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HowShorted

How shorted is Mammoth Energy Services, Inc.? TUSK

#3,580most shorted US stockof 3,805 ranked stocks, more shorted than 5%

0.18%
of shares outstanding reported short · settlement date 15 Sep 2026
vs previous report
−0.01
5 reports (~10 weeks)
−1.40
days to cover
1.11
Aggregate net short position time series for Mammoth Energy Services, Inc.

Markers along the chart's base: ▲ results announced (an 8-K reporting results was filed) ▲ quarterly or annual report filed. Dates are SEC filing dates; hover a point to see events since the previous settlement.

Days to cover

FINRA's own figure: reported shares short divided by the stock's average daily trading volume, published alongside each settlement. It expresses the short position in days of typical trading rather than as a percentage of the company; the two can move differently.

Aggregate net short position time series for Mammoth Energy Services, Inc. days to cover

Short interest around results

For each results announcement (an 8-K reporting results, by its SEC filing date), the FINRA settlement before it and the first one after. Settlements fall twice a month, so the two figures can sit up to a month apart and much else changes in between: this shows what was reported, not why.

Reported short interest before and after each results announcement
Results filedSettlement beforeSettlement afterChange
11 May 20261.79% 30 Apr 20261.58% 15 May 2026−0.21
6 Mar 20261.44% 27 Feb 20261.79% 13 Mar 2026+0.35
31 Oct 20250.49% 15 Oct 20250.56% 14 Nov 2025+0.07
8 Aug 20250.40% 31 Jul 20250.45% 15 Aug 2025+0.05
7 May 20251.21% 30 Apr 20251.14% 15 May 2025−0.07
7 Mar 20250.92% 28 Feb 20251.04% 14 Mar 2025+0.12
1 Nov 20240.60% 31 Oct 20240.70% 15 Nov 2024+0.10
9 Aug 20240.49% 31 Jul 20240.65% 15 Aug 2024+0.16

Fails to deliver

The SEC's fails-to-deliver figure for TUSK: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Last balance on file
566
2 Sep 2026
Highest in window
121,782
26 Jun 2026
Days with a balance
38
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Mammoth Energy Services, Inc. fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 122K shares.

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Sector: Energy

History

Full reported short interest history
Settlement dateShort %Change
15 Sep 20260.18%−0.01
31 Aug 20260.19%−0.07
14 Aug 20260.26%−1.39
15 Jun 20261.65%+0.13
29 May 20261.52%−0.06
15 May 20261.58%−0.21
30 Apr 20261.79%−0.23
15 Apr 20262.02%−0.15
31 Mar 20262.17%+0.38
13 Mar 20261.79%+0.35
27 Feb 20261.44%+0.04
13 Feb 20261.40%−0.06
30 Jan 20261.46%−0.01
15 Jan 20261.47%−0.06
31 Dec 20251.53%+0.19
15 Dec 20251.34%+0.58
28 Nov 20250.76%+0.20
14 Nov 20250.56%+0.16
31 Oct 20250.40%−0.09
15 Oct 20250.49%−0.01
30 Sep 20250.50%+0.01
15 Sep 20250.49%+0.05
29 Aug 20250.44%−0.01
15 Aug 20250.45%+0.05
31 Jul 20250.40%−0.04
15 Jul 20250.44%−0.20
30 Jun 20250.64%−0.15
13 Jun 20250.79%−0.26
30 May 20251.05%−0.09
15 May 20251.14%−0.07
30 Apr 20251.21%−0.08
15 Apr 20251.29%+0.21
31 Mar 20251.08%+0.04
14 Mar 20251.04%+0.12
28 Feb 20250.92%+0.11
14 Feb 20250.81%+0.12
31 Jan 20250.69%−0.23
15 Jan 20250.92%+0.13
31 Dec 20240.79%+0.22
13 Dec 20240.57%−0.09
29 Nov 20240.66%−0.04
15 Nov 20240.70%+0.10
31 Oct 20240.60%−0.09
15 Oct 20240.69%+0.11
30 Sep 20240.58%−0.07
13 Sep 20240.65%+0.03
30 Aug 20240.62%−0.03
15 Aug 20240.65%+0.16
31 Jul 20240.49%+0.06
15 Jul 20240.43%−0.01
28 Jun 20240.44%−0.08
14 Jun 20240.52%−0.02
31 May 20240.54%−0.10
15 May 20240.64%+0.02
30 Apr 20240.62%−0.12
15 Apr 20240.74%−0.06
28 Mar 20240.80%−0.12
15 Mar 20240.92%−0.10
29 Feb 20241.02%0.00
15 Feb 20241.02%−0.14
31 Jan 20241.16%−0.18
12 Jan 20241.34%+0.15
29 Dec 20231.19%−0.10
15 Dec 20231.29%+0.07
30 Nov 20231.22%+0.07
15 Nov 20231.15%−0.02
31 Oct 20231.17%−0.07
13 Oct 20231.24%−0.11
29 Sep 20231.35%−0.05
15 Sep 20231.40%−0.30
31 Aug 20231.70%−0.03
15 Aug 20231.73%+0.16
31 Jul 20231.57%−0.52
14 Jul 20232.09%−0.08
30 Jun 20232.17%+1.17
15 Jun 20231.00%−0.03
31 May 20231.03%+0.25
15 May 20230.78%+0.11
28 Apr 20230.67%−0.24
14 Apr 20230.91%−0.09
31 Mar 20231.00%+0.44
15 Mar 20230.56%+0.12
28 Feb 20230.44%−0.31
15 Feb 20230.75%+0.10
31 Jan 20230.65%+0.07
13 Jan 20230.58%−0.01
30 Dec 20220.59%+0.34
15 Dec 20220.25%−0.07
30 Nov 20220.32%−0.08
15 Nov 20220.40%−0.02
31 Oct 20220.42%+0.09
14 Oct 20220.33%−0.01
30 Sep 20220.34%−0.02
15 Sep 20220.36%−0.04
31 Aug 20220.40%+0.08
15 Aug 20220.32%+0.05
29 Jul 20220.27%−0.06
15 Jul 20220.33%+0.02
30 Jun 20220.31%+0.11
15 Jun 20220.20%−0.28
31 May 20220.48%+0.04
13 May 20220.44%+0.14
29 Apr 20220.30%−0.03
14 Apr 20220.33%+0.15
31 Mar 20220.18%+0.04
15 Mar 20220.14%−1.84
30 Nov 20211.98%+0.47
15 Nov 20211.51%+0.03
29 Oct 20211.48%−0.04
15 Oct 20211.52%0.00
30 Sep 20211.52%−0.28
15 Sep 20211.80%0.00
31 Aug 20211.80%−0.05
13 Aug 20211.85%−0.01
30 Jul 20211.86%+0.06
15 Jul 20211.80%−0.07
30 Jun 20211.87%−0.08
15 Jun 20211.95%−0.02
28 May 20211.97%+0.35
14 May 20211.62%+0.65
30 Apr 20210.97%+0.22
15 Apr 20210.75%−0.03
31 Mar 20210.78%−0.01
15 Mar 20210.79%−0.09
26 Feb 20210.88%+0.18
12 Feb 20210.70%−0.01
29 Jan 20210.71%−0.09
15 Jan 20210.80%−0.09
31 Dec 20200.89%−0.08
15 Dec 20200.97%+0.41
30 Nov 20200.56%−0.13
13 Nov 20200.69%−0.42
30 Oct 20201.11%−0.19
15 Oct 20201.30%−0.23
30 Sep 20201.53%−0.51
15 Sep 20202.04%−0.24
31 Aug 20202.28%−0.64
14 Aug 20202.92%−0.54
31 Jul 20203.46%−0.51
15 Jul 20203.97%−0.08
30 Jun 20204.05%−0.63
15 Jun 20204.68%+0.79
29 May 20203.89%−0.13
15 May 20204.02%−0.15
30 Apr 20204.17%−0.33
15 Apr 20204.50%−0.02
31 Mar 20204.52%−1.46
13 Mar 20205.98%−0.46
28 Feb 20206.44%+1.11
14 Feb 20205.33%+0.17
31 Jan 20205.16%+0.05
15 Jan 20205.11%+0.34
31 Dec 20194.77%−0.32
13 Dec 20195.09%−0.23
29 Nov 20195.32%−0.02
15 Nov 20195.34%+0.63
31 Oct 20194.71%−0.59
15 Oct 20195.30%–

Newest first. Scroll inside the table for earlier dates, back to 15 Oct 2019.

Frequently asked questions

How shorted is Mammoth Energy Services, Inc. right now?
0.18% of Mammoth Energy Services, Inc.'s (TUSK) shares outstanding were reported short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report. That makes it the 3,580th most shorted US stock, out of 3,805 we rank.
What does this number include?
FINRA member firms must report their short positions in all US equities twice a month; FINRA consolidates them per security. We divide that official share count by the company's shares outstanding from its SEC filings. This is the regulatory figure, not a daily estimate.
Why does it only update twice a month?
US short interest is reported for settlement on the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. That cadence is set by regulation; no daily official figure exists.
Is this TUSK's short float?
No. This is short interest as a percentage of shares outstanding, the count in the company's SEC filings. "Short float" divides the same FINRA short count by the public float, which excludes closely held shares, so it comes out higher for the same company. We publish no float estimates: the float is not a regulatory figure.
What is TUSK's days to cover?
1.11 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume. It is published in the same FINRA file and shown verbatim; we hold no volume data ourselves.
Which funds are short?
US public short interest is aggregate-only: individual short sellers are not named. Only some EU markets publish named positions.