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Mammoth Energy Services, Inc. short interest

101K shares of Mammoth Energy Services were sold short at the 15 October 2026 settlement, near the bottom of its range over the last year (89K to 1.0M). Short sellers would need 1.2 days of normal trading to buy them back.

Shares sold short101Kat 15 Oct 2026
Change on the settlement before-9.1%-58% over a year
Days to cover1.20at 84K shares a day
Of shares in issue0.21%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 (89K to 1.0M), and the share price moved +40% 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 2026101K-9.1%84K1.20
    30 September 2026111K+24.4%94K1.18
    15 September 202689K-3.3%80K1.11
    31 August 202692K-26.5%185K1.00
    14 August 2026125K+18.2%276K1.00
    31 July 2026106K-8.6%165K1.00
    15 July 2026116K-12.7%177K1.00
    30 June 2026132K-83.4%699K1.00
    15 June 2026797K+8.3%281K2.84
    29 May 2026737K-3.4%387K1.90
    15 May 2026762K-12.0%453K1.68
    30 April 2026866K-11.4%310K2.79
    15 April 2026978K-6.7%232K4.21
    31 March 20261.0M+21.3%365K2.87
    13 March 2026864K+24.5%342K2.53
    27 February 2026694K+2.7%137K5.05
    13 February 2026676K-4.1%162K4.16
    30 January 2026705K-0.8%164K4.29
    15 January 2026711K-3.6%324K2.19
    31 December 2025737K+14.1%289K2.55
    15 December 2025646K+76.1%505K1.28
    28 November 2025367K+35.5%107K3.42
    14 November 2025271K+40.3%117K2.32
    31 October 2025193K-18.8%95K2.03
    15 October 2025238K-2.1%106K2.25
    30 September 2025243K+3.4%131K1.86
    15 September 2025235K+11.2%69K3.40
    29 August 2025211K-1.9%80K2.63
    15 August 2025215K+12.4%117K1.84
    31 July 2025192K-10.1%77K2.49
    15 July 2025213K-30.5%77K2.76
    30 June 2025307K-18.9%155K1.97
    13 June 2025379K-25.2%96K3.94
    30 May 2025506K-7.4%168K3.01
    15 May 2025547K-6.0%103K5.30
    30 April 2025581K-6.7%196K2.97
    15 April 2025623K+19.4%369K1.69
    31 March 2025522K+4.0%94K5.57
    14 March 2025502K+13.9%167K3.02
    28 February 2025441K+12.6%94K4.71
    14 February 2025392K+17.5%46K8.51
    31 January 2025333K-24.7%71K4.71
    15 January 2025443K+16.2%64K6.94
    31 December 2024381K+38.1%107K3.55
    13 December 2024276K-12.7%94K2.95
    29 November 2024316K-6.3%104K3.05
    15 November 2024337K+16.0%135K2.50
    31 October 2024291K-12.1%73K3.96
    15 October 2024331K+17.5%126K2.62
    30 September 2024281K-9.6%132K2.13
    13 September 2024311K+4.3%74K4.22
    30 August 2024298K-4.8%102K2.94
    15 August 2024313K+34.3%156K2.01
    31 July 2024233K+12.9%600K1.00
    15 July 2024207K-1.4%71K2.91
    28 June 2024210K-16.7%68K3.06
    14 June 2024252K-2.8%32K7.84
    31 May 2024259K-16.1%50K5.20
    15 May 2024308K+4.1%69K4.47
    30 April 2024296K-16.3%33K8.97
    15 April 2024354K-8.0%102K3.46
    28 March 2024385K-12.8%42K9.25
    15 March 2024441K-10.1%57K7.68
    29 February 2024490K-0.0%42K11.77
    15 February 2024490K-11.7%56K8.77
    31 January 2024555K-13.8%70K7.91
    12 January 2024644K+12.9%81K7.99
    29 December 2023571K-8.1%90K6.32
    15 December 2023621K+6.1%110K5.65
    30 November 2023585K+6.4%70K8.32
    15 November 2023550K-1.9%74K7.44
    31 October 2023560K-5.7%79K7.10
    13 October 2023594K-8.5%82K7.21
    29 September 2023649K-3.1%76K8.51
    15 September 2023670K-17.7%110K6.07
    31 August 2023813K-2.0%93K8.71
    15 August 2023830K+10.6%316K2.63
    31 July 2023751K-24.9%161K4.68
    14 July 2023999K-3.4%155K6.44
    30 June 20231.0M+116.3%557K1.86
    15 June 2023478K-2.7%135K3.55
    31 May 2023492K+32.8%110K4.46
    15 May 2023370K+16.0%173K2.14
    28 April 2023319K-26.0%113K2.83
    14 April 2023431K-8.7%130K3.32
    31 March 2023472K+77.6%212K2.23
    15 March 2023266K+28.9%248K1.07
    28 February 2023206K-42.0%268K1.00
    15 February 2023356K+15.0%197K1.81
    31 January 2023309K+13.5%199K1.55
    13 January 2023273K-3.1%342K1.00
    30 December 2022281K+133.5%387K1.00
    15 December 2022120K-20.0%167K1.00
    30 November 2022151K-20.8%183K1.00
    15 November 2022190K-4.3%475K1.00
    31 October 2022199K+25.5%231K1.00
    14 October 2022158K-1.5%91K1.74
    30 September 2022161K-6.4%164K1.00
    15 September 2022172K-9.3%90K1.90
    31 August 2022189K+23.4%239K1.00
    15 August 2022153K+20.0%267K1.00
    29 July 2022128K-16.7%99K1.29
    15 July 2022153K+4.4%90K1.71
    30 June 2022147K+54.0%139K1.06
    15 June 202295K-57.7%149K1.00
    31 May 2022226K+10.2%121K1.87
    13 May 2022205K+48.0%233K1.00
    29 April 2022138K-10.5%231K1.00
    14 April 2022155K+85.0%660K1.00
    31 March 202284K+31.4%337K1.00
    15 March 202264K-42.6%1.5M1.00
    28 February 2022111K+40.6%132K1.00
    15 February 202279K-23.1%63K1.25
    31 January 2022103K+0.2%68K1.51
    14 January 2022102K-36.7%82K1.25
    31 December 2021162K-34.2%100K1.62
    15 December 2021246K-73.5%219K1.12
    30 November 2021927K+31.7%2.8M1.00
    15 November 2021703K+1.5%84K8.39
    29 October 2021693K-2.5%50K13.89
    15 October 2021711K-0.0%92K7.70
    30 September 2021711K-15.6%140K5.09
    15 September 2021842K+0.1%89K9.42
    31 August 2021841K-2.9%53K15.85
    13 August 2021866K-0.5%61K14.18
    30 July 2021870K+4.7%66K13.17
    15 July 2021831K-4.0%93K8.91
    30 June 2021866K-4.0%115K7.56
    15 June 2021902K-1.1%64K14.14
    28 May 2021912K+21.6%77K11.81
    14 May 2021750K+67.3%112K6.71
    30 April 2021448K+31.3%145K3.08
    15 April 2021341K-4.9%86K3.97
    31 March 2021359K-0.1%181K1.98
    15 March 2021359K-11.2%190K1.89
    26 February 2021405K+27.1%487K1.00
    12 February 2021318K-2.6%80K3.97
    29 January 2021327K-10.2%119K2.74
    15 January 2021364K-10.6%131K2.79
    31 December 2020408K-8.1%287K1.42
    15 December 2020443K+73.5%1.3M1.00
    30 November 2020256K-18.8%151K1.69
    13 November 2020315K-37.9%60K5.22
    30 October 2020507K-14.9%60K8.46
    15 October 2020595K-14.9%58K10.18
    30 September 2020699K-25.2%171K4.08
    15 September 2020935K-10.5%115K8.14
    31 August 20201.0M-21.8%77K13.54
    14 August 20201.3M-15.7%144K9.29
    31 July 20201.6M-11.5%136K11.63
    15 July 20201.8M-2.1%105K17.07
    30 June 20201.8M-13.4%309K5.90
    15 June 20202.1M+20.4%509K4.15
    29 May 20201.8M-3.3%322K5.44
    15 May 20201.8M-3.7%320K5.66
    30 April 20201.9M-7.3%243K7.74
    15 April 20202.0M-0.5%270K7.50
    31 March 20202.0M-24.5%234K8.70
    13 March 20202.7M-7.2%325K8.29
    28 February 20202.9M+21.1%302K9.62
    14 February 20202.4M+3.3%148K16.27
    31 January 20202.3M+1.0%237K9.80
    15 January 20202.3M+7.1%464K4.97
    31 December 20192.1M-6.2%600K3.58
    13 December 20192.3M-4.4%188K12.17
    29 November 20192.4M-0.4%296K8.08
    15 November 20192.4M+13.4%629K3.82
    31 October 20192.1M-11.0%361K5.86
    15 October 20192.4M+4.7%434K5.50
    30 September 20192.3M-5.5%464K4.90
    13 September 20192.4M+2.0%416K5.79
    30 August 20192.4M+12.7%342K6.90
    15 August 20192.1M+8.4%407K5.15
    31 July 20191.9M+1.7%361K5.35
    15 July 20191.9M+5.5%350K5.43
    28 June 20191.8M+26.8%464K3.88
    14 June 20191.4M-15.7%894K1.59
    31 May 20191.7M-17.3%328K5.14
    15 May 20192.0M-3.9%293K6.95
    30 April 20192.1M-11.3%207K10.25
    15 April 20192.4M+16.2%236K10.12
    29 March 20192.1M-0.8%364K5.65
    15 March 20192.1M+1.5%272K7.62
    28 February 20192.0M+5.2%133K15.41
    15 February 20191.9M-2.8%163K11.91
    31 January 20192.0M+2.0%197K10.12
    15 January 20192.0M+2.3%210K9.33
    31 December 20181.9M+8.7%218K8.78
    14 December 20181.8M-3.8%243K7.26
    30 November 20181.8M+0.8%168K10.88
    15 November 20181.8M+5.9%337K5.40
    31 October 20181.7M+4.5%217K7.89
    15 October 20181.6M-1.8%269K6.10
    28 September 20181.7M+17.9%392K4.27
    14 September 20181.4M-1.1%370K3.83
    31 August 20181.4M-2.5%577K2.49
    15 August 20181.5M+9.3%436K3.37
    31 July 20181.3M-15.3%361K3.74
    13 July 20181.6M-8.8%444K3.58
    29 June 20181.7M-5.3%1.2M1.44
    15 June 20181.8M+27.7%486K3.79
    31 May 20181.4M+9.1%409K3.52
    15 May 20181.3M+47.4%385K3.43
    30 April 2018896K-9.1%353K2.54
    13 April 2018986K-1.5%392K2.52
    29 March 20181.0M+23.7%269K3.71
    15 March 2018809K+35.5%333K2.43
    28 February 2018597K+56.2%330K1.81
    15 February 2018382K-4.3%140K2.72
    31 January 2018399K-10.8%171K2.33
    12 January 2018448K-13.1%109K4.11
    29 December 2017516K51K10.14
    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.