How many institutions held TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in Q4 2018?

127 institutional investors reported TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value for Q4 2018. 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 2018 13F Holders as of 31 Dec 2018

Type / Class: Equity / Common Stock, $0.01 par value
Shares outstanding: 48,165,948
Total 13F shares: 36,425,113
Share change: +1,354,618
Total reported value: $655,369,091
Put/Call ratio: 104%
Price per share: $17.98
Number of holders: 127
Value change: +$19,861,102
Number of buys: 61
Number of sells: 69

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.

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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 2019
Previous quarter: Q3 2018

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%	21,988,473	$639,865,000	—	30 Sep 2018	13F
VANGUARD GROUP INC	13F	Company	1.7%	834,739	$24,292,000	—	30 Sep 2018	13F
BlackRock Finance, Inc.	13F	Company	1.6%	778,113	$22,642,000	—	30 Sep 2018	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	1.6%	774,015	$22,524,000	—	30 Sep 2018	13F
Russell Investments Group, Ltd.	13F	Company	1.5%	743,870	$21,645,000	—	30 Sep 2018	13F
JANUS HENDERSON GROUP PLC	13F	Company	1.5%	731,454	$21,285,000	—	30 Sep 2018	13F
Penn Capital Management Company, LLC	13F	Company	0.99%	474,970	$15,216,000	—	30 Sep 2018	13F
PRUDENTIAL FINANCIAL INC	13F	Company	1%	488,025	$14,201,000	—	30 Sep 2018	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.94%	452,959	$13,181,000	—	30 Sep 2018	13F
Allianz Asset Management GmbH	13F	Company	0.93%	449,113	$13,069,000	—	30 Sep 2018	13F
ROYCE & ASSOCIATES LP	13F	Company	0.8%	383,859	$11,170,000	—	30 Sep 2018	13F
AQR CAPITAL MANAGEMENT LLC	13F	Company	0.78%	374,546	$10,899,000	—	30 Sep 2018	13F
NORTHPOINTE CAPITAL LLC	13F	Company	0.71%	340,278	$9,902,000	—	30 Sep 2018	13F
TEACHERS ADVISORS, LLC	13F	Company	0.58%	278,555	$8,106,000	—	30 Sep 2018	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.58%	277,655	$8,080,000	—	30 Sep 2018	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.55%	263,162	$7,658,000	—	30 Sep 2018	13F
Boston Partners	13F	Company	0.52%	250,848	$7,300,000	—	30 Sep 2018	13F
CITADEL ADVISORS LLC	13F	Company	0.49%	238,163	$6,930,000	—	30 Sep 2018	13F
Gotham Asset Management, LLC	13F	Company	0.49%	235,610	$6,856,000	—	30 Sep 2018	13F
NORTHERN TRUST CORP	13F	Company	0.46%	222,325	$6,470,000	—	30 Sep 2018	13F
STATE STREET CORP	13F	Company	0.45%	217,399	$6,327,000	—	30 Sep 2018	13F
FRANKLIN RESOURCES INC	13F	Company	0.41%	195,192	$5,680,000	—	30 Sep 2018	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.36%	174,877	$5,089,000	—	30 Sep 2018	13F
Cortina Asset Management, LLC	13F	Company	0.34%	165,894	$4,828,000	—	30 Sep 2018	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.34%	162,950	$4,741,000	—	30 Sep 2018	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.31%	151,603	$4,411,000	—	30 Sep 2018	13F
Man Group plc	13F	Company	0.31%	148,833	$4,331,000	—	30 Sep 2018	13F
Brandywine Global Investment Management, LLC	13F	Company	0.3%	145,782	$4,243,000	—	30 Sep 2018	13F
Invesco Ltd.	13F	Company	0.3%	143,963	$4,189,000	—	30 Sep 2018	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.29%	139,362	$4,055,000	—	30 Sep 2018	13F
CLARK ESTATES INC/NY	13F	Company	0.28%	136,000	$3,958,000	—	30 Sep 2018	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.28%	135,285	$3,937,000	—	30 Sep 2018	13F
MACKAY SHIELDS LLC	13F	Company	0.27%	128,200	$3,731,000	—	30 Sep 2018	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	0.26%	123,930	$3,606,000	—	30 Sep 2018	13F
D. E. Shaw & Co., Inc.	13F	Company	0.23%	109,340	$3,182,000	—	30 Sep 2018	13F
FIRST TRUST ADVISORS LP	13F	Company	0.21%	102,713	$2,989,000	—	30 Sep 2018	13F
Horizon Kinetics LLC	13F	Company	0.2%	97,506	$2,838,000	—	30 Sep 2018	13F
CITIGROUP INC	13F	Company	0.19%	93,244	$2,714,000	—	30 Sep 2018	13F
Vident Investment Advisory, LLC	13F	Company	0.19%	90,592	$2,636,000	—	30 Sep 2018	13F
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	13F	Company	0.17%	83,568	$2,432,000	—	30 Sep 2018	13F
KING LUTHER CAPITAL MANAGEMENT CORP	13F	Company	0.15%	73,865	$2,149,000	—	30 Sep 2018	13F
JAMES INVESTMENT RESEARCH, INC.	13F	Company	0.15%	73,770	$2,147,000	—	30 Sep 2018	13F
NORGES BANK	13F	Company	0.12%	60,000	$1,746,000	—	30 Sep 2018	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.11%	53,604	$1,560,000	—	30 Sep 2018	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.11%	53,581	$1,559,000	—	30 Sep 2018	13F
MAD RIVER INVESTORS	13F	Company	0.11%	53,300	$1,551,000	—	30 Sep 2018	13F
GSA CAPITAL PARTNERS LLP	13F	Company	0.11%	51,127	$1,488,000	—	30 Sep 2018	13F
Bowling Portfolio Management LLC	13F	Company	0.1%	49,937	$1,453,000	—	30 Sep 2018	13F
Kepos Capital LP	13F	Company	0.1%	48,839	$1,421,000	—	30 Sep 2018	13F
JPMORGAN CHASE & CO	13F	Company	0.1%	48,386	$1,408,000	—	30 Sep 2018	13F

Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) as of Q4 2018

As of 31 Dec 2018, MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) was held by 127 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 36,425,113 shares. The largest 10 holders included WEXFORD CAPITAL LP, Russell Investments Group, Ltd., Boston Partners, Vanguard Group Inc, BlackRock Inc., PRINCIPAL FINANCIAL GROUP INC, Allianz Asset Management GmbH, JANUS HENDERSON GROUP PLC, PRUDENTIAL FINANCIAL INC, and PENN CAPITAL MANAGEMENT CO INC. This page lists 127 institutional shareholders reporting positions in this security for the Q4 2018 filing period.

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

Compare Q4 2018 vs Q3 2018 Across Filers

Q3 2018 holders

135

Q4 2018 holders

127

Holder diff

-8

Investor	Q3 2018 Shares	Q4 2018 Shares	Share Diff	Share Chg %	Q3 2018 Value $	Q4 2018 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.