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Amtech Systems Inc. short interest

1.4M shares of Amtech Systems were sold short at the 15 October 2026 settlement, near the top of its range over the last year (207K to 1.6M). Short sellers would need 5.9 days of normal trading to buy them back.

Shares sold short1.4Mat 15 Oct 2026
Change on the settlement before-13.5%+360% over a year
Days to cover5.90at 231K shares a day
Of shares in issue7.78%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 near the top of its range over the last year (207K to 1.6M), and the share price moved +53% 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 20261.4M-13.5%231K5.90
    30 September 20261.6M-0.9%282K5.59
    15 September 20261.6M-1.9%282K5.65
    31 August 20261.6M+29.1%580K2.80
    14 August 20261.3M+4.1%347K3.62
    31 July 20261.2M+14.9%334K3.62
    15 July 20261.0M+45.6%439K2.39
    30 June 2026721K+61.1%572K1.26
    15 June 2026448K+44.9%571K1.00
    29 May 2026309K-9.6%315K1.00
    15 May 2026342K+3.6%354K1.00
    30 April 2026330K+8.5%268K1.23
    15 April 2026304K+6.8%188K1.62
    31 March 2026285K-13.4%196K1.45
    13 March 2026329K-11.6%160K2.06
    27 February 2026372K-6.3%169K2.20
    13 February 2026396K-8.8%633K1.00
    30 January 2026434K+16.7%625K1.00
    15 January 2026372K+18.0%272K1.37
    31 December 2025316K+40.4%279K1.13
    15 December 2025225K+8.8%193K1.16
    28 November 2025207K-21.3%93K2.22
    14 November 2025263K+0.9%150K1.75
    31 October 2025260K-12.2%168K1.55
    15 October 2025296K+76.5%495K1.00
    30 September 2025168K+75.9%308K1.00
    15 September 202595K+63.6%512K1.00
    29 August 202558K-31.4%117K1.00
    15 August 202585K-10.6%50K1.71
    31 July 202595K+22.8%31K3.12
    15 July 202577K-18.6%39K2.01
    30 June 202595K-2.9%39K2.46
    13 June 202598K-9.2%28K3.48
    30 May 2025108K-12.0%68K1.58
    15 May 2025122K+82.4%85K1.44
    30 April 202567K-6.5%45K1.48
    15 April 202572K+18.4%81K1.00
    31 March 202561K+27.6%86K1.00
    14 March 202547K+101.5%50K1.00
    28 February 202524K-42.9%79K1.00
    14 February 202541K-2.6%56K1.00
    31 January 202542K-18.7%34K1.26
    15 January 202552K-25.9%30K1.75
    31 December 202470K+25.1%56K1.25
    13 December 202456K+5.7%43K1.29
    29 November 202453K-7.0%25K2.17
    15 November 202457K+31.1%30K1.88
    31 October 202444K+15.8%49K1.00
    15 October 202438K-18.0%37K1.00
    30 September 202446K+65.2%33K1.39
    13 September 202428K-32.8%23K1.21
    30 August 202441K-30.5%27K1.55
    15 August 202460K+33.7%50K1.19
    31 July 202445K-26.7%61K1.00
    15 July 202461K+11.6%42K1.43
    28 June 202454K-3.1%65K1.00
    14 June 202456K-20.7%37K1.52
    31 May 202471K+46.3%41K1.74
    15 May 202448K-22.0%34K1.42
    30 April 202462K+1.4%28K2.24
    15 April 202461K-11.1%40K1.52
    28 March 202469K+5.4%36K1.91
    15 March 202465K-17.5%50K1.31
    29 February 202479K+7.1%53K1.50
    15 February 202474K-11.7%147K1.00
    31 January 202484K+5.9%82K1.02
    12 January 202479K+6.1%102K1.00
    29 December 202375K-42.6%264K1.00
    15 December 2023130K+163.3%295K1.00
    30 November 202349K-6.5%18K2.74
    15 November 202353K-20.3%16K3.40
    31 October 202366K-23.2%21K3.12
    13 October 202386K+2.5%14K6.30
    29 September 202384K-2.3%22K3.75
    15 September 202386K+3.5%48K1.77
    31 August 202383K+34.4%45K1.83
    15 August 202362K+10.5%61K1.01
    31 July 202356K+15.3%44K1.27
    14 July 202349K+8.6%32K1.54
    30 June 202345K-14.4%26K1.72
    15 June 202352K+13.1%19K2.68
    31 May 202346K+5.6%27K1.73
    15 May 202344K-3.4%32K1.35
    28 April 202345K-18.0%14K3.13
    14 April 202355K+2.2%28K2.00
    31 March 202354K+8.1%26K2.04
    15 March 202350K+15.8%35K1.42
    28 February 202343K-7.4%27K1.58
    15 February 202347K-28.6%113K1.00
    31 January 202365K+27.6%43K1.52
    13 January 202351K+9.0%29K1.79
    30 December 202247K+6.1%40K1.17
    15 December 202244K-17.3%63K1.00
    30 November 202253K-1.5%30K1.77
    15 November 202254K+3.6%26K2.10
    31 October 202252K-13.8%18K2.86
    14 October 202261K-1.9%18K3.32
    30 September 202262K-9.9%31K1.99
    15 September 202269K+15.4%26K2.65
    31 August 202259K+32.9%93K1.00
    15 August 202245K-27.7%32K1.42
    29 July 202262K-14.9%19K3.25
    15 July 202273K-6.0%32K2.24
    30 June 202277K-7.7%26K2.98
    15 June 202284K-9.2%24K3.53
    31 May 202292K-41.8%29K3.19
    13 May 2022158K+16.3%64K2.46
    29 April 2022136K-3.7%38K3.63
    14 April 2022141K+1.7%43K3.28
    31 March 2022139K-28.9%54K2.59
    15 March 2022196K+12.0%48K4.08
    28 February 2022175K-10.7%99K1.76
    15 February 2022196K-5.0%51K3.86
    31 January 2022206K+22.0%62K3.30
    14 January 2022169K-20.3%49K3.46
    31 December 2021212K+15.2%59K3.58
    15 December 2021184K+20.7%186K1.00
    30 November 2021152K+11.7%253K1.00
    15 November 2021136K-21.1%105K1.29
    29 October 2021172K+7.7%178K1.00
    15 October 2021160K-0.5%55K2.93
    30 September 2021161K+22.1%118K1.37
    15 September 2021132K-25.0%108K1.22
    31 August 2021176K-5.4%43K4.07
    13 August 2021186K+10.0%87K2.12
    30 July 2021169K+9.5%59K2.86
    15 July 2021154K+15.0%82K1.88
    30 June 2021134K-33.6%116K1.16
    15 June 2021202K+0.2%100K2.02
    28 May 2021201K-12.2%133K1.51
    14 May 2021229K+136.9%226K1.02
    30 April 202197K+18.4%161K1.00
    15 April 202182K-4.0%241K1.00
    31 March 202185K-4.5%239K1.00
    15 March 202189K+155.5%287K1.00
    26 February 202135K-29.0%247K1.00
    12 February 202149K+27.7%90K1.00
    29 January 202138K+20.0%44K1.00
    15 January 202132K+76.3%54K1.00
    31 December 202018K+7.8%50K1.00
    15 December 202017K+92.1%70K1.00
    30 November 20209K-0.7%33K1.00
    13 November 20209K-45.1%11K1.00
    30 October 202016K+31.3%30K1.00
    15 October 202012K-34.9%36K1.00
    30 September 202019K-56.0%29K1.00
    15 September 202043K-10.1%44K1.00
    31 August 202048K+63.2%62K1.00
    14 August 202029K-43.8%55K1.00
    31 July 202052K+46.8%35K1.50
    15 July 202035K+14.4%47K1.00
    30 June 202031K+27.3%40K1.00
    15 June 202024K-16.9%28K1.00
    29 May 202029K-1.2%27K1.07
    15 May 202030K-26.1%36K1.00
    30 April 202040K-14.9%42K1.00
    15 April 202047K+17.4%33K1.43
    31 March 202040K+14.8%58K1.00
    13 March 202035K-36.5%73K1.00
    28 February 202055K+1.2%94K1.00
    14 February 202054K+16.8%98K1.00
    31 January 202047K-75.7%108K1.00
    15 January 2020192K-13.3%36K5.38
    31 December 2019221K-7.5%47K4.73
    13 December 2019239K-4.6%42K5.68
    29 November 2019250K-0.9%61K4.08
    15 November 2019253K-6.8%27K9.47
    31 October 2019271K-4.8%35K7.85
    15 October 2019285K-2.4%38K7.57
    30 September 2019292K-5.8%26K11.32
    13 September 2019310K-8.9%31K9.96
    30 August 2019340K-7.8%43K7.94
    15 August 2019369K-3.9%42K8.82
    31 July 2019384K-10.3%42K9.11
    15 July 2019428K-18.4%57K7.46
    28 June 2019524K-1.1%91K5.76
    14 June 2019531K+12.1%70K7.53
    31 May 2019473K-1.3%36K13.17
    15 May 2019480K-6.5%51K9.45
    30 April 2019513K-6.6%93K5.50
    15 April 2019549K-2.6%182K3.02
    29 March 2019564K-8.5%42K13.35
    15 March 2019616K-6.6%41K15.05
    28 February 2019659K-4.9%30K22.18
    15 February 2019693K-15.7%74K9.42
    31 January 2019822K-7.5%50K16.39
    15 January 2019889K-14.3%41K21.80
    31 December 20181.0M+1.7%109K9.50
    14 December 20181.0M-8.4%102K10.00
    30 November 20181.1M+3.5%140K7.94
    15 November 20181.1M+6.3%90K11.96
    31 October 20181.0M+0.5%100K10.08
    15 October 20181.0M-1.2%129K7.84
    28 September 20181.0M-6.9%123K8.27
    14 September 20181.1M+7.0%112K9.74
    31 August 20181.0M+48.6%203K5.05
    15 August 2018689K-3.7%289K2.38
    31 July 2018716K+14.7%152K4.70
    13 July 2018624K+18.5%204K3.06
    29 June 2018526K+33.6%269K1.96
    15 June 2018394K+270.9%566K1.00
    31 May 2018106K+144.3%352K1.00
    15 May 201843K-28.2%227K1.00
    30 April 201861K-6.3%115K1.00
    13 April 201865K-10.1%155K1.00
    29 March 201872K+1.8%121K1.00
    15 March 201871K+39.6%122K1.00
    28 February 201851K+25.7%189K1.00
    15 February 201840K-87.2%232K1.00
    31 January 2018314K+2.0%225K1.40
    12 January 2018308K+22.3%205K1.50
    29 December 2017252K214K1.18
    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.