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MAMMOTH ENERGY SVCS INC
MAMMOTH ENERGY SVCS INC. Institutional holdings reported to the SEC.

Institutional Holders (2016Q4)
Portfolio Summary: 64 Institutional holders with a total value of $429,642,932.
#
Manager Name
Shares
Value ($)
%
Options
Notes
1 WEXFORD CAPITAL LP 20,443,903 310,747,000 72.33%
2 Perkins Investment Management, LLC 2,585,354 39,297,000 9.15%
3 AMERICAN CENTURY COMPANIES INC 641,765 9,755,000 2.27%
4 PRINCIPAL FINANCIAL GROUP INC 599,787 9,116,000 2.12%
5 Pine River Capital Management L.P. 515,000 7,828,000 1.82%
6 OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) 380,285 5,780,000 1.35%
7 VANGUARD GROUP INC 323,961 4,924,000 1.15%
8 DRIEHAUS CAPITAL MANAGEMENT LLC 292,731 4,450,000 1.04%
9 FRANKLIN RESOURCES INC 270,000 4,104,000 0.96%
10 BlackRock Fund Advisors 234,343 3,562,000 0.83%
11 Laurion Capital Management LP 200,000 3,040,000 0.71%
12 MILLENNIUM MANAGEMENT LLC 163,874 2,491,000 0.58%
13 Spark Investment Management LLC 141,100 2,144,000 0.50%
14 RUSSELL INVESTMENTS GROUP, LTD. 102,246 1,534,000 0.36%
15 Omega Advisors Inc. 100,000 1,520,000 0.35%
16 GEODE CAPITAL MANAGEMENT, LLC 98,311 1,494,000 0.35%
17 Nokomis Capital, L.L.C. 92,696 1,409,000 0.33%
18 NORTHERN TRUST CORP 92,425 1,405,000 0.33%
19 Numeric Investors LLC 89,210 1,356,000 0.32%
20 Oceanic Investment Management LTD 79,658 1,211,000 0.28%
21 STATE STREET CORP 73,921 1,124,000 0.26%
22 CARDINAL CAPITAL MANAGEMENT LLC /CT 69,110 1,050,000 0.24%
23 BlackRock Institutional Trust Company, N.A. 68,811 1,046,000 0.24%
24 PEREGRINE CAPITAL MANAGEMENT INC /MN/ 54,527 829,000 0.19%
25 Boston Partners 47,600 724,000 0.17%
26 BlackRock Group LTD 41,826 636,000 0.15%
27 WELLS FARGO & COMPANY/MN 38,076 579,000 0.13%
28 SEI INVESTMENTS CO 32,695 497,000 0.12%
29 Hutchin Hill Capital, LP 32,600 496,000 0.12%
30 VICTORY CAPITAL MANAGEMENT INC 30,000 456,000 0.11%
31 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 28,124 428,000 0.10%
32 MORGAN STANLEY 24,086 366,000 0.09%
33 POINT72 EUROPE (LONDON) LLP 21,926 333,000 0.08%
34 WESTPAC BANKING CORP 20,785 315,932 0.07%
35 1st Global Advisors, Inc. 19,884 302,000 0.07%
36 CITADEL ADVISORS LLC 19,601 298,000 0.07%
37 K.J. Harrison & Partners Inc 19,371 294,000 0.07%
38 GLG Partners LP 18,717 284,000 0.07%
39 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 16,200 246,000 0.06%
40 Bank of New York Mellon Corp 15,333 233,000 0.05%
41 Evercore Wealth Management, LLC 15,000 228,000 0.05%
42 TIAA CREF INVESTMENT MANAGEMENT LLC 13,449 204,000 0.05%
43 CREDIT SUISSE AG/ 13,338 202,000 0.05%
44 TEACHERS ADVISORS, LLC 12,138 184,000 0.04%
45 JPMORGAN CHASE & CO 11,792 179,000 0.04%
46 ACROSPIRE INVESTMENT MANAGEMENT LLC 8,353 127,000 0.03%
47 CITIGROUP INC 7,898 120,000 0.03%
48 BLACKROCK ADVISORS LLC 7,446 113,000 0.03%
49 BlackRock Investment Management, LLC 6,346 96,000 0.02%
50 BlackRock Finance, Inc. 5,646 86,000 0.02%
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From 2023-01-03 onward, the SEC requires values to be reported in nearest dollars. Earlier filings reported values in thousands; therefore, positions shown as $0 in older filings may represent actual values between $0–$999.