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AtriCure, Inc. short interest

4.9M shares of AtriCure were sold short at the 15 October 2026 settlement, the most at any settlement since 29 Dec 2017, when our record starts. Short sellers would need 5.2 days of normal trading to buy them back.

Shares sold short4.9Mat 15 Oct 2026
Change on the settlement before+1.4%+139% over a year
Days to cover5.21at 938K shares a day
Of shares in issue9.61%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 at any settlement since 29 Dec 2017, when our record starts, and the share price moved +66% 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 20264.9M+1.4%938K5.21
    30 September 20264.8M+12.6%1.8M2.61
    15 September 20264.3M+3.3%1.2M3.62
    31 August 20264.1M+5.6%718K5.76
    14 August 20263.9M+1.5%643K6.10
    31 July 20263.9M-20.6%1.0M3.72
    15 July 20264.9M+9.3%857K5.68
    30 June 20264.4M+29.2%1.3M3.56
    15 June 20263.4M+1.3%707K4.87
    29 May 20263.4M-23.2%844K4.03
    15 May 20264.4M+14.8%980K4.52
    30 April 20263.9M+6.8%810K4.76
    15 April 20263.6M+2.1%639K5.65
    31 March 20263.5M+3.7%561K6.31
    13 March 20263.4M+8.5%609K5.60
    27 February 20263.1M-8.7%783K4.02
    13 February 20263.4M+37.3%923K3.74
    30 January 20262.5M+0.0%464K5.41
    15 January 20262.5M+6.1%591K4.25
    31 December 20252.4M-5.3%328K7.21
    15 December 20252.5M+8.7%622K4.02
    28 November 20252.3M-10.0%518K4.44
    14 November 20252.6M+10.9%554K4.61
    31 October 20252.3M+12.6%585K3.94
    15 October 20252.0M-7.3%362K5.65
    30 September 20252.2M+7.3%390K5.66
    15 September 20252.1M-1.3%479K4.29
    29 August 20252.1M+6.6%365K5.71
    15 August 20252.0M-12.1%564K3.46
    31 July 20252.2M+46.8%781K2.85
    15 July 20251.5M-2.0%359K4.23
    30 June 20251.5M-0.8%445K3.47
    13 June 20251.6M-14.7%492K3.17
    30 May 20251.8M+17.1%460K3.97
    15 May 20251.6M+2.1%752K2.08
    30 April 20251.5M+14.0%752K2.04
    15 April 20251.3M+0.2%478K2.81
    31 March 20251.3M-20.9%612K2.19
    14 March 20251.7M+19.1%656K2.59
    28 February 20251.4M+11.6%537K2.65
    14 February 20251.3M+8.9%548K2.33
    31 January 20251.2M-20.3%615K1.91
    15 January 20251.5M-9.3%639K2.30
    31 December 20241.6M+1.4%363K4.47
    13 December 20241.6M-5.5%369K4.33
    29 November 20241.7M+1.2%393K4.30
    15 November 20241.7M-25.6%595K2.81
    31 October 20242.2M-31.5%741K3.03
    15 October 20243.3M-8.5%410K8.01
    30 September 20243.6M+1.3%599K6.00
    13 September 20243.5M-1.0%583K6.08
    30 August 20243.6M-1.7%480K7.47
    15 August 20243.6M+17.2%817K4.46
    31 July 20243.1M-14.4%1.2M2.68
    15 July 20243.6M-1.6%837K4.34
    28 June 20243.7M+11.8%1.4M2.63
    14 June 20243.3M-6.4%540K6.11
    31 May 20243.5M+14.1%576K6.12
    15 May 20243.1M+3.7%971K3.19
    30 April 20243.0M-6.8%721K4.14
    15 April 20243.2M-1.4%750K4.27
    28 March 20243.2M+9.2%757K4.29
    15 March 20243.0M+25.3%789K3.77
    29 February 20242.4M+1.4%770K3.08
    15 February 20242.3M+5.5%575K4.07
    31 January 20242.2M+14.6%484K4.59
    12 January 20241.9M+12.3%528K3.66
    29 December 20231.7M-11.2%319K5.39
    15 December 20231.9M-1.2%648K2.99
    30 November 20232.0M+21.0%763K2.57
    15 November 20231.6M+18.1%542K2.99
    31 October 20231.4M+16.2%337K4.07
    13 October 20231.2M-4.8%301K3.93
    29 September 20231.2M-7.4%326K3.81
    15 September 20231.3M+9.0%311K4.31
    31 August 20231.2M+35.1%330K3.73
    15 August 2023911K+14.3%261K3.48
    31 July 2023797K-22.5%428K1.86
    14 July 20231.0M-9.7%263K3.91
    30 June 20231.1M-22.6%259K4.39
    15 June 20231.5M-15.9%226K6.52
    31 May 20231.8M+3.0%260K6.74
    15 May 20231.7M-3.1%356K4.77
    28 April 20231.8M+2.9%250K7.02
    14 April 20231.7M-0.4%265K6.44
    31 March 20231.7M+1.8%377K4.54
    15 March 20231.7M-6.5%335K5.02
    28 February 20231.8M+12.8%513K3.51
    15 February 20231.6M+35.5%332K4.81
    31 January 20231.2M-8.5%259K4.54
    13 January 20231.3M-10.9%284K4.54
    30 December 20221.4M+18.5%209K6.91
    15 December 20221.2M-5.2%253K4.82
    30 November 20221.3M-2.5%193K6.65
    15 November 20221.3M+9.2%412K3.20
    31 October 20221.2M-11.1%315K3.83
    14 October 20221.4M-15.4%291K4.67
    30 September 20221.6M-4.9%313K5.13
    15 September 20221.7M-12.0%245K6.89
    31 August 20221.9M+18.9%238K8.06
    15 August 20221.6M-3.9%209K7.70
    29 July 20221.7M-7.6%274K6.13
    15 July 20221.8M+1.6%216K8.43
    30 June 20221.8M-6.0%355K5.04
    15 June 20221.9M+11.1%252K7.54
    31 May 20221.7M-4.9%261K6.55
    13 May 20221.8M+6.9%391K4.60
    29 April 20221.7M+5.8%273K6.17
    14 April 20221.6M+2.8%183K8.68
    31 March 20221.5M-1.5%200K7.74
    15 March 20221.6M+5.2%248K6.33
    28 February 20221.5M+4.3%265K5.64
    15 February 20221.4M+5.9%242K5.91
    31 January 20221.4M-0.6%301K4.50
    14 January 20221.4M+14.6%294K4.63
    31 December 20211.2M+10.0%242K4.89
    15 December 20211.1M+4.0%328K3.29
    30 November 20211.0M+49.5%266K3.90
    15 November 2021694K-26.0%262K2.65
    29 October 2021937K-2.9%134K6.99
    15 October 2021965K-6.4%124K7.79
    30 September 20211.0M+10.9%206K5.00
    15 September 2021929K+2.1%176K5.27
    31 August 2021910K-1.0%220K4.14
    13 August 2021919K-33.2%344K2.67
    30 July 20211.4M-20.2%256K5.37
    15 July 20211.7M-10.0%197K8.75
    30 June 20211.9M-1.5%333K5.76
    15 June 20211.9M-5.5%273K7.11
    28 May 20212.1M+2.2%287K7.16
    14 May 20212.0M-4.1%299K6.74
    30 April 20212.1M+6.7%537K3.90
    15 April 20212.0M-8.9%246K7.99
    31 March 20212.2M+9.6%350K6.16
    15 March 20212.0M-24.0%354K5.55
    26 February 20212.6M+29.5%496K5.21
    12 February 20212.0M+1.3%280K7.12
    29 January 20212.0M-15.4%292K6.76
    15 January 20212.3M+2.9%296K7.86
    31 December 20202.3M-2.5%451K5.02
    15 December 20202.3M+3.9%314K7.40
    30 November 20202.2M+18.8%437K5.12
    13 November 20201.9M+6.0%434K4.33
    30 October 20201.8M-10.7%239K7.43
    15 October 20202.0M-10.9%342K5.82
    30 September 20202.2M+18.5%308K7.25
    15 September 20201.9M-9.1%207K9.09
    31 August 20202.1M+15.1%273K7.61
    14 August 20201.8M+17.3%276K6.53
    31 July 20201.5M+9.1%286K5.36
    15 July 20201.4M+7.6%273K5.15
    30 June 20201.3M+28.0%343K3.81
    15 June 20201.0M+4.5%347K2.94
    29 May 2020978K-9.9%328K2.98
    15 May 20201.1M+19.1%853K1.27
    30 April 2020911K-32.0%537K1.70
    15 April 20201.3M-13.1%392K3.42
    31 March 20201.5M+40.0%468K3.29
    13 March 20201.1M+35.1%267K4.12
    28 February 2020815K+0.3%446K1.83
    14 February 2020813K-4.0%330K2.46
    31 January 2020847K-3.1%386K2.19
    15 January 2020873K+11.7%274K3.19
    31 December 2019782K+1.2%153K5.11
    13 December 2019773K-1.9%165K4.68
    29 November 2019788K-8.1%133K5.90
    15 November 2019858K+4.3%201K4.28
    31 October 2019822K-37.5%229K3.60
    15 October 20191.3M+11.6%204K6.45
    30 September 20191.2M-6.3%254K4.64
    13 September 20191.3M+21.6%429K2.94
    30 August 20191.0M+6.5%215K4.82
    15 August 2019971K+0.5%312K3.11
    31 July 2019966K-9.9%180K5.35
    15 July 20191.1M-4.5%175K6.14
    28 June 20191.1M-20.4%250K4.49
    14 June 20191.4M-7.2%130K10.88
    31 May 20191.5M-9.4%132K11.50
    15 May 20191.7M+0.9%183K9.14
    30 April 20191.7M+4.9%354K4.70
    15 April 20191.6M-8.5%324K4.89
    29 March 20191.7M-9.8%259K6.68
    15 March 20191.9M+13.0%302K6.36
    28 February 20191.7M-3.1%164K10.37
    15 February 20191.8M+2.7%131K13.38
    31 January 20191.7M-4.3%191K8.95
    15 January 20191.8M-1.3%258K6.93
    31 December 20181.8M+8.7%273K6.62
    14 December 20181.7M+0.8%165K10.09
    30 November 20181.6M-0.0%207K7.96
    15 November 20181.6M+3.4%217K7.61
    31 October 20181.6M+7.2%285K5.60
    15 October 20181.5M-26.7%470K3.17
    28 September 20182.0M+1.5%246K8.25
    14 September 20182.0M-4.5%118K17.00
    31 August 20182.1M+1.8%152K13.74
    15 August 20182.1M-0.8%186K11.08
    31 July 20182.1M+2.8%136K15.26
    13 July 20182.0M-1.5%123K16.37
    29 June 20182.0M+18.0%306K6.71
    15 June 20181.7M-0.4%179K9.69
    31 May 20181.7M-18.3%123K14.12
    15 May 20182.1M-2.9%141K15.11
    30 April 20182.2M-0.9%161K13.66
    13 April 20182.2M-2.9%278K7.97
    29 March 20182.3M+4.6%180K12.74
    15 March 20182.2M+6.3%238K9.17
    28 February 20182.1M+0.0%297K6.91
    15 February 20182.1M-2.5%239K8.62
    31 January 20182.1M+4.2%153K13.82
    12 January 20182.0M+3.0%217K9.33
    29 December 20172.0M157K12.54
    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.