How many institutions held TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value in Q1 2017?

73 institutional investors reported TUSK - MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value for Q1 2017. 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 2017 13F Holders as of 31 Mar 2017

Type / Class: Equity / Common Stock, $0.01 par value
Shares outstanding: 48,165,948
Total 13F shares: 28,173,489
Share change: +265,534
Total reported value: $606,010,527
Price per share: $21.51
Number of holders: 73
Value change: +$9,736,067
Number of buys: 51
Number of sells: 34

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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Explore More Reporting Periods

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

Newer quarter: Q2 2017
Previous quarter: Q4 2016

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	42%	20,443,903	$310,747,000	—	31 Dec 2016	13F
Perkins Investment Management, LLC	13F	Company	5.4%	2,585,354	$39,297,000	—	31 Dec 2016	13F
AMERICAN CENTURY COMPANIES INC	13F	Company	1.3%	641,765	$9,755,000	—	31 Dec 2016	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	1.2%	599,787	$9,116,000	—	31 Dec 2016	13F
Pine River Capital Management L.P.	13F	Company	1.1%	515,000	$7,828,000	—	31 Dec 2016	13F
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)	13F	Company	0.79%	380,285	$5,780,000	—	31 Dec 2016	13F
VANGUARD GROUP INC	13F	Company	0.67%	323,961	$4,924,000	—	31 Dec 2016	13F
DRIEHAUS CAPITAL MANAGEMENT LLC	13F	Company	0.61%	292,731	$4,450,000	—	31 Dec 2016	13F
FRANKLIN RESOURCES INC	13F	Company	0.56%	270,000	$4,104,000	—	31 Dec 2016	13F
BlackRock Fund Advisors	13F	Company	0.49%	234,343	$3,562,000	—	31 Dec 2016	13F
Laurion Capital Management LP	13F	Company	0.42%	200,000	$3,040,000	—	31 Dec 2016	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.34%	163,874	$2,491,000	—	31 Dec 2016	13F
Spark Investment Management LLC	13F	Company	0.29%	141,100	$2,144,000	—	31 Dec 2016	13F
Russell Investments Group, Ltd.	13F	Company	0.21%	102,246	$1,534,000	—	31 Dec 2016	13F
Omega Advisors Inc.	13F	Company	0.21%	100,000	$1,520,000	—	31 Dec 2016	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.2%	98,311	$1,494,000	—	31 Dec 2016	13F
Nokomis Capital, L.L.C.	13F	Company	0.19%	92,696	$1,409,000	—	31 Dec 2016	13F
NORTHERN TRUST CORP	13F	Company	0.19%	92,425	$1,405,000	—	31 Dec 2016	13F
Numeric Investors LLC	13F	Company	0.19%	89,210	$1,356,000	—	31 Dec 2016	13F
Oceanic Investment Management LTD	13F	Company	0.17%	79,658	$1,211,000	—	31 Dec 2016	13F
STATE STREET CORP	13F	Company	0.15%	73,921	$1,124,000	—	31 Dec 2016	13F
CARDINAL CAPITAL MANAGEMENT LLC /CT	13F	Company	0.14%	69,110	$1,050,000	—	31 Dec 2016	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	0.14%	68,811	$1,046,000	—	31 Dec 2016	13F
PEREGRINE CAPITAL MANAGEMENT LLC	13F	Company	0.11%	54,527	$829,000	—	31 Dec 2016	13F
Boston Partners	13F	Company	0.1%	47,600	$724,000	—	31 Dec 2016	13F
BlackRock Group LTD	13F	Company	0.09%	41,826	$636,000	—	31 Dec 2016	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.08%	38,076	$579,000	—	31 Dec 2016	13F
SEI INVESTMENTS CO	13F	Company	0.07%	32,695	$497,000	—	31 Dec 2016	13F
Hutchin Hill Capital, LP	13F	Company	0.07%	32,600	$496,000	—	31 Dec 2016	13F
VICTORY CAPITAL MANAGEMENT INC	13F	Company	0.06%	30,000	$456,000	—	31 Dec 2016	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.06%	28,124	$428,000	—	31 Dec 2016	13F
MORGAN STANLEY	13F	Company	0.05%	24,086	$366,000	—	31 Dec 2016	13F
Point72 Europe (London) LLP	13F	Company	0.05%	21,926	$333,000	—	31 Dec 2016	13F
WESTPAC BANKING CORP	13F	Company	0.04%	20,785	$315,932	—	31 Dec 2016	13F
1st Global Advisors, Inc.	13F	Company	0.04%	19,884	$302,000	—	31 Dec 2016	13F
CITADEL ADVISORS LLC	13F	Company	0.04%	19,601	$298,000	—	31 Dec 2016	13F
K.J. Harrison & Partners Inc	13F	Company	0.04%	19,371	$294,000	—	31 Dec 2016	13F
GLG Partners LP	13F	Company	0.04%	18,717	$284,000	—	31 Dec 2016	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.03%	16,200	$246,000	—	31 Dec 2016	13F
Bank of New York Mellon Corp	13F	Company	0.03%	15,333	$233,000	—	31 Dec 2016	13F
Evercore Wealth Management, LLC	13F	Company	0.03%	15,000	$228,000	—	31 Dec 2016	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.03%	13,449	$204,000	—	31 Dec 2016	13F
CREDIT SUISSE AG/	13F	Company	0.03%	13,338	$202,000	—	31 Dec 2016	13F
TEACHERS ADVISORS, LLC	13F	Company	0.03%	12,138	$184,000	—	31 Dec 2016	13F
JPMORGAN CHASE & CO	13F	Company	0.02%	11,792	$179,000	—	31 Dec 2016	13F
Acrospire Investment Management LLC	13F	Company	0.02%	8,353	$127,000	—	31 Dec 2016	13F
CITIGROUP INC	13F	Company	0.02%	7,893	$120,000	—	31 Dec 2016	13F
BLACKROCK ADVISORS LLC	13F	Company	0.02%	7,446	$113,000	—	31 Dec 2016	13F
BlackRock Investment Management, LLC	13F	Company	0.01%	6,346	$96,000	—	31 Dec 2016	13F
BlackRock Finance, Inc.	13F	Company	0.01%	5,646	$86,000	—	31 Dec 2016	13F

Institutional Holders of MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) as of Q1 2017

As of 31 Mar 2017, MAMMOTH ENERGY SERVICES, INC. - Common Stock, $0.01 par value (TUSK) was held by 73 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 28,173,489 shares. The largest 10 holders included Wexford Capital LP, Perkins Investment Management, LLC, PRINCIPAL FINANCIAL GROUP INC, BlackRock Inc., AMERICAN CENTURY COMPANIES INC, UBS OCONNOR LLC, VANGUARD GROUP INC, Pine River Capital Management L.P., THOMSON HORSTMANN & BRYANT INC, and DRIEHAUS CAPITAL MANAGEMENT LLC. This page lists 73 institutional shareholders reporting positions in this security for the Q1 2017 filing period.

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

Compare Q1 2017 vs Q4 2016 Across Filers

Q4 2016 holders

Q1 2017 holders

Holder diff

Investor	Q4 2016 Shares	Q1 2017 Shares	Share Diff	Share Chg %	Q4 2016 Value $	Q1 2017 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.