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Xenon Pharmaceuticals Inc. short interest

7.3M shares of Xenon Pharmaceuticals were sold short at the 15 October 2026 settlement, the most since 30 Sep 2025. Short sellers would need 4.0 days of normal trading to buy them back.

Shares sold short7.3Mat 15 Oct 2026
Change on the settlement before+21.6%+20% over a year
Days to cover3.95at 1.9M shares a day
Of shares in issue7.60%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 the most since 30 Sep 2025, and the share price moved -14% 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

every company on the site

    The bar ranks every company on the site from the lowest on the left to the highest on the right, in three equal thirds; the small figures under it are the values where each third starts, and the black tick is the middle company. The orange dot is this company; the grey ticks are the other companies in its industry (hover or tap for names). A hatched block is companies tied at none.

    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20267.3M+21.6%1.9M3.95
    30 September 20266.0M-6.3%3.8M1.58
    15 September 20266.4M+1.6%527K12.22
    31 August 20266.3M+11.9%698K9.09
    14 August 20265.7M+5.3%619K9.16
    31 July 20265.4M-15.0%735K7.33
    15 July 20266.3M+1.3%1.8M3.56
    30 June 20266.3M+42.0%2.1M2.96
    15 June 20264.4M+9.0%1.4M3.20
    29 May 20264.0M+5.5%1.4M2.94
    15 May 20263.8M-7.6%948K4.04
    30 April 20264.1M-14.5%899K4.62
    15 April 20264.9M+0.1%902K5.38
    31 March 20264.9M-11.0%1.4M3.54
    13 March 20265.5M-1.5%3.2M1.70
    27 February 20265.5M+2.8%817K6.77
    13 February 20265.4M-2.9%729K7.38
    30 January 20265.5M+3.2%844K6.57
    15 January 20265.4M-9.4%1.2M4.36
    31 December 20255.9M+3.6%720K8.23
    15 December 20255.7M-2.9%803K7.12
    28 November 20255.9M-2.6%800K7.36
    14 November 20256.0M+4.5%820K7.37
    31 October 20255.8M-5.9%792K7.30
    15 October 20256.1M-20.2%760K8.10
    30 September 20257.7M+9.4%800K9.64
    15 September 20257.0M+1.9%630K11.18
    29 August 20256.9M+0.2%676K10.22
    15 August 20256.9M-1.2%1.2M5.71
    31 July 20257.0M+7.2%821K8.49
    15 July 20256.5M-11.9%898K7.24
    30 June 20257.4M+100.1%2.1M3.53
    13 June 20253.7M+9.6%775K4.77
    30 May 20253.4M-3.0%1.2M2.76
    15 May 20253.5M-3.2%1.6M2.12
    30 April 20253.6M-9.7%725K4.95
    15 April 20254.0M+0.6%1.2M3.45
    31 March 20253.9M+8.4%410K9.62
    14 March 20253.6M-3.2%512K7.11
    28 February 20253.8M-4.1%534K7.05
    14 February 20253.9M+11.3%375K10.46
    31 January 20253.5M-1.9%436K8.09
    15 January 20253.6M+3.1%401K8.96
    31 December 20243.5M+20.5%414K8.41
    13 December 20242.9M+0.4%350K8.25
    29 November 20242.9M-2.1%437K6.58
    15 November 20242.9M+1.8%389K7.56
    31 October 20242.9M-8.7%375K7.71
    15 October 20243.2M-4.2%355K8.90
    30 September 20243.3M-8.2%289K11.40
    13 September 20243.6M+0.7%337K10.67
    30 August 20243.6M+6.9%277K12.89
    15 August 20243.3M+7.6%383K8.72
    31 July 20243.1M-5.1%395K7.85
    15 July 20243.3M+7.1%532K6.15
    28 June 20243.1M-0.3%552K5.53
    14 June 20243.1M+2.2%328K9.34
    31 May 20243.0M+6.3%402K7.44
    15 May 20242.8M+1.2%269K10.48
    30 April 20242.8M+6.4%389K7.17
    15 April 20242.6M-5.0%288K9.10
    28 March 20242.8M+5.1%322K8.55
    15 March 20242.6M-3.0%378K6.93
    29 February 20242.7M+7.0%444K6.08
    15 February 20242.5M-10.1%378K6.68
    31 January 20242.8M+12.0%390K7.20
    12 January 20242.5M+12.9%636K3.94
    29 December 20232.2M-5.9%673K3.30
    15 December 20232.4M+20.2%640K3.69
    30 November 20232.0M+14.8%1.0M1.91
    15 November 20231.7M-2.8%745K2.30
    31 October 20231.8M-10.1%444K3.97
    13 October 20232.0M-26.3%362K5.41
    29 September 20232.7M-4.0%521K5.09
    15 September 20232.8M-0.5%293K9.45
    31 August 20232.8M+2.3%346K8.03
    15 August 20232.7M+2.7%396K6.86
    31 July 20232.6M-4.4%296K8.94
    14 July 20232.8M-11.0%214K12.91
    30 June 20233.1M-2.7%320K9.72
    15 June 20233.2M+9.4%435K7.34
    31 May 20232.9M-3.7%282K10.36
    15 May 20233.0M-12.1%458K6.62
    28 April 20233.5M-1.2%396K8.73
    14 April 20233.5M-11.3%346K10.09
    31 March 20233.9M+7.6%419K9.40
    15 March 20233.7M+16.1%492K7.45
    28 February 20233.2M+3.0%321K9.84
    15 February 20233.1M+1.0%381K8.04
    31 January 20233.0M-16.4%285K10.63
    13 January 20233.6M+1.2%516K7.03
    30 December 20223.6M-6.2%317K11.30
    15 December 20223.8M+2.3%393K9.73
    30 November 20223.7M+1.4%333K11.20
    15 November 20223.7M+4.7%474K7.76
    31 October 20223.5M+9.0%259K13.58
    14 October 20223.2M+16.1%356K9.05
    30 September 20222.8M+7.1%339K8.20
    15 September 20222.6M+9.8%417K6.21
    31 August 20222.4M+28.2%428K5.52
    15 August 20221.8M-17.4%556K3.31
    29 July 20222.2M-6.0%283K7.87
    15 July 20222.4M+6.6%427K5.55
    30 June 20222.2M-7.8%982K2.27
    15 June 20222.4M-2.0%388K6.22
    31 May 20222.5M-6.1%472K5.21
    13 May 20222.6M+30.3%604K4.34
    29 April 20222.0M-6.3%319K6.31
    14 April 20222.1M-0.8%552K3.89
    31 March 20222.2M-4.5%503K4.31
    15 March 20222.3M+0.4%331K6.86
    28 February 20222.3M+3.3%388K5.82
    15 February 20222.2M+4.9%336K6.50
    31 January 20222.1M+12.2%581K3.59
    14 January 20221.9M+4.9%509K3.65
    31 December 20211.8M-16.6%276K6.42
    15 December 20212.1M+26.1%514K4.13
    30 November 20211.7M-7.0%608K2.77
    15 November 20211.8M+6.2%519K3.49
    29 October 20211.7M-13.9%701K2.43
    15 October 20212.0M+121.6%10.3M1.00
    30 September 2021893K+52.4%369K2.42
    15 September 2021586K+10.5%184K3.19
    31 August 2021531K-20.4%146K3.64
    13 August 2021666K-6.9%253K2.63
    30 July 2021716K-0.3%128K5.59
    15 July 2021718K+12.1%147K4.87
    30 June 2021640K+0.7%315K2.03
    15 June 2021636K-3.2%161K3.96
    28 May 2021657K-13.5%152K4.33
    14 May 2021760K-3.4%94K8.05
    30 April 2021787K+0.5%187K4.21
    15 April 2021783K+5.9%74K10.60
    31 March 2021740K-13.8%137K5.42
    15 March 2021858K-9.1%335K2.56
    26 February 2021944K-3.4%189K5.01
    12 February 2021977K-5.2%99K9.90
    29 January 20211.0M-3.5%174K5.93
    15 January 20211.1M-6.1%79K13.44
    31 December 20201.1M+36.3%224K5.09
    15 December 2020836K+0.7%119K7.05
    30 November 2020829K+2.9%113K7.34
    13 November 2020806K+11.9%139K5.79
    30 October 2020721K-45.2%89K8.13
    15 October 20201.3M-3.8%83K15.91
    30 September 20201.4M-1.4%63K21.71
    15 September 20201.4M-0.1%77K18.00
    31 August 20201.4M+14.6%128K10.83
    14 August 20201.2M+7.2%98K12.38
    31 July 20201.1M+9.3%95K11.91
    15 July 20201.0M+12.5%84K12.36
    30 June 2020918K+16.7%177K5.19
    15 June 2020786K+5.8%334K2.35
    29 May 2020743K-0.1%147K5.04
    15 May 2020744K+2.7%103K7.24
    30 April 2020724K+8.5%183K3.96
    15 April 2020667K+18.6%281K2.38
    31 March 2020563K-4.8%299K1.88
    13 March 2020591K+29.8%262K2.26
    28 February 2020455K+9.7%209K2.18
    14 February 2020415K+1.1%257K1.62
    31 January 2020411K+4.2%278K1.48
    15 January 2020394K-8.3%420K1.00
    31 December 2019430K-24.4%120K3.57
    13 December 2019568K-25.3%350K1.62
    29 November 2019761K+32.5%132K5.78
    15 November 2019574K+8.7%43K13.24
    31 October 2019528K+8.0%36K14.77
    15 October 2019489K+75.8%86K5.69
    30 September 2019278K-16.0%45K6.11
    13 September 2019331K-5.1%30K11.04
    30 August 2019349K-2.5%43K8.09
    15 August 2019358K-14.8%50K7.18
    31 July 2019420K-14.7%36K11.75
    15 July 2019492K-0.1%50K9.78
    28 June 2019493K-7.3%70K7.08
    14 June 2019531K-0.4%157K3.39
    31 May 2019534K+5.1%57K9.32
    15 May 2019508K-2.2%87K5.86
    30 April 2019519K+16.1%90K5.78
    15 April 2019447K+10.6%96K4.65
    29 March 2019404K+0.3%113K3.58
    15 March 2019403K+63.7%121K3.33
    28 February 2019246K+25.9%121K2.03
    15 February 2019195K+23.0%56K3.47
    31 January 2019159K+0.5%70K2.27
    15 January 2019158K-24.4%140K1.13
    31 December 2018209K-48.6%335K1.00
    14 December 2018407K+12.3%122K3.32
    30 November 2018362K+37.5%134K2.70
    15 November 2018263K-11.2%165K1.60
    31 October 2018297K+1.6%100K2.97
    15 October 2018292K+4.7%218K1.34
    28 September 2018279K+16.1%145K1.92
    14 September 2018240K+9.7%514K1.00
    31 August 2018219K-12.8%197K1.11
    15 August 2018251K+37.0%153K1.64
    31 July 2018183K+14.5%109K1.68
    13 July 2018160K-66.2%366K1.00
    29 June 2018473K+25.3%515K1.00
    15 June 2018377K+32.0%271K1.39
    31 May 2018286K+115.5%153K1.87
    15 May 2018133K-10.4%184K1.00
    30 April 2018148K+5.7%155K1.00
    13 April 2018140K-6.8%95K1.47
    29 March 2018150K-6.9%80K1.88
    15 March 2018161K-13.5%111K1.46
    28 February 2018186K-3.7%35K5.30
    15 February 2018193K+11.8%70K2.77
    31 January 2018173K+21.0%47K3.67
    12 January 2018143K+2.0%34K4.22
    29 December 2017140K126K1.11
    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.