PATTERSON UTI ENERGY INC

Ticker: PTEN CUSIP: 703481101 Class: Common Stock

RATIONAL ADVISORS LLC's Holding History (CIK: 0001143565)

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

Q4 2013
Shares 4,330 Value ($000) $110 Avg Close $23.93 Range $21.29 - $26.09
Q3 2013
Shares 4,690 Value ($000) $100 Avg Close $20.54 Range $18.83 - $22.41
Q2 2013
Shares 4,795 Value ($000) $93 Avg Close $21.83 Range $18.96 - $25.12
Q1 2013
Shares 7,575 Value ($000) $181 Avg Close $22.12 Range $18.59 - $25.48
Q1 2010
Shares 51,800 Value ($000) $724 Avg Close — Range —
Q2 2009
Shares 38,900 Value ($000) $500 Avg Close — Range —