PATTERSON UTI ENERGY INC

Ticker: PTEN CUSIP: 703481101 Class: Common Stock

AZZAD ASSET MANAGEMENT INC /ADV's Holding History (CIK: 0001121914)

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

Q1 2012
Shares 13,781 Value ($000) $238 Avg Close — Range —
Q2 2011
Shares 8,918 Value ($000) $282 Avg Close — Range —
Q1 2011
Shares 8,901 Value ($000) $262 Avg Close — Range —