Mammoth Energy Services Inc. (TUSK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	1,460,797	$2,980,025	0%
2.	Dimensional Fund Advisors Lp	1,001,204	$2,042,593	0%
3.	Vanguard Group Inc	944,535	$1,926,851	0%
4.	Geode Capital Management, Llc	545,164	$1,112,283	0%
5.	State Street Corp	402,363	$820,821	0%