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Arbutus Biopharma Corp. short interest

24.6M shares of Arbutus Biopharma were sold short at the 15 October 2026 settlement, near the middle of its range over the last year (9.9M to 34.1M). Short sellers would need 4.3 days of normal trading to buy them back.

Shares sold short24.6Mat 15 Oct 2026
Change on the settlement before-27.9%+149% over a year
Days to cover4.34at 5.7M shares a day
Of shares in issue12.43%shares short over shares outstanding
New to this? How to read this page
  1. Short interest is the number of shares investors have borrowed and sold, betting the price will fall, and not yet bought back.
  2. Days to cover is shares short over an average day's trading: how many days it would take short sellers to buy them all back. Above 5 or so is high.
  3. Rising short interest says more investors are betting against the stock. A crowded short can also rise fast if shorts rush to buy back.
  4. Brokers report it twice a month to FINRA, about ten days after each settlement date.
  5. What is short interest?

Short interest, days to cover and the price

Short interest is near the middle of its range over the last year (9.9M to 34.1M), and the share price moved -4% over the last year.

Shares sold shortDays to coverShare price

Three charts on one timeline. Top: shares sold short at each settlement. Middle: days to cover, taller meaning shorts would need longer to buy back. Bottom: the share price, so you can see whether shorts added as the price fell or rose.

How it compares

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    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 202624.6M-27.9%5.7M4.34
    30 September 202634.1M+84.2%9.7M3.53
    15 September 202618.5M-2.3%3.7M5.01
    31 August 202618.9M+2.5%6.1M3.08
    14 August 202618.5M-8.8%1.2M15.10
    31 July 202620.2M+3.0%1.5M13.69
    15 July 202619.7M+14.9%2.7M7.40
    30 June 202617.1M-2.3%3.5M4.89
    15 June 202617.5M+3.2%1.3M13.96
    29 May 202617.0M+3.3%1.8M9.18
    15 May 202616.4M-7.4%962K17.08
    30 April 202617.7M-0.3%2.5M7.17
    15 April 202617.8M+10.1%1.6M11.44
    31 March 202616.2M-1.4%2.3M7.04
    13 March 202616.4M+11.2%3.9M4.18
    27 February 202614.8M-1.6%1.6M9.52
    13 February 202615.0M+10.6%2.3M6.43
    30 January 202613.6M+3.8%1.8M7.47
    15 January 202613.1M+4.2%1.1M12.17
    31 December 202512.5M+16.7%1.5M8.63
    15 December 202510.7M-4.2%1.2M9.28
    28 November 202511.2M+6.1%1.1M9.87
    14 November 202510.6M+6.5%984K10.74
    31 October 20259.9M+0.5%958K10.35
    15 October 20259.9M-2.7%937K10.52
    30 September 202510.1M-9.2%1.1M9.56
    15 September 202511.2M+5.8%2.2M5.18
    29 August 202510.5M-15.7%948K11.12
    15 August 202512.5M-3.6%687K18.22
    31 July 202513.0M-4.8%637K20.38
    15 July 202513.6M-1.0%731K18.65
    30 June 202513.8M+7.2%1.1M12.56
    13 June 202512.8M+0.7%516K24.88
    30 May 202512.8M+10.8%799K15.97
    15 May 202511.5M+2.8%860K13.37
    30 April 202511.2M+1.2%791K14.15
    15 April 202511.1M+12.2%1.5M7.59
    31 March 20259.8M+2.9%961K10.25
    14 March 20259.6M+13.8%1.0M9.41
    28 February 20258.4M+16.6%1.2M7.07
    14 February 20257.2M+7.3%624K11.55
    31 January 20256.7M+1.3%577K11.64
    15 January 20256.6M+11.6%834K7.96
    31 December 20245.9M-0.4%993K5.99
    13 December 20246.0M+2.6%694K8.60
    29 November 20245.8M-3.9%878K6.63
    15 November 20246.1M-7.5%969K6.25
    31 October 20246.5M-16.0%896K7.30
    15 October 20247.8M+5.9%710K10.97
    30 September 20247.4M+12.2%1.7M4.44
    13 September 20246.6M+8.2%1.7M3.85
    30 August 20246.1M-8.7%837K7.24
    15 August 20246.6M-2.3%826K8.04
    31 July 20246.8M-3.1%869K7.82
    15 July 20247.0M+16.9%947K7.41
    28 June 20246.0M+11.8%1.3M4.61
    14 June 20245.4M+6.9%1.1M4.86
    31 May 20245.0M-5.8%1.1M4.66
    15 May 20245.3M-8.1%614K8.69
    30 April 20245.8M+12.3%705K8.24
    15 April 20245.2M+13.7%3.2M1.63
    28 March 20244.5M+10.1%516K8.81
    15 March 20244.1M+1.6%691K5.98
    29 February 20244.1M+10.1%939K4.33
    15 February 20243.7M-39.7%2.0M1.88
    31 January 20246.1M-4.8%781K7.84
    12 January 20246.4M+3.4%702K9.16
    29 December 20236.2M+0.4%688K9.03
    15 December 20236.2M+0.2%630K9.83
    30 November 20236.2M-8.2%887K6.97
    15 November 20236.7M+6.7%704K9.56
    31 October 20236.3M+9.3%423K14.93
    13 October 20235.8M-16.1%634K9.11
    29 September 20236.9M+18.6%713K9.65
    15 September 20235.8M+12.1%716K8.11
    31 August 20235.2M+0.6%632K8.19
    15 August 20235.1M+5.2%608K8.46
    31 July 20234.9M+0.7%437K11.20
    14 July 20234.9M-0.7%367K13.21
    30 June 20234.9M+12.8%1.1M4.53
    15 June 20234.3M+2.0%482K8.99
    31 May 20234.3M-1.0%505K8.42
    15 May 20234.3M+8.3%606K7.09
    28 April 20234.0M-7.0%797K4.97
    14 April 20234.3M-13.9%1.2M3.55
    31 March 20234.9M+5.5%824K6.00
    15 March 20234.7M+15.8%1.2M4.05
    28 February 20234.1M+1.5%1.2M3.28
    15 February 20234.0M-7.4%614K6.50
    31 January 20234.3M-8.5%590K7.31
    13 January 20234.7M-0.6%1.1M4.41
    30 December 20224.7M+23.0%1.2M3.89
    15 December 20223.9M-4.0%852K4.53
    30 November 20224.0M+7.4%1.0M3.97
    15 November 20223.7M-10.3%1.3M2.95
    31 October 20224.2M-0.8%615K6.78
    14 October 20224.2M+2.1%964K4.36
    30 September 20224.1M+7.5%716K5.74
    15 September 20223.8M-2.5%749K5.11
    31 August 20223.9M-11.1%590K6.65
    15 August 20224.4M-7.4%1.0M4.20
    29 July 20224.8M-7.3%727K6.56
    15 July 20225.1M-2.4%761K6.75
    30 June 20225.3M+7.0%1.2M4.44
    15 June 20224.9M-7.8%881K5.59
    31 May 20225.3M+6.5%1.0M5.12
    13 May 20225.0M-5.8%1.6M3.21
    29 April 20225.3M-8.3%1.2M4.60
    14 April 20225.8M-12.8%1.3M4.33
    31 March 20226.7M+0.3%1.7M3.84
    15 March 20226.6M-8.7%2.2M2.97
    28 February 20227.3M+2.9%2.9M2.54
    15 February 20227.1M+4.1%2.9M2.46
    31 January 20226.8M+72.9%3.5M1.93
    14 January 20223.9M-13.9%2.6M1.53
    31 December 20214.5M-43.6%4.3M1.05
    15 December 20218.1M+253.9%44.6M1.00
    30 November 20212.3M-4.2%1.2M1.92
    15 November 20212.4M-15.1%1.7M1.41
    29 October 20212.8M+1.0%1.5M1.91
    15 October 20212.8M-0.2%3.1M1.00
    30 September 20212.8M-24.8%2.7M1.03
    15 September 20213.7M-6.1%4.7M1.00
    31 August 20213.9M-5.2%1.6M2.54
    13 August 20214.2M-26.1%1.4M3.03
    30 July 20215.6M+15.0%1.2M4.58
    15 July 20214.9M-9.6%1.3M3.80
    30 June 20215.4M+51.0%3.1M1.74
    15 June 20213.6M-14.4%1.6M2.25
    28 May 20214.2M-9.2%808K5.18
    14 May 20214.6M+19.4%1.6M2.90
    30 April 20213.9M-8.6%1.1M3.39
    15 April 20214.2M+2.1%1.0M4.21
    31 March 20214.1M+6.2%1.4M2.98
    15 March 20213.9M+19.1%2.0M1.93
    26 February 20213.3M+28.5%2.4M1.34
    12 February 20212.5M-20.1%4.2M1.00
    29 January 20213.2M-21.4%2.3M1.39
    15 January 20214.1M-15.9%2.8M1.46
    31 December 20204.8M+63.5%4.3M1.13
    15 December 20202.9M+37.8%4.4M1.00
    30 November 20202.1M-2.2%2.4M1.00
    13 November 20202.2M-17.7%1.5M1.46
    30 October 20202.7M+32.2%826K3.21
    15 October 20202.0M-36.3%1.1M1.87
    30 September 20203.2M+4.6%1.7M1.86
    15 September 20203.0M+15.0%1.4M2.20
    31 August 20202.6M-0.6%2.0M1.32
    14 August 20202.6M+34.1%6.9M1.00
    31 July 20202.0M+156.8%35.9M1.00
    15 July 2020765K+19.3%552K1.39
    30 June 2020641K+11.8%995K1.00
    15 June 2020573K+1.4%1.1M1.00
    29 May 2020565K+31.5%2.6M1.00
    15 May 2020430K+4.9%1.0M1.00
    30 April 2020410K+18.8%415K1.00
    15 April 2020345K-34.6%557K1.00
    31 March 2020528K-6.6%1.3M1.00
    13 March 2020565K-4.8%306K1.85
    28 February 2020593K+1.9%883K1.00
    14 February 2020582K-1.0%917K1.00
    31 January 2020588K-31.5%322K1.82
    15 January 2020858K+50.3%618K1.39
    31 December 2019571K-38.3%803K1.00
    13 December 2019925K-17.6%763K1.21
    29 November 20191.1M+55.4%265K4.24
    15 November 2019722K-52.4%601K1.20
    31 October 20191.5M+8.5%1.1M1.39
    15 October 20191.4M+75.3%626K2.23
    30 September 2019798K+0.7%161K4.96
    13 September 2019793K-37.6%175K4.54
    30 August 20191.3M-6.8%160K7.93
    15 August 20191.4M+4.1%188K7.25
    31 July 20191.3M+11.2%254K5.16
    15 July 20191.2M-39.1%317K3.71
    28 June 20191.9M+35.9%1.5M1.30
    14 June 20191.4M+11.0%378K3.76
    31 May 20191.3M+16.6%232K5.52
    15 May 20191.1M+10.4%318K3.46
    30 April 2019995K-0.3%666K1.49
    15 April 2019998K-8.4%286K3.50
    29 March 20191.1M+19.9%112K9.74
    15 March 2019909K-5.0%204K4.45
    28 February 2019957K+3.0%169K5.67
    15 February 2019929K-3.4%99K9.41
    31 January 2019962K+1.9%215K4.48
    15 January 2019943K-20.6%284K3.33
    31 December 20181.2M+6.1%217K5.47
    14 December 20181.1M-4.3%163K6.89
    30 November 20181.2M-17.2%202K5.80
    15 November 20181.4M-2.2%290K4.88
    31 October 20181.4M-19.5%416K3.47
    15 October 20181.8M+11.9%983K1.83
    28 September 20181.6M-3.4%214K7.51
    14 September 20181.7M-1.4%523K3.17
    31 August 20181.7M-31.2%181K9.29
    15 August 20182.4M+1.5%533K4.58
    31 July 20182.4M-14.0%448K5.38
    13 July 20182.8M-3.1%981K2.86
    29 June 20182.9M+281.0%716K4.04
    15 June 2018759K+19.3%227K3.35
    31 May 2018636K-6.2%106K5.99
    15 May 2018678K-2.0%174K3.89
    30 April 2018692K-2.8%153K4.53
    13 April 2018713K+11.6%157K4.54
    29 March 2018639K-4.0%263K2.43
    15 March 2018665K-17.0%140K4.75
    28 February 2018801K-6.6%106K7.58
    15 February 2018857K+10.7%233K3.68
    31 January 2018774K+9.9%146K5.31
    12 January 2018705K-7.7%206K3.41
    29 December 2017764K183K4.17
    Shares in millions (M) or thousands (K); hold the pointer on a figure for the exact count. FINRA publishes consolidated short interest twice a month, about ten days after each settlement.