MAMMOTH ENERGY SVCS INC

Ticker: TUSK CUSIP: 56155L108 Class: COM

EMERALD ADVISERS, LLC's Holding History (CIK: 0001015083)

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

Q4 2018

Shares 11,119 Value ($000) $200 Avg Close $24.57 Range $16.81 - $30.61

Q3 2018

Shares 8,323 Value ($000) $242 Avg Close $32.95 Range $25.64 - $40.75

Q2 2018

Shares 7,493 Value ($000) $254 Avg Close $35.13 Range $28.34 - $42.30

Q1 2018

Shares 12,077 Value ($000) $387 Avg Close $24.99 Range $18.66 - $33.67

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	11,119	$200	$24.57	$16.81 - $30.61
Q3 2018	8,323	$242	$32.95	$25.64 - $40.75
Q2 2018	7,493	$254	$35.13	$28.34 - $42.30
Q1 2018	12,077	$387	$24.99	$18.66 - $33.67