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HowShorted

PRQR short interest Nasdaq Capital Market

ProQR Therapeutics N.V. Ordina. 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
2,405,041
vs previous settlement
โˆ’55,622 (-2.3%)
days to cover
4.15
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for PRQR: 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
1,477
14 Sep 2026
Highest in window
161,628
3 Nov 2025
Days with a balance
37
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for ProQR Therapeutics N.V. Ordina 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 162K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20262,405,041โˆ’55,6224.15
31 Aug 20262,460,663+236,3122.08
14 Aug 20262,224,351+4,9313.00
31 Jul 20262,219,420โˆ’89,5342.76
15 Jul 20262,308,954+1,109,7401.75
30 Jun 20261,199,214+189,7141.00
15 Jun 20261,009,500+121,9261.78
29 May 2026887,574+21,9021.60
15 May 2026865,672+20,7001.75
30 Apr 2026844,972โˆ’416,3091.00
15 Apr 20261,261,281โˆ’406,1841.71
31 Mar 20261,667,465โˆ’15,5593.93
13 Mar 20261,683,024โˆ’21,8534.87
27 Feb 20261,704,877โˆ’77,5926.93
13 Feb 20261,782,469โˆ’3,3404.45
30 Jan 20261,785,809+572,4834.06
15 Jan 20261,213,326โˆ’35,3722.05
31 Dec 20251,248,698โˆ’25,0052.40
15 Dec 20251,273,703+211,0371.65
28 Nov 20251,062,666+284,5473.27
14 Nov 2025778,119+2,2002.43
31 Oct 2025775,919โˆ’1,316,8391.24
15 Oct 20252,092,758+930,7533.31
30 Sep 20251,162,005โˆ’44,0743.11
15 Sep 20251,206,079+656,4042.99
29 Aug 2025549,675+191,7551.54
15 Aug 2025357,920โˆ’17,1761.37
31 Jul 2025375,096โˆ’56,5441.72
15 Jul 2025431,640+81,0871.79
30 Jun 2025350,553โˆ’291,0801.00
13 Jun 2025641,633+57,4852.46
30 May 2025584,148+16,7061.66
15 May 2025567,442+191,4041.00
30 Apr 2025376,038โˆ’449,4161.00
15 Apr 2025825,454โˆ’17,6421.45
31 Mar 2025843,096โˆ’179,7461.00
14 Mar 20251,022,842+118,0111.77
28 Feb 2025904,831โˆ’61,0313.77
14 Feb 2025965,862+40,3773.60
31 Jan 2025925,485โˆ’86,9592.39
15 Jan 20251,012,444+94,3013.30
31 Dec 2024918,143+553,4441.41
13 Dec 2024364,699+177,1481.00
29 Nov 2024187,551โˆ’226,2141.00
15 Nov 2024413,765โˆ’263,8631.00
31 Oct 2024677,628+544,3301.00
15 Oct 2024133,298โˆ’15,5541.00
30 Sep 2024148,852โˆ’9,8341.09
13 Sep 2024158,686โˆ’7,1722.55
30 Aug 2024165,858โˆ’7,8331.20
15 Aug 2024173,691+11,1731.12
31 Jul 2024162,518โˆ’9,2052.07
15 Jul 2024171,723โˆ’1,4492.14
28 Jun 2024173,172โˆ’23,3741.39
14 Jun 2024196,546โˆ’44,6722.12
31 May 2024241,218+8,7283.19
15 May 2024232,490+17,2092.02
30 Apr 2024215,281โˆ’26,2421.41
15 Apr 2024241,523โˆ’19,5501.47
28 Mar 2024261,073โˆ’11,0591.83
15 Mar 2024272,132+8,2841.11
29 Feb 2024263,848โˆ’55,1641.26
15 Feb 2024319,012+17,7271.13
31 Jan 2024301,285โˆ’193,5151.00
12 Jan 2024494,800โˆ’185,5762.96
29 Dec 2023680,376โˆ’300,7403.07
15 Dec 2023981,116+351,2773.44
30 Nov 2023629,839+16,2922.81
15 Nov 2023613,547โˆ’60,6602.53
31 Oct 2023674,207โˆ’31,5425.45
13 Oct 2023705,749+19,8082.50
29 Sep 2023685,941โˆ’221,5733.60
15 Sep 2023907,514โˆ’33,3737.95
31 Aug 2023940,887โˆ’28,4938.91
15 Aug 2023969,380โˆ’189,1883.40
31 Jul 20231,158,568+690,9574.68
14 Jul 2023467,611โˆ’13,6812.07
30 Jun 2023481,292โˆ’43,8641.97
15 Jun 2023525,156โˆ’271,0741.28
31 May 2023796,230โˆ’569,5211.96
15 May 20231,365,751โˆ’697,1962.98
28 Apr 20232,062,947โˆ’514,8794.37
14 Apr 20232,577,826โˆ’111,9494.17
31 Mar 20232,689,775+1,068,4081.24
15 Mar 20231,621,367+289,0352.15
28 Feb 20231,332,332+192,6731.89
15 Feb 20231,139,659โˆ’344,9731.63
31 Jan 20231,484,632โˆ’368,4141.00
13 Jan 20231,853,046โˆ’143,6891.16
30 Dec 20221,996,735+1,006,5821.00
15 Dec 2022990,153+5341.00
30 Nov 2022989,619+303,8931.00
15 Nov 2022685,726โˆ’361,4841.00
31 Oct 20221,047,210โˆ’203,4702.41
14 Oct 20221,250,680+710,3951.54
30 Sep 2022540,285+190,7391.57
15 Sep 2022349,546+5,6831.86
31 Aug 2022343,863+21,5731.00
15 Aug 2022322,290+9,9571.00
29 Jul 2022312,333โˆ’23,6711.00
15 Jul 2022336,004โˆ’363,8771.05
30 Jun 2022699,881+175,5021.45
15 Jun 2022524,379โˆ’198,1101.00
31 May 2022722,489โˆ’304,5201.46
13 May 20221,027,009โˆ’123,9011.00
29 Apr 20221,150,910โˆ’446,4241.00
14 Apr 20221,597,334+340,7921.05
31 Mar 20221,256,542โˆ’120,5162.07
15 Mar 20221,377,058โˆ’640,5181.27
28 Feb 20222,017,576โˆ’1,211,7141.00
15 Feb 20223,229,290+1,023,7211.00
31 Jan 20222,205,569+990,7993.32
14 Jan 20221,214,770+381,3273.05
31 Dec 2021833,443+159,8431.86
15 Dec 2021673,600+40,2712.10
30 Nov 2021633,329โˆ’347,8482.36
15 Nov 2021981,177โˆ’710,1532.96
29 Oct 20211,691,330โˆ’254,1636.36
15 Oct 20211,945,493+146,2724.75
30 Sep 20211,799,221โˆ’49,4021.97
15 Sep 20211,848,623โˆ’259,2431.00
31 Aug 20212,107,866โˆ’231,7605.89
13 Aug 20212,339,626+528,5323.12
30 Jul 20211,811,094โˆ’9,9206.46
15 Jul 20211,821,014โˆ’83,6313.99
30 Jun 20211,904,645+247,6714.35
15 Jun 20211,656,974สณโˆ’305,4633.31
28 May 20211,962,437โˆ’603,9583.90
14 May 20212,566,395+989,4673.69
30 Apr 20211,576,928โˆ’479,3872.20
15 Apr 20212,056,315โˆ’553,8921.30
31 Mar 20212,610,207+1,447,3871.00
15 Mar 20211,162,820+263,4413.72
26 Feb 2021899,379โˆ’11,4871.88
12 Feb 2021910,866+40,0551.17
29 Jan 2021870,811โˆ’239,9691.00
15 Jan 20211,110,780+508,3153.77
31 Dec 2020602,465โˆ’386,2401.83
15 Dec 2020988,705โˆ’195,8982.65
30 Nov 20201,184,603+375,4082.85
13 Nov 2020809,195+104,9774.04
30 Oct 2020704,218+25,3292.35
15 Oct 2020678,889+17,7495.88
30 Sep 2020661,140โˆ’14,8176.83
15 Sep 2020675,957โˆ’11,8445.27
31 Aug 2020687,801+8485.65
14 Aug 2020686,953+10,3925.48
31 Jul 2020676,561+29,6543.97
15 Jul 2020646,907+18,3945.13
30 Jun 2020628,513+231,4185.40
15 Jun 2020397,095+15,8602.80
29 May 2020381,235โˆ’104,8003.51
15 May 2020486,035สณโˆ’53,0932.97
30 Apr 2020539,128โˆ’35,8684.11
15 Apr 2020574,996โˆ’43,0352.54
31 Mar 2020618,031โˆ’70,7663.15
13 Mar 2020688,797+102,9853.50
28 Feb 2020585,812โˆ’10,5172.49
14 Feb 2020596,329โˆ’132,6863.46
31 Jan 2020729,015โˆ’1,8764.07
15 Jan 2020730,891โˆ’327,6693.58
31 Dec 20191,058,560+78,7363.19
13 Dec 2019979,824โˆ’197,5194.44
29 Nov 20191,177,343โˆ’48,2872.23
15 Nov 20191,225,630+161,8905.14
31 Oct 20191,063,740โˆ’369,2062.38
15 Oct 20191,432,946+6,3765.68
30 Sep 20191,426,570โˆ’104,30416.10
13 Sep 20191,530,874โˆ’869,4366.51
30 Aug 20192,400,310โˆ’252,37216.15
15 Aug 20192,652,682+198,31722.73
31 Jul 20192,454,365+273,04817.66
15 Jul 20192,181,317โˆ’275,7947.30
28 Jun 20192,457,111+37,93711.19
14 Jun 20192,419,174สณโˆ’185,52121.31
31 May 20192,604,695+19,83814.12
15 May 20192,584,857โˆ’458,28018.76
30 Apr 20193,043,137+47114.06
15 Apr 20193,042,666+94,60517.32
29 Mar 20192,948,061+196,48216.31
15 Mar 20192,751,579+336,47111.75
28 Feb 20192,415,108โˆ’63,4814.55
15 Feb 20192,478,589+131,82814.83
31 Jan 20192,346,761+185,53615.06
15 Jan 20192,161,225+298,4776.60
31 Dec 20181,862,748+799,5362.64
14 Dec 20181,063,212+221,0403.54
30 Nov 2018842,172โˆ’115,3822.25
15 Nov 2018957,554โˆ’27,8542.49
31 Oct 2018985,408+371,8573.87
15 Oct 2018613,551+30,4393.91
28 Sep 2018583,112+266,1351.50
14 Sep 2018316,977+255,9151.00
31 Aug 201861,062โˆ’43,8601.00
15 Aug 2018104,922โˆ’31,5351.49
31 Jul 2018136,457+11,3802.33
13 Jul 2018125,077โˆ’6,5052.31
29 Jun 2018131,582โˆ’3851.82
15 Jun 2018131,967+42,8821.00
31 May 201889,085+18,7221.00
15 May 201870,363+6,2161.39
30 Apr 201864,147+30,3221.18
13 Apr 201833,825โˆ’8,2731.00
29 Mar 201842,098โˆ’5,8491.25
15 Mar 201847,947โˆ’7,7291.00
28 Feb 201855,676โˆ’6,1831.47
15 Feb 201861,859+20,7421.00
31 Jan 201841,117โˆ’32,7561.00
12 Jan 201873,873+5,0041.00
29 Dec 201768,869โ€“1.00

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

Questions

Frequently asked questions

What is PRQR's short interest?
2,405,041 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 55,622 from the previous settlement.
Why is there no percentage for PRQR?
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 PRQR's days to cover?
4.15 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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