How many institutions held TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in Q4 2020?

44 institutional investors reported TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value for Q4 2020. Use the holders table for investor-level position and value details.

MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK)

Q: What does CUSIP 56155L108 represent in this 13F holders report?

CUSIP 56155L108 is the security identifier for TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value used to aggregate holder disclosures.

CUSIP: 56155L108

Q4 2020 13F Holders as of 31 Dec 2020

Type / Class: Equity / Common Stock, $0.01 par value
Shares outstanding: 48,165,948
Total 13F shares: 28,848,837
Share change: +293,124
Total reported value: $128,377,522
Price per share: $4.45
Number of holders: 44
Value change: +$1,866,250
Number of buys: 27
Number of sells: 13

Quarterly Holders Quick Answers

What is CUSIP 56155L108?
CUSIP 56155L108 identifies TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in SEC institutional holdings data.

Need full ownership history?
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Back to full security ownership history for the broader multi-quarter picture.
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Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
SEC investors directory for manager drilldown.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q1 2021
Previous quarter: Q3 2020

Recent filing periods for CUSIP 56155L108:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
WEXFORD CAPITAL LP	13F	Company	46%	22,045,273	$35,272,000	—	30 Sep 2020	13F
VALUEWORKS LLC	13F	Company	7.2%	3,463,635	$5,542,000	—	30 Sep 2020	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	0.98%	471,500	$754,000	—	30 Sep 2020	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.68%	329,417	$527,000	—	30 Sep 2020	13F
BlackRock Finance, Inc.	13F	Company	0.61%	293,128	$469,000	—	30 Sep 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.58%	278,218	$445,000	—	30 Sep 2020	13F
Invesco Ltd.	13F	Company	0.47%	225,532	$361,000	—	30 Sep 2020	13F
VANGUARD GROUP INC	13F	Company	0.46%	221,630	$355,000	—	30 Sep 2020	13F
WINTON GROUP Ltd	13F	Company	0.4%	194,342	$311,000	—	30 Sep 2020	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.36%	173,900	$278,000	—	30 Sep 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.26%	126,379	$202,000	—	30 Sep 2020	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.21%	102,846	$165,000	—	30 Sep 2020	13F
Bank of New York Mellon Corp	13F	Company	0.19%	90,626	$145,000	—	30 Sep 2020	13F
Squarepoint Ops LLC	13F	Company	0.17%	81,781	$131,000	—	30 Sep 2020	13F
NORTHERN TRUST CORP	13F	Company	0.15%	70,078	$112,000	—	30 Sep 2020	13F
STIFEL FINANCIAL CORP	13F	Company	0.12%	55,572	$89,000	—	30 Sep 2020	13F
Trek Financial, LLC	13F	Company	0.11%	54,897	$88,000	—	30 Sep 2020	13F
Cambridge Investment Research Advisors, Inc.	13F	Company	0.11%	53,921	$86,000	—	30 Sep 2020	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.11%	53,867	$86,000	—	30 Sep 2020	13F
New Jersey Better Educational Savings Trust	13F	Company	0.07%	31,600	$51,000	—	30 Sep 2020	13F
D. E. Shaw & Co., Inc.	13F	Company	0.06%	30,815	$49,000	—	30 Sep 2020	13F
Tower Research Capital LLC (TRC)	13F	Company	0.06%	26,769	$43,000	—	30 Sep 2020	13F
NJ State Employees Deferred Compensation Plan	13F	Company	0.05%	24,000	$38,000	—	30 Sep 2020	13F
JANE STREET GROUP, LLC	13F	Company	0.04%	18,570	$30,000	—	30 Sep 2020	13F
First Allied Advisory Services, Inc.	13F	Company	0.04%	18,000	$29,000	—	30 Sep 2020	13F
MAD RIVER INVESTORS	13F	Company	0.02%	11,700	$19,000	—	30 Sep 2020	13F
FIRST QUADRANT LLC/CA	13F	Company	0.01%	6,700	$11,000	—	30 Sep 2020	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.01%	6,500	$10,000	—	30 Sep 2020	13F
NEXT Financial Group, Inc	13F	Company	0.01%	2,600	$4,000	—	30 Sep 2020	13F
BNP PARIBAS FINANCIAL MARKETS	13F	Company	0%	2,347	$3,755	—	30 Sep 2020	13F
American Portfolios Advisors	13F	Company	0%	2,280	$3,648	—	30 Sep 2020	13F
OSAIC HOLDINGS, INC.	13F	Company	0%	2,123	$3,000	—	30 Sep 2020	13F
UBS Group AG	13F	Company	0%	1,518	$2,000	—	30 Sep 2020	13F
ROYAL BANK OF CANADA	13F	Company	0%	1,000	$2,000	—	30 Sep 2020	13F
BANK OF AMERICA CORP /DE/	13F	Company	0%	803	$2,000	—	30 Sep 2020	13F

Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) as of Q4 2020

As of 31 Dec 2020, MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) was held by 44 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 28,848,837 shares. The largest 10 holders included WEXFORD CAPITAL LP, VALUEWORKS LLC, VANGUARD GROUP INC, BRIDGEWAY CAPITAL MANAGEMENT, LLC, BlackRock Inc., GEODE CAPITAL MANAGEMENT, LLC, MILLENNIUM MANAGEMENT LLC, Invesco Ltd., DIMENSIONAL FUND ADVISORS LP, and TWO SIGMA ADVISERS, LP. This page lists 44 institutional shareholders reporting positions in this security for the Q4 2020 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2020 vs Q3 2020 Across Filers

Q3 2020 holders

Q4 2020 holders

Holder diff

Investor	Q3 2020 Shares	Q4 2020 Shares	Share Diff	Share Chg %	Q3 2020 Value $	Q4 2020 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.