WEST CORP

CUSIP: 95235520 Class: COM

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

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

Q1 2015
Shares 45,390 Value ($000) $1,531 Avg Close — Range —
Q4 2014
Shares 50,204 Value ($000) $1,657 Avg Close — Range —
Q3 2014
Shares 54,917 Value ($000) $1,618 Avg Close — Range —
Q2 2014
Shares 20,268 Value ($000) $543 Avg Close — Range —
Q4 2013
Shares 33,523 Value ($000) $862 Avg Close — Range —