Mammoth Energy Services Inc. (TUSK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock Inc.	1,496,945	$6,676,375	0%
2.	Vanguard Group Inc	706,403	$3,150,557	0%
3.	Dimensional Fund Advisors Lp	644,986	$2,877,012	0%
4.	Geode Capital Management, Llc	483,751	$2,157,771	0%
5.	State Street Corp	405,066	$1,806,594	0%