How many institutions held TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in Q1 2021?

51 institutional investors reported TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value for Q1 2021. 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

Q1 2021 13F Holders as of 31 Mar 2021

Type / Class: Equity / Common Stock, $0.01 par value
Shares outstanding: 48,165,948
Total 13F shares: 28,821,230
Share change: +5,330
Total reported value: $186,224,971
Price per share: $5.32
Number of holders: 51
Value change: +$33,094,718
Number of buys: 29
Number of sells: 15

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?
Open the full security ownership history page.

Related Filing Research

Latest 13F filings for newly reported positions.
Latest Schedule 13D/13G reports for ownership changes outside 13F cadence.
Latest 10-Q/10-K reports for financial context tied to this issuer.
Recent insider transactions for executive and insider activity.
SEC investors directory and top value investors for manager drilldown.
Back to full security ownership history.

Explore More Reporting Periods

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

Newer quarter: Q2 2021
Previous quarter: Q4 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%	22,066,259	$98,195,000	—	31 Dec 2020	13F
VALUEWORKS LLC	13F	Company	7%	3,367,799	$14,987,000	—	31 Dec 2020	13F
VANGUARD GROUP INC	13F	Company	1.1%	509,567	$2,267,000	—	31 Dec 2020	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	0.98%	471,500	$2,098,000	—	31 Dec 2020	13F
BlackRock Finance, Inc.	13F	Company	0.64%	308,698	$1,374,000	—	31 Dec 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.59%	286,268	$1,273,000	—	31 Dec 2020	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.56%	271,409	$1,208,000	—	31 Dec 2020	13F
Invesco Ltd.	13F	Company	0.47%	226,557	$1,008,000	—	31 Dec 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.43%	205,786	$916,000	—	31 Dec 2020	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.32%	154,500	$688,000	—	31 Dec 2020	13F
Bank of New York Mellon Corp	13F	Company	0.23%	111,655	$497,000	—	31 Dec 2020	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.21%	98,972	$440,000	—	31 Dec 2020	13F
NORTHERN TRUST CORP	13F	Company	0.17%	84,130	$374,000	—	31 Dec 2020	13F
WINTON GROUP Ltd	13F	Company	0.14%	68,688	$306,000	—	31 Dec 2020	13F
683 Capital Management, LLC	13F	Company	0.14%	65,166	$290,000	—	31 Dec 2020	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.13%	62,893	$280,000	—	31 Dec 2020	13F
Trek Financial, LLC	13F	Company	0.13%	60,474	$269,000	—	31 Dec 2020	13F
STIFEL FINANCIAL CORP	13F	Company	0.12%	55,572	$247,000	—	31 Dec 2020	13F
Cambridge Investment Research Advisors, Inc.	13F	Company	0.11%	54,529	$243,000	—	31 Dec 2020	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.1%	50,215	$223,000	—	31 Dec 2020	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.08%	39,677	$177,000	—	31 Dec 2020	13F
One68 Global Capital, LLC	13F	Company	0.07%	33,142	$147,000	—	31 Dec 2020	13F
BOOTHBAY FUND MANAGEMENT, LLC	13F	Company	0.07%	31,390	$140,000	—	31 Dec 2020	13F
CAPSTONE INVESTMENT ADVISORS, LLC	13F	Company	0.06%	27,452	$122,000	—	31 Dec 2020	13F
NJ State Employees Deferred Compensation Plan	13F	Company	0.05%	24,000	$107,000	—	31 Dec 2020	13F
CITADEL ADVISORS LLC	13F	Company	0.04%	21,408	$96,000	—	31 Dec 2020	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.03%	15,843	$71,000	—	31 Dec 2020	13F
MAD RIVER INVESTORS	13F	Company	0.02%	11,700	$52,000	—	31 Dec 2020	13F
Schonfeld Strategic Advisors LLC	13F	Company	0.02%	10,800	$48,000	—	31 Dec 2020	13F
MORGAN STANLEY	13F	Company	0.02%	10,456	$47,000	—	31 Dec 2020	13F
ExodusPoint Capital Management, LP	13F	Company	0.02%	10,045	$45,000	—	31 Dec 2020	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.01%	6,500	$29,000	—	31 Dec 2020	13F
ACADIAN ASSET MANAGEMENT LLC	13F	Company	0.01%	6,497	$29,000	—	31 Dec 2020	13F
CITIGROUP INC	13F	Company	0.01%	5,894	$26,000	—	31 Dec 2020	13F
ROYAL BANK OF CANADA	13F	Company	0.01%	3,060	$13,000	—	31 Dec 2020	13F
NEXT Financial Group, Inc	13F	Company	0.01%	2,600	$12,000	—	31 Dec 2020	13F
American Portfolios Advisors	13F	Company	0%	2,280	$10,146	—	31 Dec 2020	13F
OSAIC HOLDINGS, INC.	13F	Company	0%	2,123	$9,000	—	31 Dec 2020	13F
GROUP ONE TRADING LLC	13F	Company	0%	1,100	$5,000	—	31 Dec 2020	13F
SIMPLEX TRADING, LLC	13F	Company	0%	864	$3,000	—	31 Dec 2020	13F
BNP PARIBAS FINANCIAL MARKETS	13F	Company	0%	534	$2,376	—	31 Dec 2020	13F
BANK OF AMERICA CORP /DE/	13F	Company	0%	402	$2,000	—	31 Dec 2020	13F
WELLS FARGO & COMPANY/MN	13F	Company	0%	229	$1,000	—	31 Dec 2020	13F
INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC	13F	Company	0%	204	$1,000	—	31 Dec 2020	13F

Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) as of Q1 2021

As of 31 Mar 2021, MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) was held by 51 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 28,821,230 shares. The largest 10 holders included WEXFORD CAPITAL LP, VALUEWORKS LLC, VANGUARD GROUP INC, BRIDGEWAY CAPITAL MANAGEMENT, LLC, GEODE CAPITAL MANAGEMENT, LLC, BlackRock Inc., MILLENNIUM MANAGEMENT LLC, DIMENSIONAL FUND ADVISORS LP, TWO SIGMA ADVISERS, LP, and RENAISSANCE TECHNOLOGIES LLC. This page lists 51 institutional shareholders reporting positions in this security for the Q1 2021 filing period.

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

Compare Q1 2021 vs Q4 2020 Across Filers

Q4 2020 holders

Q1 2021 holders

Holder diff

Investor	Q4 2020 Shares	Q1 2021 Shares	Share Diff	Share Chg %	Q4 2020 Value $	Q1 2021 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.