MAMMOTH ENERGY SVCS INC

Ticker: TUSK CUSIP: 56155L108 Class: COM

Nationwide Fund Advisors's Holding History (CIK: 0001097218)

Note: Option positions (PUT/CALL) are excluded.

Q3 2017

Shares 10,076 Value ($000) $170 Avg Close $14.60 Range $10.88 - $20.42

Q2 2017

Shares 10,276 Value ($000) $191 Avg Close $18.67 Range $15.80 - $22.31

Q1 2017

Shares 2,683 Value ($000) $58 Avg Close $19.07 Range $15.07 - $24.54

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2017	10,076	$170	$14.60	$10.88 - $20.42
Q2 2017	10,276	$191	$18.67	$15.80 - $22.31
Q1 2017	2,683	$58	$19.07	$15.07 - $24.54