Mammoth Energy Services Inc. (TUSK)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	1,469,099	$4,113,477	0%
2.	Dimensional Fund Advisors Lp	993,914	$2,783,117	0%
3.	Vanguard Group Inc	957,241	$2,680,274	0%
4.	Geode Capital Management, Llc	580,659	$1,626,013	0%
5.	State Street Corp	408,763	$1,144,536	0%