HELMERICH & PAYNE INC

Ticker: HP CUSIP: 423452101 Class: COM

VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.'s Holding History (CIK: 0001021642)

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

Q4 2013

Shares 120,379 Value ($000) $10,121 Avg Close $77.83 Range $68.87 - $84.87

Q3 2013

Shares 112,079 Value ($000) $7,729 Avg Close $66.00 Range $62.35 - $71.36

Q2 2013

Shares 186,304 Value ($000) $11,635 Avg Close $61.57 Range $55.78 - $66.02

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2013	120,379	$10,121	$77.83	$68.87 - $84.87
Q3 2013	112,079	$7,729	$66.00	$62.35 - $71.36
Q2 2013	186,304	$11,635	$61.57	$55.78 - $66.02