NORTHWEST PIPE CO

Ticker: NWPX CUSIP: 667746101 Class: Common Stock

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's Holding History (CIK: 0001164508)

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

Q1 2020

Shares 10,143 Value ($000) $226 Avg Close $30.50 Range $18.52 - $36.70

Q3 2019

Shares 8,341 Value ($000) $235 Avg Close $25.44 Range $18.04 - $28.93

Q2 2019

Shares 11,826 Value ($000) $305 Avg Close $24.80 Range $22.08 - $26.48

Q1 2019

Shares 8,700 Value ($000) $209 Avg Close $23.71 Range $21.02 - $25.98

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2020	10,143	$226	$30.50	$18.52 - $36.70
Q3 2019	8,341	$235	$25.44	$18.04 - $28.93
Q2 2019	11,826	$305	$24.80	$22.08 - $26.48
Q1 2019	8,700	$209	$23.71	$21.02 - $25.98