MAMMOTH ENERGY SVCS INC

Ticker: TUSK CUSIP: 56155L108 Class: COM

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

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

Q2 2018

Shares 36,784 Value ($000) $1,249 Avg Close $35.13 Range $28.34 - $42.30

Q1 2018

Shares 78,124 Value ($000) $2,505 Avg Close $24.99 Range $18.66 - $33.67

Q4 2017

Shares 98,728 Value ($000) $1,938 Avg Close $18.21 Range $14.21 - $21.32

Q3 2017

Shares 78,378 Value ($000) $1,321 Avg Close $14.60 Range $10.88 - $20.42

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	36,784	$1,249	$35.13	$28.34 - $42.30
Q1 2018	78,124	$2,505	$24.99	$18.66 - $33.67
Q4 2017	98,728	$1,938	$18.21	$14.21 - $21.32
Q3 2017	78,378	$1,321	$14.60	$10.88 - $20.42