Mammoth Energy Services Inc. (TUSK)

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Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	1,460,797	$2,980,025	0%
2.	Bank Of New York Mellon Corp	121,249	$247,348	0%
3.	Rhumbline Advisers	24,047	$49,050	0%
4.	Penbrook Management Llc	14,000	$28,560	0.02%
5.	Archer Investment Corp	12,200	$24,888	0.01%