296,1188.79
30 Jun 20222,676,881+421,7257.27
15 Jun 20222,255,156โˆ’151,3385.10
31 May 20222,406,494โˆ’66,1664.69
13 May 20222,472,660+534,3693.84
29 Apr 20221,938,291+191,1823.85
14 Apr 20221,747,109+1,216,7791.14
31 Mar 2022530,330+74,0812.02
15 Mar 2022456,249โˆ’17,8091.67
28 Feb 2022474,058โˆ’7,6423.58
15 Feb 2022481,700โˆ’43,8324.32
31 Jan 2022525,532+150,5932.03
14 Jan 2022374,939โˆ’181,9571.47
31 Dec 2021556,896+38,4952.49
15 Dec 2021518,401+27,0572.22
30 Nov 2021491,344+10,5742.14
15 Nov 2021480,770+37,3642.02
29 Oct 2021443,406+136,4891.69
15 Oct 2021306,917โˆ’151,8231.00
30 Sep 2021458,740+27,7942.29
15 Sep 2021430,946โˆ’36,3021.63
31 Aug 2021467,248+39,6494.18
13 Aug 2021427,599โˆ’52,5803.15
30 Jul 2021480,179+19,9832.62
15 Jul 2021460,196+31,5452.02
30 Jun 2021428,651โˆ’6916.08
15 Jun 2021429,342สณ+2,32410.50
28 May 2021427,018โˆ’3,98511.41
14 May 2021431,003+27,0254.96
30 Apr 2021403,978โˆ’53,3355.98
15 Apr 2021457,313+26,3231.68
31 Mar 2021430,990โˆ’10,4703.33
15 Mar 2021441,460+41,3803.76
26 Feb 2021400,080+2,9411.67
12 Feb 2021397,139+27,4825.76
29 Jan 2021369,657+16,3571.99
15 Jan 2021353,300+20,5072.04
31 Dec 2020332,793+21,1739.08
15 Dec 2020311,620+13,3885.77
30 Nov 2020298,232+23,0939.74
13 Nov 2020275,139+1,4374.49
30 Oct 2020273,702+12,4886.00
15 Oct 2020261,214+29,9293.27
30 Sep 2020231,285+43,1062.38
15 Sep 2020188,179+33,8431.50
31 Aug 2020154,336+23,1246.71
14 Aug 2020131,212+23,1769.46
31 Jul 2020108,036+4,7854.60
15 Jul 2020103,251+2,5041.00
30 Jun 2020100,747โˆ’1592.23
15 Jun 2020100,906โˆ’3,6907.40
29 May 2020104,596+2,6213.17
15 May 2020101,975+4,1345.26
30 Apr 202097,841+72,4703.37
15 Apr 202025,371+2,5461.72
31 Mar 202022,825+17,8631.00
13 Mar 20204,962โˆ’1,6181.00
28 Feb 20206,580+9911.00
14 Feb 20205,589โˆ’4,2341.00
31 Jan 20209,823+1,3251.52
15 Jan 20208,498โˆ’3,4861.00
31 Dec 201911,984โˆ’1,3291.00
13 Dec 201913,313โˆ’30,4541.00
29 Nov 201943,767โˆ’7,5703.02
15 Nov 201951,337+15,9904.18
31 Oct 201935,347+8,03310.37
15 Oct 201927,314โˆ’7,9611.36
30 Sep 201935,275+2,8951.00
13 Sep 201932,380+4,7761.00
30 Aug 201927,604+1,4322.20
15 Aug 201926,172โˆ’6851.64
31 Jul 201926,857+3842.23
15 Jul 201926,473โˆ’9,7381.00
28 Jun 201936,211+29,0661.00
14 Jun 20197,145+4,9111.00
31 May 20192,234โ€“1.00

Scroll inside the table for earlier settlements, back to 31 May 2019.

Questions

Frequently asked questions

What is BCYC's short interest?
3,331,791 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 50,392 from the previous settlement.
Why is there no percentage for BCYC?
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 BCYC's days to cover?
6.68 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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