OIL STS INTL INC

Ticker: OIS CUSIP: 678026105 Class: Common Stock

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

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

Q2 2019

Shares 637,765 Value ($000) $11,671 Avg Close $17.92 Range $15.79 - $21.27

Q1 2019

Shares 671,440 Value ($000) $11,388 Avg Close $16.91 Range $13.78 - $18.86

Q4 2018

Shares 583,140 Value ($000) $8,327 Avg Close $23.01 Range $13.20 - $34.66

Q3 2018

Shares 506,800 Value ($000) $16,826 Avg Close $32.65 Range $29.30 - $37.39

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2019	637,765	$11,671	$17.92	$15.79 - $21.27
Q1 2019	671,440	$11,388	$16.91	$13.78 - $18.86
Q4 2018	583,140	$8,327	$23.01	$13.20 - $34.66
Q3 2018	506,800	$16,826	$32.65	$29.30 - $37.39