Mammoth Energy Services Inc. (TUSK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	1,475,885	$4,427,655	0%
2.	Dimensional Fund Advisors Lp	991,223	$2,973,236	0%
3.	Vanguard Group Inc	946,697	$2,840,091	0%
4.	Geode Capital Management, Llc	537,376	$1,612,347	0%
5.	Bridgeway Capital Management Inc	460,274	$1,380,822	0.03%