How many institutions held TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in Q2 2019?

97 institutional investors reported TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value for Q2 2019. 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 2019 13F Holders as of 30 Jun 2019

Type / Class: Equity / Common Stock, $0.01 par value
Shares outstanding: 48,165,948
Total 13F shares: 36,162,372
Share change: -518,297
Total reported value: $248,800,594
Put/Call ratio: 446%
Price per share: $6.88
Number of holders: 97
Value change: -$31,054,786
Number of buys: 56
Number of sells: 80

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.

Next holder-history checks

These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.

Back to full security ownership history for the broader multi-quarter picture.
Latest 13F filings for newly reported positions across managers.
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: Q3 2019
Previous quarter: Q1 2019

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	$366,108,000	—	31 Mar 2019	13F
JANUS HENDERSON GROUP PLC	13F	Company	3%	1,467,133	$24,428,000	—	31 Mar 2019	13F
Russell Investments Group, Ltd.	13F	Company	2.3%	1,116,412	$18,594,000	—	31 Mar 2019	13F
VANGUARD GROUP INC	13F	Company	1.9%	899,232	$14,972,000	—	31 Mar 2019	13F
BlackRock Finance, Inc.	13F	Company	1.7%	841,468	$14,010,000	—	31 Mar 2019	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	1.6%	783,007	$13,037,000	—	31 Mar 2019	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	1.2%	575,394	$9,580,000	—	31 Mar 2019	13F
Allianz Asset Management GmbH	13F	Company	1.2%	572,484	$9,532,000	—	31 Mar 2019	13F
Boston Partners	13F	Company	0.96%	464,618	$7,736,000	—	31 Mar 2019	13F
Penn Capital Management Company, LLC	13F	Company	0.86%	412,732	$6,872,000	—	31 Mar 2019	13F
PRUDENTIAL FINANCIAL INC	13F	Company	0.81%	392,025	$6,527,000	—	31 Mar 2019	13F
Bank of New York Mellon Corp	13F	Company	0.73%	351,095	$5,846,000	—	31 Mar 2019	13F
SCHRODER INVESTMENT MANAGEMENT GROUP	13F	Company	0.72%	348,307	$5,799,000	—	31 Mar 2019	13F
ROYCE & ASSOCIATES LP	13F	Company	0.69%	331,470	$5,519,000	—	31 Mar 2019	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.59%	284,926	$4,744,000	—	31 Mar 2019	13F
TEACHERS ADVISORS, LLC	13F	Company	0.58%	278,828	$4,642,000	—	31 Mar 2019	13F
AQR CAPITAL MANAGEMENT LLC	13F	Company	0.55%	265,813	$4,426,000	—	31 Mar 2019	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	0.52%	251,400	$4,186,000	—	31 Mar 2019	13F
STATE STREET CORP	13F	Company	0.48%	233,053	$3,880,000	—	31 Mar 2019	13F
NORTHERN TRUST CORP	13F	Company	0.46%	221,974	$3,696,000	—	31 Mar 2019	13F
State of New Jersey Common Pension Fund D	13F	Company	0.46%	220,000	$3,663,000	—	31 Mar 2019	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.44%	211,348	$3,519,000	—	31 Mar 2019	13F
LSV ASSET MANAGEMENT	13F	Company	0.42%	199,900	$3,328,000	—	31 Mar 2019	13F
Cortina Asset Management, LLC	13F	Company	0.39%	189,666	$3,158,000	—	31 Mar 2019	13F
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC	13F	Company	0.39%	185,570	$3,090,000	—	31 Mar 2019	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.39%	185,445	$3,088,000	—	31 Mar 2019	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.38%	182,639	$3,040,000	—	31 Mar 2019	13F
MARSHALL WACE, LLP	13F	Company	0.38%	182,530	$3,039,000	—	31 Mar 2019	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	0.33%	160,780	$2,677,000	—	31 Mar 2019	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.29%	141,767	$2,360,000	—	31 Mar 2019	13F
CLARK ESTATES INC/NY	13F	Company	0.28%	136,000	$2,264,000	—	31 Mar 2019	13F
FRANKLIN RESOURCES INC	13F	Company	0.28%	133,327	$2,220,000	—	31 Mar 2019	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.26%	125,577	$2,091,000	—	31 Mar 2019	13F
FIRST TRUST ADVISORS LP	13F	Company	0.26%	124,019	$2,065,000	—	31 Mar 2019	13F
AMUNDI ASSET MANAGEMENT US, INC.	13F	Company	0.21%	99,486	$1,657,000	—	31 Mar 2019	13F
Man Group plc	13F	Company	0.2%	96,666	$1,609,000	—	31 Mar 2019	13F
D. E. Shaw & Co., Inc.	13F	Company	0.2%	93,945	$1,564,000	—	31 Mar 2019	13F
Forest Hill Capital, LLC	13F	Company	0.18%	87,500	$1,457,000	—	31 Mar 2019	13F
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO	13F	Company	0.17%	83,227	$1,386,000	—	31 Mar 2019	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.17%	82,100	$1,367,000	—	31 Mar 2019	13F
MACKAY SHIELDS LLC	13F	Company	0.15%	72,059	$1,200,000	—	31 Mar 2019	13F
Kepos Capital LP	13F	Company	0.14%	69,178	$1,152,000	—	31 Mar 2019	13F
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	0.14%	68,467	$1,140,000	—	31 Mar 2019	13F
PANAGORA ASSET MANAGEMENT INC	13F	Company	0.13%	63,995	$1,066,000	—	31 Mar 2019	13F
KING LUTHER CAPITAL MANAGEMENT CORP	13F	Company	0.13%	63,695	$1,061,000	—	31 Mar 2019	13F
NORGES BANK	13F	Company	0.12%	60,000	$999,000	—	31 Mar 2019	13F
GLOBEFLEX CAPITAL L P	13F	Company	0.12%	56,452	$940,000	—	31 Mar 2019	13F
Bowling Portfolio Management LLC	13F	Company	0.11%	54,662	$910,000	—	31 Mar 2019	13F
DEUTSCHE BANK AG\	13F	Company	0.11%	54,667	$909,000	—	31 Mar 2019	13F
PNC FINANCIAL SERVICES GROUP, INC.	13F	Company	0.11%	53,592	$893,000	—	31 Mar 2019	13F

Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) as of Q2 2019

As of 30 Jun 2019, MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) was held by 97 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 36,162,372 shares. The largest 10 holders included Wexford Capital LP, JANUS HENDERSON GROUP PLC, Russell Investments Group, Ltd., Boston Partners, BlackRock Inc., VANGUARD GROUP INC, DIMENSIONAL FUND ADVISORS LP, PRINCIPAL FINANCIAL GROUP INC, HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC, and Bank of New York Mellon Corp. This page lists 97 institutional shareholders reporting positions in this security for the Q2 2019 filing period.

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

Compare Q2 2019 vs Q1 2019 Across Filers

Q1 2019 holders

134

Q2 2019 holders

Holder diff

-37

Investor	Q1 2019 Shares	Q2 2019 Shares	Share Diff	Share Chg %	Q1 2019 Value $	Q2 2019 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.