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Axcelis Technologies Inc. short interest

1.4M shares of Axcelis Technologies were sold short at the 15 October 2026 settlement, near the bottom of its range over the last year (1.4M to 5.0M). Short sellers would need 4.7 days of normal trading to buy them back.

Shares sold short1.4Mat 15 Oct 2026
Change on the settlement before+0.7%-68% over a year
Days to cover4.73at 307K shares a day
Of shares in issue4.70%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 bottom of its range over the last year (1.4M to 5.0M), and the share price moved +36% 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. Counts before a split are restated to today's shares, the way the price is.

How it compares

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    Every settlement since 29 Dec 2017 as a table
    SettlementShares shortChangeAverage daily volumeDays to cover
    15 October 20261.4M+0.7%307K4.73
    30 September 20261.4M+0.3%378K3.80
    15 September 20261.4M-11.7%320K4.48
    31 August 20261.6M-3.4%308K5.28
    14 August 20261.7M+4.3%407K4.14
    31 July 20261.6M-8.9%406K3.97
    15 July 20261.8M-6.8%564K3.14
    30 June 20261.9M-0.8%717K2.65
    15 June 20261.9M-24.9%648K2.96
    29 May 20262.5M-3.2%473K5.38
    15 May 20262.6M-12.0%808K3.26
    30 April 20263.0M-14.6%791K3.78
    15 April 20263.5M-7.8%575K6.09
    31 March 20263.8M+2.5%761K4.99
    13 March 20263.7M+0.1%727K5.09
    27 February 20263.7M-25.9%1.5M2.54
    13 February 20265.0M+5.0%774K6.44
    30 January 20264.8M+2.4%503K9.45
    15 January 20264.6M+15.7%606K7.66
    31 December 20254.0M-4.8%372K10.77
    15 December 20254.2M+3.5%581K7.26
    28 November 20254.1M+6.7%469K8.68
    14 November 20253.8M-12.9%773K4.94
    31 October 20254.4M-2.1%512K8.56
    15 October 20254.5M+12.9%1.0M4.30
    30 September 20254.0M-15.2%559K7.08
    15 September 20254.7M+2.2%412K11.32
    29 August 20254.6M-0.3%408K11.20
    15 August 20254.6M-13.3%694K6.60
    31 July 20255.3M-1.4%459K11.52
    15 July 20255.4M-0.9%390K13.75
    30 June 20255.4M+2.0%583K9.27
    13 June 20255.3M-2.6%750K7.07
    30 May 20255.4M+4.3%424K12.84
    15 May 20255.2M-7.0%791K6.60
    30 April 20255.6M+5.7%519K10.82
    15 April 20255.3M+13.3%918K5.79
    31 March 20254.7M-0.3%600K7.80
    14 March 20254.7M+5.0%707K6.65
    28 February 20254.5M-5.7%641K6.98
    14 February 20254.7M+1.3%988K4.81
    31 January 20254.7M+3.4%472K9.93
    15 January 20254.5M+2.0%513K8.82
    31 December 20244.4M+1.0%667K6.66
    13 December 20244.4M+0.5%475K9.26
    29 November 20244.4M-1.1%689K6.35
    15 November 20244.4M+2.7%777K5.69
    31 October 20244.3M+140.4%576K7.47
    15 October 20241.8M-14.6%542K3.31
    30 September 20242.1M-4.3%798K2.63
    13 September 20242.2M+8.1%545K4.02
    30 August 20242.0M-5.9%428K4.74
    15 August 20242.2M-3.6%806K2.67
    31 July 20242.2M+7.6%704K3.17
    15 July 20242.1M-5.2%582K3.57
    28 June 20242.2M+19.4%609K3.60
    14 June 20241.8M-24.0%627K2.93
    31 May 20242.4M+26.4%373K6.46
    15 May 20241.9M-6.3%540K3.53
    30 April 20242.0M+0.7%509K4.00
    15 April 20242.0M+2.3%491K4.11
    28 March 20242.0M-2.2%506K3.90
    15 March 20242.0M+22.1%615K3.28
    29 February 20241.7M+5.9%705K2.35
    15 February 20241.6M+4.2%908K1.72
    31 January 20241.5M-10.2%805K1.86
    12 January 20241.7M+21.2%661K2.52
    29 December 20231.4M-17.7%517K2.66
    15 December 20231.7M+1.9%741K2.26
    30 November 20231.6M+7.7%581K2.82
    15 November 20231.5M-1.8%674K2.26
    31 October 20231.6M+0.2%634K2.45
    13 October 20231.5M+2.8%461K3.36
    29 September 20231.5M+25.3%494K3.05
    15 September 20231.2M-11.4%681K1.77
    31 August 20231.4M+13.0%402K3.38
    15 August 20231.2M-9.7%593K2.03
    31 July 20231.3M-18.8%543K2.45
    14 July 20231.6M-10.6%419K3.91
    30 June 20231.8M-7.4%566K3.24
    15 June 20232.0M+13.4%553K3.58
    31 May 20231.7M+15.9%576K3.03
    15 May 20231.5M-5.3%529K2.85
    28 April 20231.6M+6.9%468K3.39
    14 April 20231.5M-5.9%448K3.32
    31 March 20231.6M+5.7%611K2.58
    15 March 20231.5M-21.2%759K1.97
    28 February 20231.9M+27.5%647K2.93
    15 February 20231.5M+9.4%703K2.12
    31 January 20231.4M+18.4%507K2.68
    13 January 20231.1M-13.9%512K2.24
    30 December 20221.3M+18.3%366K3.64
    15 December 20221.1M+17.1%368K3.06
    30 November 2022962K-15.0%332K2.89
    15 November 20221.1M-10.0%423K2.68
    31 October 20221.3M-9.6%370K3.39
    14 October 20221.4M+22.5%405K3.43
    30 September 20221.1M+2.8%349K3.26
    15 September 20221.1M+1.7%363K3.04
    31 August 20221.1M+0.9%753K1.44
    15 August 20221.1M-0.3%575K1.87
    29 July 20221.1M-3.4%403K2.68
    15 July 20221.1M+9.2%334K3.35
    30 June 20221.0M-22.8%343K2.99
    15 June 20221.3M+8.3%300K4.42
    31 May 20221.2M-7.6%319K3.84
    13 May 20221.3M+11.5%503K2.64
    29 April 20221.2M+14.0%365K3.26
    14 April 20221.0M+3.3%629K1.66
    31 March 20221.0M+5.3%636K1.59
    15 March 2022959K+39.5%511K1.88
    28 February 2022687K-13.2%364K1.89
    15 February 2022791K+2.5%540K1.46
    31 January 2022772K-3.1%457K1.69
    14 January 2022796K-16.4%473K1.68
    31 December 2021953K-1.4%425K2.24
    15 December 2021966K+32.4%440K2.19
    30 November 2021730K+1.6%442K1.65
    15 November 2021718K-32.8%452K1.59
    29 October 20211.1M-2.2%332K3.22
    15 October 20211.1M-1.0%265K4.13
    30 September 20211.1M-9.4%222K4.98
    15 September 20211.2M+13.4%172K7.07
    31 August 20211.1M+18.7%286K3.76
    13 August 2021905K+9.3%244K3.71
    30 July 2021828K-0.8%180K4.59
    15 July 2021835K+11.7%197K4.23
    30 June 2021747K-1.2%250K2.99
    15 June 2021757K+11.5%142K5.34
    28 May 2021678K+10.4%148K4.58
    14 May 2021615K-9.7%302K2.03
    30 April 2021681K-12.1%288K2.36
    15 April 2021774K+9.4%507K1.53
    31 March 2021708K-15.2%389K1.82
    15 March 2021834K-14.3%360K2.32
    26 February 2021973K+9.5%294K3.31
    12 February 2021888K-8.5%288K3.08
    29 January 2021971K-15.2%495K1.96
    15 January 20211.1M+44.6%542K2.11
    31 December 2020792K+16.9%239K3.32
    15 December 2020678K+22.4%249K2.73
    30 November 2020554K-11.7%200K2.77
    13 November 2020627K-14.4%271K2.31
    30 October 2020733K-0.4%184K3.98
    15 October 2020736K+7.5%252K2.91
    30 September 2020685K-5.3%312K2.19
    15 September 2020723K-3.7%350K2.07
    31 August 2020750K-15.2%256K2.93
    14 August 2020885K-7.4%543K1.63
    31 July 2020956K-8.4%233K4.10
    15 July 20201.0M-11.7%334K3.12
    30 June 20201.2M+7.7%430K2.75
    15 June 20201.1M+2.7%394K2.79
    29 May 20201.1M+1.3%328K3.26
    15 May 20201.1M-2.0%477K2.21
    30 April 20201.1M+6.8%259K4.16
    15 April 20201.0M-11.1%287K3.51
    31 March 20201.1M-22.0%346K3.27
    13 March 20201.5M+14.2%282K5.14
    28 February 20201.3M+10.4%332K3.82
    14 February 20201.2M+4.1%366K3.15
    31 January 20201.1M-16.7%172K6.42
    15 January 20201.3M+3.9%166K7.99
    31 December 20191.3M+1.5%191K6.71
    13 December 20191.3M+2.3%212K5.95
    29 November 20191.2M+10.7%207K5.96
    15 November 20191.1M-0.3%241K4.62
    31 October 20191.1M+45.2%190K5.87
    15 October 2019768K+5.9%188K4.08
    30 September 2019726K+16.8%243K2.99
    13 September 2019621K-8.7%274K2.26
    30 August 2019680K+9.8%254K2.68
    15 August 2019620K+18.2%226K2.74
    31 July 2019524K-27.9%225K2.33
    15 July 2019727K-12.3%129K5.64
    28 June 2019829K+7.5%167K4.96
    14 June 2019771K-6.6%264K2.92
    31 May 2019826K-24.1%231K3.57
    15 May 20191.1M+10.7%358K3.04
    30 April 2019983K+6.2%163K6.04
    15 April 2019926K-11.6%198K4.69
    29 March 20191.0M-3.0%155K6.78
    15 March 20191.1M-16.6%187K5.79
    28 February 20191.3M-7.3%213K6.08
    15 February 20191.4M+19.1%237K5.91
    31 January 20191.2M-4.4%255K4.61
    15 January 20191.2M-14.3%220K5.58
    31 December 20181.4M-15.7%292K4.91
    14 December 20181.7M-2.0%203K8.39
    30 November 20181.7M+11.2%232K7.49
    15 November 20181.6M-2.1%274K5.69
    31 October 20181.6M-14.8%312K5.11
    15 October 20181.9M-1.5%300K6.23
    28 September 20181.9M-10.4%273K6.96
    14 September 20182.1M-2.9%335K6.33
    31 August 20182.2M-4.9%309K7.07
    15 August 20182.3M-3.2%393K5.84
    31 July 20182.4M-12.6%346K6.86
    13 July 20182.7M-3.1%310K8.76
    29 June 20182.8M+5.3%529K5.30
    15 June 20182.7M+2.7%369K7.22
    31 May 20182.6M+20.0%385K6.74
    15 May 20182.2M+0.6%322K6.70
    30 April 20182.1M-6.0%257K8.35
    13 April 20182.3M-7.0%233K9.82
    29 March 20182.5M+9.7%393K6.26
    15 March 20182.2M-0.2%472K4.75
    28 February 20182.2M+12.9%295K7.61
    15 February 20182.0M-8.3%550K3.62
    31 January 20182.2M-18.2%700K3.10
    12 January 20182.6M+4.0%361K7.35
    29 December 20172.5M356K7.17
    Shares in millions (M) or thousands (K); hold the pointer on a figure for the exact count. Counts before a split are restated to today's shares. FINRA publishes consolidated short interest twice a month, about ten days after each settlement.