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Atrium Therapeutics, Inc. short interest

3.7M shares of Atrium Therapeutics were sold short at the 15 October 2026 settlement, the most since 15 May 2026. Short sellers would need 12.9 days of normal trading to buy them back.

Shares sold short3.7Mat 15 Oct 2026
Change on the settlement before+9.7%-81% over a year
Days to cover12.94at 288K shares a day
Of shares in issue21.78%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 15 May 2026.

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 15 Jun 2020 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20263.7M+9.7%288K12.94
    30 September 20263.4M-0.1%411K8.27
    15 September 20263.4M+1.4%417K8.15
    31 August 20263.4M-3.7%169K19.79
    14 August 20263.5M-0.9%127K27.46
    31 July 20263.5M-2.1%124K28.39
    15 July 20263.6M-1.8%203K17.71
    30 June 20263.7M+1.3%292K12.52
    15 June 20263.6M-1.2%178K20.31
    29 May 20263.7M-2.1%231K15.83
    15 May 20263.7M+8.9%176K21.18
    30 April 20263.4M+13.6%393K8.71
    15 April 20263.0M+57.6%502K6.00
    31 March 20261.9M+61.5%659K2.90
    13 March 20261.2M+173.7%1.4M1.00
    27 February 2026433K-95.7%732K1.00
    13 February 202610.2M+16.1%2.9M3.56
    30 January 20268.7M+4.0%1.4M6.35
    15 January 20268.4M-4.4%2.0M4.20
    31 December 20258.8M-9.7%1.9M4.61
    15 December 20259.7M+9.9%2.4M4.12
    28 November 20258.9M-14.1%2.7M3.31
    14 November 202510.3M-1.7%5.1M2.03
    31 October 202510.5M-47.6%12.9M1.00
    15 October 202520.0M-3.5%1.5M13.50
    30 September 202520.8M-6.7%2.8M7.32
    15 September 202522.2M+26.6%5.3M4.21
    29 August 202517.6M+12.1%2.0M8.96
    15 August 202515.7M-3.3%4.5M3.47
    31 July 202516.2M-0.3%2.9M5.67
    15 July 202516.3M-2.8%2.4M6.86
    30 June 202516.7M+2.3%1.1M14.64
    13 June 202516.3M+1.0%1.8M9.20
    30 May 202516.2M+2.5%1.1M14.90
    15 May 202515.8M+1.3%1.6M10.07
    30 April 202515.6M+0.6%1.2M13.28
    15 April 202515.5M-11.9%2.1M7.31
    31 March 202517.6M+9.0%1.5M11.47
    14 March 202516.1M-4.9%1.3M12.57
    28 February 202517.0M+2.9%1.3M13.41
    14 February 202516.5M+10.2%1.4M11.38
    31 January 202514.9M-2.9%1.2M12.00
    15 January 202515.4M-1.9%1.4M11.30
    31 December 202415.7M+1.3%1.4M11.07
    13 December 202415.5M+3.6%1.3M12.15
    29 November 202414.9M+2.9%908K16.44
    15 November 202414.5M-1.0%1.4M10.39
    31 October 202414.7M-1.5%735K19.95
    15 October 202414.9M+0.7%875K17.00
    30 September 202414.8M+23.3%2.4M6.18
    13 September 202412.0M+10.8%977K12.26
    30 August 202410.8M-16.3%1.3M8.18
    15 August 202412.9M-0.3%1.4M9.48
    31 July 202413.0M+0.4%1.1M11.90
    15 July 202412.9M+19.1%1.3M9.89
    28 June 202410.8M-3.8%2.5M4.27
    14 June 202411.3M+4.1%2.4M4.63
    31 May 202410.8M-4.3%999K10.83
    15 May 202411.3M-0.7%1.0M11.24
    30 April 202411.4M+6.8%887K12.84
    15 April 202410.7M+6.8%1.0M10.62
    28 March 202410.0M+15.8%1.3M7.85
    15 March 20248.6M+10.9%1.8M4.75
    29 February 20247.8M+0.5%1.1M7.09
    15 February 20247.7M+1.2%797K9.70
    31 January 20247.6M+4.2%1.0M7.42
    12 January 20247.3M-25.3%1.3M5.65
    29 December 20239.8M-8.0%964K10.19
    15 December 202310.7M-3.1%1.4M7.52
    30 November 202311.0M+1.5%3.2M3.40
    15 November 202310.9M-6.4%660K16.46
    31 October 202311.6M+0.3%649K17.89
    13 October 202311.6M-25.3%825K14.02
    29 September 202315.5M-7.4%762K20.31
    15 September 202316.7M+2.1%1.3M12.57
    31 August 202316.4M+2.0%584K28.07
    15 August 202316.1M+2.8%653K24.60
    31 July 202315.6M-2.7%653K23.93
    14 July 202316.1M+2.2%493K32.55
    30 June 202315.7M+11.4%1.7M8.99
    15 June 202314.1M+5.2%1.2M11.43
    31 May 202313.4M+4.4%921K14.55
    15 May 202312.8M+29.3%1.5M8.54
    28 April 20239.9M-12.4%1.6M6.32
    14 April 202311.3M+3.9%1.4M8.02
    31 March 202310.9M+25.6%1.7M6.52
    15 March 20238.7M+4.6%957K9.08
    28 February 20238.3M+5.4%837K9.93
    15 February 20237.9M+5.1%699K11.27
    31 January 20237.5M-4.8%695K10.78
    13 January 20237.9M-4.9%918K8.58
    30 December 20228.3M+27.2%2.8M2.93
    15 December 20226.5M-7.2%5.9M1.10
    30 November 20227.0M-0.2%667K10.52
    15 November 20227.0M+26.6%436K16.14
    31 October 20225.6M+12.7%681K8.16
    14 October 20224.9M+7.5%370K13.31
    30 September 20224.6M-13.4%796K5.76
    15 September 20225.3M+0.6%337K15.71
    31 August 20225.3M-5.5%254K20.73
    15 August 20225.6M-4.5%337K16.52
    29 July 20225.8M-1.2%232K25.17
    15 July 20225.9M+4.0%242K24.39
    30 June 20225.7M+15.1%785K7.23
    15 June 20224.9M+4.8%262K18.81
    31 May 20224.7M+9.4%351K13.40
    13 May 20224.3M+4.6%282K15.21
    29 April 20224.1M+2.8%191K21.48
    14 April 20224.0M-0.3%210K19.04
    31 March 20224.0M+1.2%210K19.10
    15 March 20224.0M+2.1%204K19.41
    28 February 20223.9M+1.9%476K8.14
    15 February 20223.8M+5.1%238K15.95
    31 January 20223.6M-4.0%300K12.07
    14 January 20223.8M-4.6%226K16.69
    31 December 20214.0M-7.1%225K17.59
    15 December 20214.3M-9.4%308K13.82
    30 November 20214.7M-3.4%305K15.40
    15 November 20214.9M-8.6%165K29.49
    29 October 20215.3M+1.4%140K37.91
    15 October 20215.2M-7.0%190K27.64
    30 September 20215.6M+3.8%409K13.79
    15 September 20215.4M-16.6%774K7.02
    31 August 20216.5M+3.6%250K26.11
    13 August 20216.3M+3.7%467K13.46
    30 July 20216.1M+0.0%193K31.34
    15 July 20216.1M-1.1%173K35.09
    30 June 20216.1M-4.3%345K17.76
    15 June 20216.4M-2.4%185K34.59
    28 May 20216.6M-0.4%130K50.34
    14 May 20216.6M+1.2%216K30.57
    30 April 20216.5M+2.3%190K34.36
    15 April 20216.4M+9.5%302K21.10
    31 March 20215.8M+30.5%504K11.52
    15 March 20214.5M+22.1%366K12.16
    26 February 20213.6M+14.2%516K7.06
    12 February 20213.2M+8.5%212K15.03
    29 January 20212.9M-7.3%254K11.57
    15 January 20213.2M+10.3%167K19.02
    31 December 20202.9M+61.7%338K8.51
    15 December 20201.8M+4.0%121K14.73
    30 November 20201.7M+3.7%76K22.59
    13 November 20201.6M+3.9%118K13.93
    30 October 20201.6M+10.9%143K11.13
    15 October 20201.4M-6.9%103K13.84
    30 September 20201.5M+64.1%452K3.40
    15 September 2020937K+10.8%168K5.57
    31 August 2020846K+30.6%126K6.73
    14 August 2020647K+6.6%139K4.67
    31 July 2020607K+5.5%100K6.06
    15 July 2020576K-12.0%208K2.77
    30 June 2020654K+477178.8%242K2.70
    15 June 2020137525K1.00
    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.