How many institutions held TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in Q2 2018?

144 institutional investors reported TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value for Q2 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

Q2 2018 13F Holders as of 30 Jun 2018

Type / Class: Equity / Common Stock, $0.01 par value
Shares outstanding: 48,165,948
Total 13F shares: 36,821,466
Share change: +3,799,046
Total reported value: $1,250,503,738
Price per share: $33.96
Number of holders: 144
Value change: +$129,250,314
Number of buys: 106
Number of sells: 39

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: Q3 2018
Previous quarter: Q1 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	52%	25,013,764	$801,941,000	—	31 Mar 2018	13F
JANUS HENDERSON GROUP PLC	13F	Company	2.7%	1,308,948	$41,965,000	—	31 Mar 2018	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	1.1%	553,252	$17,737,000	—	31 Mar 2018	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	1.1%	543,043	$17,410,000	—	31 Mar 2018	13F
BlackRock Finance, Inc.	13F	Company	1%	498,090	$15,969,000	—	31 Mar 2018	13F
VANGUARD GROUP INC	13F	Company	0.88%	426,256	$13,666,000	—	31 Mar 2018	13F
Penn Capital Management Company, LLC	13F	Company	0.74%	358,081	$11,497,000	—	31 Mar 2018	13F
NORTHPOINTE CAPITAL LLC	13F	Company	0.64%	309,858	$9,934,000	—	31 Mar 2018	13F
ROYCE & ASSOCIATES LP	13F	Company	0.61%	292,172	$9,367,000	—	31 Mar 2018	13F
DRIEHAUS CAPITAL MANAGEMENT LLC	13F	Company	0.57%	275,059	$8,818,000	—	31 Mar 2018	13F
Cortina Asset Management, LLC	13F	Company	0.51%	247,555	$7,937,000	—	31 Mar 2018	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.41%	198,400	$6,361,000	—	31 Mar 2018	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.36%	175,262	$5,619,000	—	31 Mar 2018	13F
THB ASSET MANAGEMENT	13F	Company	0.32%	152,898	$4,901,000	—	31 Mar 2018	13F
STATE STREET CORP	13F	Company	0.29%	139,071	$4,456,000	—	31 Mar 2018	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.27%	131,296	$4,209,000	—	31 Mar 2018	13F
CastleArk Alternatives, LLC	13F	Company	0.22%	107,803	$3,456,000	—	31 Mar 2018	13F
DEUTSCHE BANK AG\	13F	Company	0.21%	101,787	$3,262,000	—	31 Mar 2018	13F
NORTHERN TRUST CORP	13F	Company	0.21%	101,736	$3,262,000	—	31 Mar 2018	13F
Russell Investments Group, Ltd.	13F	Company	0.21%	101,302	$3,247,000	—	31 Mar 2018	13F
FRANKLIN RESOURCES INC	13F	Company	0.21%	99,102	$3,177,000	—	31 Mar 2018	13F
MORGAN STANLEY	13F	Company	0.2%	95,145	$3,051,000	—	31 Mar 2018	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.2%	93,967	$3,013,000	—	31 Mar 2018	13F
Boston Partners	13F	Company	0.17%	84,100	$2,696,000	—	31 Mar 2018	13F
CASTLEARK MANAGEMENT LLC	13F	Company	0.16%	78,124	$2,505,000	—	31 Mar 2018	13F
KING LUTHER CAPITAL MANAGEMENT CORP	13F	Company	0.16%	76,520	$2,453,000	—	31 Mar 2018	13F
JPMORGAN CHASE & CO	13F	Company	0.15%	74,576	$2,391,000	—	31 Mar 2018	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.14%	69,422	$2,226,000	—	31 Mar 2018	13F
RAYMOND JAMES & ASSOCIATES	13F	Company	0.13%	63,894	$2,048,000	—	31 Mar 2018	13F
Informed Momentum Co LLC	13F	Company	0.12%	60,101	$1,927,000	—	31 Mar 2018	13F
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	13F	Company	0.12%	55,675	$1,785,000	—	31 Mar 2018	13F
ZACKS INVESTMENT MANAGEMENT	13F	Company	0.11%	55,006	$1,763,000	—	31 Mar 2018	13F
Alambic Investment Management, L.P.	13F	Company	0.11%	50,680	$1,625,000	—	31 Mar 2018	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.1%	49,224	$1,578,000	—	31 Mar 2018	13F
Bank of New York Mellon Corp	13F	Company	0.09%	43,503	$1,394,000	—	31 Mar 2018	13F
Global IMC LLC	13F	Company	0.09%	43,164	$1,384,000	—	31 Mar 2018	13F
Engineers Gate Manager LP	13F	Company	0.09%	41,674	$1,336,000	—	31 Mar 2018	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.08%	38,674	$1,239,000	—	31 Mar 2018	13F
QS Investors, LLC	13F	Company	0.08%	37,946	$1,217,000	—	31 Mar 2018	13F
ELLINGTON MANAGEMENT GROUP LLC	13F	Company	0.07%	36,000	$1,154,000	—	31 Mar 2018	13F
Evercore Wealth Management, LLC	13F	Company	0.07%	35,000	$1,122,000	—	31 Mar 2018	13F
PANAGORA ASSET MANAGEMENT INC	13F	Company	0.07%	33,468	$1,073,000	—	31 Mar 2018	13F
VICTORY CAPITAL MANAGEMENT INC	13F	Company	0.06%	31,217	$1,000,000	—	31 Mar 2018	13F
CITADEL ADVISORS LLC	13F	Company	0.06%	30,996	$993,000	—	31 Mar 2018	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.06%	28,989	$929,000	—	31 Mar 2018	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.05%	24,321	$780,000	—	31 Mar 2018	13F
OXFORD ASSET MANAGEMENT LLP	13F	Company	0.05%	22,739	$729,000	—	31 Mar 2018	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	0.04%	18,043	$578,000	—	31 Mar 2018	13F
Energy Opportunities Capital Management, LLC	13F	Company	0.04%	17,390	$558,000	—	31 Mar 2018	13F
Mesirow Financial Investment Management, Inc.	13F	Company	0.04%	17,196	$551,000	—	31 Mar 2018	13F

Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) as of Q2 2018

As of 30 Jun 2018, MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) was held by 144 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 36,821,466 shares. The largest 10 holders included Wexford Capital LP, JANUS HENDERSON GROUP PLC, PRINCIPAL FINANCIAL GROUP INC, BlackRock Inc., MILLENNIUM MANAGEMENT LLC, VANGUARD GROUP INC, CREDIT SUISSE AG/, PENN CAPITAL MANAGEMENT CO INC, Laurion Capital Management LP, and Monashee Investment Management LLC. This page lists 144 institutional shareholders reporting positions in this security for the Q2 2018 filing period.

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

Compare Q2 2018 vs Q1 2018 Across Filers

Q1 2018 holders

104

Q2 2018 holders

144

Holder diff

Investor	Q1 2018 Shares	Q2 2018 Shares	Share Diff	Share Chg %	Q1 2018 Value $	Q2 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.