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HowShorted

How shorted is Aclaris Therapeutics, Inc.? ACRS

#563most shorted US stockof 3,805 ranked stocks, more shorted than 85%

10.92%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
+0.61
5 reports (~10 weeks)
+2.75
days to cover
6.38
Aggregate net short position time series for Aclaris Therapeutics, Inc.

Markers along the chart's base: ▲ results announced (an 8-K reporting results was filed) ▲ quarterly or annual report filed. Dates are SEC filing dates; hover a point to see events since the previous settlement.

Days to cover

FINRA's own figure: reported shares short divided by the stock's average daily trading volume, published alongside each settlement. It expresses the short position in days of typical trading rather than as a percentage of the company; the two can move differently.

Aggregate net short position time series for Aclaris Therapeutics, Inc. days to cover

Short interest around results

For each results announcement (an 8-K reporting results, by its SEC filing date), the FINRA settlement before it and the first one after. Settlements fall twice a month, so the two figures can sit up to a month apart and much else changes in between: this shows what was reported, not why.

Reported short interest before and after each results announcement
Results filedSettlement beforeSettlement afterChange
6 Aug 20269.36% 31 Jul 20269.99% 14 Aug 2026+0.63
7 May 20265.65% 30 Apr 20265.26% 15 May 2026−0.39
26 Feb 20264.04% 13 Feb 20263.95% 27 Feb 2026−0.09
6 Nov 20253.91% 31 Oct 20253.60% 14 Nov 2025−0.31
7 Aug 20256.05% 31 Jul 20255.52% 15 Aug 2025−0.53
8 May 20254.11% 30 Apr 20254.22% 15 May 2025+0.11
27 Feb 20254.65% 14 Feb 20254.42% 28 Feb 2025−0.23
6 Nov 20243.37% 31 Oct 20242.18% 15 Nov 2024−1.19

Fails to deliver

The SEC's fails-to-deliver figure for ACRS: 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
895
4 Sep 2026
Highest in window
397,076
28 Jul 2026
Days with a balance
38
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Aclaris Therapeutics, Inc. 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 397K shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 202610.92%+0.61
31 Aug 202610.31%+0.32
14 Aug 20269.99%+0.63
31 Jul 20269.36%−0.20
15 Jul 20269.56%+1.39
30 Jun 20268.17%+1.80
15 Jun 20266.37%+0.59
29 May 20265.78%+0.52
15 May 20265.26%−0.39
30 Apr 20265.65%−0.22
15 Apr 20265.87%+0.05
31 Mar 20265.82%+1.92
13 Mar 20263.90%−0.05
27 Feb 20263.95%−0.09
13 Feb 20264.04%−0.10
30 Jan 20264.14%−0.62
15 Jan 20264.76%+0.75
31 Dec 20254.01%+0.52
15 Dec 20253.49%−0.24
28 Nov 20253.73%+0.13
14 Nov 20253.60%−0.31
31 Oct 20253.91%−0.42
15 Oct 20254.33%−0.79
30 Sep 20255.12%−0.25
15 Sep 20255.37%−0.09
29 Aug 20255.46%−0.06
15 Aug 20255.52%−0.53
31 Jul 20256.05%−1.13
15 Jul 20257.18%+0.27
30 Jun 20256.91%+2.44
13 Jun 20254.47%+0.13
30 May 20254.34%+0.12
15 May 20254.22%+0.11
30 Apr 20254.11%+0.34
15 Apr 20253.77%−2.01
31 Mar 20255.78%+0.20
14 Mar 20255.58%+1.16
28 Feb 20254.42%−0.23
14 Feb 20254.65%+1.02
31 Jan 20253.63%−1.11
15 Jan 20254.74%−0.25
31 Dec 20244.99%+0.56
13 Dec 20244.43%+0.96
29 Nov 20243.47%+1.29
15 Nov 20242.18%−1.19
31 Oct 20243.37%+1.42
15 Oct 20241.95%−0.47
30 Sep 20242.42%+0.02
13 Sep 20242.40%−0.01
30 Aug 20242.41%−0.11
15 Aug 20242.52%−0.09
31 Jul 20242.61%−0.42
15 Jul 20243.03%−2.50
28 Jun 20245.53%−0.73
14 Jun 20246.26%−0.21
31 May 20246.47%−0.36
15 May 20246.83%−1.51
30 Apr 20248.34%+1.30
15 Apr 20247.04%+0.15
28 Mar 20246.89%−0.33
15 Mar 20247.22%−1.38
29 Feb 20248.60%+0.37
15 Feb 20248.23%−0.69
31 Jan 20248.92%−0.05
12 Jan 20248.97%+0.80
29 Dec 20238.17%−0.18
15 Dec 20238.35%+1.62
30 Nov 20236.73%−3.71
15 Nov 202310.44%+1.16
31 Oct 20239.28%+0.74
13 Oct 20238.54%+0.17
29 Sep 20238.37%−0.83
15 Sep 20239.20%+1.15
31 Aug 20238.05%+0.76
15 Aug 20237.29%−0.06
31 Jul 20237.35%+0.27
14 Jul 20237.08%−0.38
30 Jun 20237.46%+0.90
15 Jun 20236.56%−0.17
31 May 20236.73%+0.16
15 May 20236.57%−0.38
28 Apr 20236.95%−0.52
14 Apr 20237.47%+0.27
31 Mar 20237.20%+0.93
15 Mar 20236.27%+1.32
28 Feb 20234.95%+0.40
15 Feb 20234.55%+0.58
31 Jan 20233.97%−0.29
13 Jan 20234.26%−0.23
30 Dec 20224.49%+0.50
15 Dec 20223.99%−0.16
30 Nov 20224.15%−0.68
15 Nov 20224.83%−0.69
31 Oct 20225.52%−0.29
14 Oct 20225.81%+0.39
30 Sep 20225.42%+0.47
15 Sep 20224.95%+0.24
31 Aug 20224.71%−0.52
15 Aug 20225.23%−0.09
29 Jul 20225.32%−0.52
15 Jul 20225.84%+0.18
30 Jun 20225.66%+0.30
15 Jun 20225.36%+0.08
31 May 20225.28%+1.43
13 May 20223.85%+0.65
29 Apr 20223.20%−0.59
14 Apr 20223.79%−0.74
31 Mar 20224.53%+0.09
15 Mar 20224.44%+0.15
28 Feb 20224.29%+0.53
15 Feb 20223.76%+0.37
31 Jan 20223.39%+0.23
14 Jan 20223.16%−0.19
31 Dec 20213.35%+0.01
15 Dec 20213.34%+0.27
30 Nov 20213.07%−0.01
15 Nov 20213.08%−0.57
29 Oct 20213.65%−0.86
15 Oct 20214.51%−0.75
30 Sep 20215.26%+0.44
15 Sep 20214.82%+0.36
31 Aug 20214.46%−0.66
13 Aug 20215.12%+0.04
30 Jul 20215.08%−1.65
15 Jul 20216.73%−1.03
30 Jun 20217.76%+2.95
15 Jun 20214.81%+1.18
28 May 20213.63%0.00
14 May 20213.63%+0.33
30 Apr 20213.30%+0.45
15 Apr 20212.85%+1.09
31 Mar 20211.76%+0.52
15 Mar 20211.24%−0.23
26 Feb 20211.47%−1.33
12 Feb 20212.80%+0.59
29 Jan 20212.21%+0.90
15 Jan 20211.31%−0.29
31 Dec 20201.60%+0.47
15 Dec 20201.13%−0.16
30 Nov 20201.29%−0.14
13 Nov 20201.43%−0.17
30 Oct 20201.60%+0.09
15 Oct 20201.51%−0.11
30 Sep 20201.62%+0.24
15 Sep 20201.38%−0.19
31 Aug 20201.57%−0.39
14 Aug 20201.96%−0.32
31 Jul 20202.28%−0.68
15 Jul 20202.96%−0.31
30 Jun 20203.27%−0.91
15 Jun 20204.18%+0.01
29 May 20204.17%−0.50
15 May 20204.67%−0.42
30 Apr 20205.09%−0.75
15 Apr 20205.84%−3.54
31 Mar 20209.38%−3.13
13 Mar 202012.51%+2.19
28 Feb 202010.32%+0.53
14 Feb 20209.79%+1.54
31 Jan 20208.25%+0.86
15 Jan 20207.39%−1.49
31 Dec 20198.88%−0.55
13 Dec 20199.43%−2.53
29 Nov 201911.96%−0.09
15 Nov 201912.05%−2.52
31 Oct 201914.57%+4.27
15 Oct 201910.30%+3.94
30 Sep 20196.36%−0.82
13 Sep 20197.18%−0.28
30 Aug 20197.46%+0.33
15 Aug 20197.13%+2.02
31 Jul 20195.11%+0.03
15 Jul 20195.08%−2.04
28 Jun 20197.12%−0.06
14 Jun 20197.18%+0.17
31 May 20197.01%+0.02
15 May 20196.99%−0.34
30 Apr 20197.33%−0.49
15 Apr 20197.82%−0.12
29 Mar 20197.94%−0.41
15 Mar 20198.35%+0.13
28 Feb 20198.22%+0.26
15 Feb 20197.96%−0.09
31 Jan 20198.05%+0.94
15 Jan 20197.11%+0.01
31 Dec 20187.10%+1.67
14 Dec 20185.43%−0.30
30 Nov 20185.73%−1.24
15 Nov 20186.97%−3.36
31 Oct 201810.33%−1.74
15 Oct 201812.07%−0.94
28 Sep 201813.01%−0.90
14 Sep 201813.91%−0.10
31 Aug 201814.01%−0.96
15 Aug 201814.97%−1.39
31 Jul 201816.36%−0.85
13 Jul 201817.21%−0.21
29 Jun 201817.42%+0.01
15 Jun 201817.41%−0.05
31 May 201817.46%−0.37
15 May 201817.83%−0.09
30 Apr 201817.92%+0.83
13 Apr 201817.09%+0.87
29 Mar 201816.22%−0.82
15 Mar 201817.04%+1.65
28 Feb 201815.39%+0.36
15 Feb 201815.03%+4.12
31 Jan 201810.91%+0.06
12 Jan 201810.85%+0.08
29 Dec 201710.77%–

Newest first. Scroll inside the table for earlier dates, back to 29 Dec 2017.

Frequently asked questions

How shorted is Aclaris Therapeutics, Inc. right now?
10.92% of Aclaris Therapeutics, Inc.'s (ACRS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 563rd most shorted US stock, out of 3,805 we rank.
What does this number include?
FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?
US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Is this ACRS's short float?
No. This is short interest as a percentage of shares outstanding, the count in the company's SEC filings. "Short float" divides the same FINRA short count by the public float, which excludes closely held shares, so it comes out higher for the same company. We publish no float estimates: the float is not a regulatory figure.
What is ACRS's days to cover?
6.38 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume. It is published in the same FINRA file and shown verbatim; we hold no volume data ourselves.
Which funds are short?
US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.