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HowShorted

How shorted is Arbutus Biopharma Corporation? ABUS

#769most shorted US stockof 3,805 ranked stocks, more shorted than 79%

9.34%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.22
5 reports (~10 weeks)
+0.59
days to cover
5.01
Aggregate net short position time series for Arbutus Biopharma Corporation

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 Arbutus Biopharma Corporation 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
12 Aug 202610.35% 31 Jul 20269.33% 14 Aug 2026−1.02
13 May 20269.08% 30 Apr 20268.41% 15 May 2026−0.67
23 Mar 20268.53% 13 Mar 20268.27% 31 Mar 2026−0.26
13 Nov 20255.17% 31 Oct 20255.49% 14 Nov 2025+0.32
6 Aug 20256.78% 31 Jul 20256.53% 15 Aug 2025−0.25
14 May 20255.84% 30 Apr 20256.01% 15 May 2025+0.17
27 Mar 20255.05% 14 Mar 20255.14% 31 Mar 2025+0.09
13 Jan 20253.14% 31 Dec 20243.50% 15 Jan 2025+0.36

Fails to deliver

The SEC's fails-to-deliver figure for ABUS: 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
903
14 Sep 2026
Highest in window
1,590,221
20 Nov 2025
Days with a balance
68
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Arbutus Biopharma Corporation 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 1.6M shares.

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Sector: Healthcare

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20269.34%−0.22
31 Aug 20269.56%+0.23
14 Aug 20269.33%−1.02
31 Jul 202610.35%+0.30
15 Jul 202610.05%+1.30
30 Jun 20268.75%−0.21
15 Jun 20268.96%+0.27
29 May 20268.69%+0.28
15 May 20268.41%−0.67
30 Apr 20269.08%−0.03
15 Apr 20269.11%+0.84
31 Mar 20268.27%−0.26
13 Mar 20268.53%+0.86
27 Feb 20267.67%−0.13
13 Feb 20267.80%+0.75
30 Jan 20267.05%+0.26
15 Jan 20266.79%+0.27
31 Dec 20256.52%+0.94
15 Dec 20255.58%−0.25
28 Nov 20255.83%+0.34
14 Nov 20255.49%+0.32
31 Oct 20255.17%+0.02
15 Oct 20255.15%−0.14
30 Sep 20255.29%−0.53
15 Sep 20255.82%+0.32
29 Aug 20255.50%−1.03
15 Aug 20256.53%−0.25
31 Jul 20256.78%−0.34
15 Jul 20257.12%−0.07
30 Jun 20257.19%+0.48
13 Jun 20256.71%+0.05
30 May 20256.66%+0.65
15 May 20256.01%+0.17
30 Apr 20255.84%+0.07
15 Apr 20255.77%+0.63
31 Mar 20255.14%+0.09
14 Mar 20255.05%+0.61
28 Feb 20254.44%+0.63
14 Feb 20253.81%+0.26
31 Jan 20253.55%+0.05
15 Jan 20253.50%+0.36
31 Dec 20243.14%−0.01
13 Dec 20243.15%+0.08
29 Nov 20243.07%−0.13
15 Nov 20243.20%−0.27
31 Oct 20243.47%−0.66
15 Oct 20244.13%+0.23
30 Sep 20243.90%+0.42
13 Sep 20243.48%+0.27
30 Aug 20243.21%−0.31
15 Aug 20243.52%−0.08
31 Jul 20243.60%−0.12
15 Jul 20243.72%+0.54
28 Jun 20243.18%+0.33
14 Jun 20242.85%+0.19
31 May 20242.66%−0.17
15 May 20242.83%−0.25
30 Apr 20243.08%0.00
15 Apr 20243.08%+0.37
28 Mar 20242.71%+0.25
15 Mar 20242.46%+0.04
29 Feb 20242.42%+0.22
15 Feb 20242.20%−1.45
31 Jan 20243.65%−0.18
12 Jan 20243.83%+0.12
29 Dec 20233.71%+0.02
15 Dec 20233.69%0.00
30 Nov 20233.69%−0.33
15 Nov 20234.02%+0.25
31 Oct 20233.77%+0.32
13 Oct 20233.45%−0.65
29 Sep 20234.10%+0.64
15 Sep 20233.46%+0.37
31 Aug 20233.09%+0.02
15 Aug 20233.07%+0.06
31 Jul 20233.01%+0.02
14 Jul 20232.99%−0.02
30 Jun 20233.01%+0.34
15 Jun 20232.67%+0.06
31 May 20232.61%−0.03
15 May 20232.64%+0.20
28 Apr 20232.44%−0.18
14 Apr 20232.62%−0.42
31 Mar 20233.04%+0.15
15 Mar 20232.89%+0.40
28 Feb 20232.49%−0.06
15 Feb 20232.55%−0.21
31 Jan 20232.76%−0.25
13 Jan 20233.01%−0.02
30 Dec 20223.03%+0.57
15 Dec 20222.46%−0.11
30 Nov 20222.57%+0.18
15 Nov 20222.39%−0.39
31 Oct 20222.78%−0.02
14 Oct 20222.80%+0.06
30 Sep 20222.74%+0.19
15 Sep 20222.55%−0.07
31 Aug 20222.62%−0.32
15 Aug 20222.94%−0.27
29 Jul 20223.21%−0.25
15 Jul 20223.46%−0.08
30 Jun 20223.54%+0.23
15 Jun 20223.31%−0.28
31 May 20223.59%+0.22
13 May 20223.37%−0.21
29 Apr 20223.58%−0.32
14 Apr 20223.90%−0.58
31 Mar 20224.48%+0.02
15 Mar 20224.46%−0.91
28 Feb 20225.37%+0.15
15 Feb 20225.22%+0.21
31 Jan 20225.01%+2.11
14 Jan 20222.90%−0.46
31 Dec 20213.36%+1.68
30 Nov 20211.68%−0.08
15 Nov 20211.76%−1.07
29 Oct 20212.83%+0.03
15 Oct 20212.80%0.00
30 Sep 20212.80%−0.93
15 Sep 20213.73%−0.24
31 Aug 20213.97%−0.22
13 Aug 20214.19%−1.69
30 Jul 20215.88%+0.77
15 Jul 20215.11%−0.54
30 Jun 20215.65%+1.90
15 Jun 20213.75%−0.63
28 May 20214.38%−0.44
14 May 20214.82%+0.78
30 Apr 20214.04%−0.38
15 Apr 20214.42%+0.09
31 Mar 20214.33%+0.25
15 Mar 20214.08%+0.23
26 Feb 20213.85%+0.85
12 Feb 20213.00%−0.75
29 Jan 20213.75%−1.02
15 Jan 20214.77%−0.90
31 Dec 20205.67%+2.20
15 Dec 20203.47%+0.95
30 Nov 20202.52%−0.05
13 Nov 20202.57%−0.71
30 Oct 20203.28%+0.80
15 Oct 20202.48%−1.42
30 Sep 20203.90%+0.18
15 Sep 20203.72%+0.48
31 Aug 20203.24%−0.02
14 Aug 20203.26%+2.15
15 Jul 20201.11%+0.18
30 Jun 20200.93%+0.10
15 Jun 20200.83%+0.01
29 May 20200.82%+0.20
15 May 20200.62%+0.03
30 Apr 20200.59%+0.09
15 Apr 20200.50%−0.27
31 Mar 20200.77%−0.05
13 Mar 20200.82%−0.22
28 Feb 20201.04%+0.02
14 Feb 20201.02%−0.01
31 Jan 20201.03%−0.48
15 Jan 20201.51%+0.51
31 Dec 20191.00%−0.63
13 Dec 20191.63%−0.34
29 Nov 20191.97%+0.70
15 Nov 20191.27%−1.40
31 Oct 20192.67%+0.21
15 Oct 20192.46%–

Newest first. Scroll inside the table for earlier dates, back to 15 Oct 2019.

Frequently asked questions

How shorted is Arbutus Biopharma Corporation right now?
9.34% of Arbutus Biopharma Corporation's (ABUS) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 769th 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 ABUS'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 ABUS's days to cover?
5.01 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.