PATTERSON UTI ENERGY INC

Ticker: PTEN CUSIP: 703481101 Class: Common Stock

Dorsey & Whitney Trust CO LLC's Holding History (CIK: 0001384042)

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

Q4 2016

Shares 7,957 Value ($000) $214 Avg Close $24.70 Range $20.79 - $29.56

Q3 2016

Shares 9,498 Value ($000) $212 Avg Close $20.07 Range $17.61 - $22.66

Q2 2016

Shares 9,498 Value ($000) $202 Avg Close $18.84 Range $16.06 - $22.12

Q1 2016

Shares 11,693 Value ($000) $206 Avg Close $14.91 Range $10.94 - $18.75

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2016	7,957	$214	$24.70	$20.79 - $29.56
Q3 2016	9,498	$212	$20.07	$17.61 - $22.66
Q2 2016	9,498	$202	$18.84	$16.06 - $22.12
Q1 2016	11,693	$206	$14.91	$10.94 - $18.75