PDF SOLUTIONS INC

CUSIP: 69328210 Class: COM

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

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

Q1 2016
Shares 10,753 Value ($000) $144 Avg Close — Range —
Q4 2015
Shares 257,100 Value ($000) $2,787 Avg Close — Range —
Q3 2015
Shares 228,958 Value ($000) $3,663 Avg Close — Range —
Q2 2015
Shares 228,958 Value ($000) $3,663 Avg Close — Range —
Q1 2015
Shares 141,171 Value ($000) $2,530 Avg Close — Range —
Q4 2014
Shares 84,576 Value ($000) $1,257 Avg Close — Range —
Q3 2014
Shares 63,098 Value ($000) $796 Avg Close — Range —
Q2 2014
Shares 65,896 Value ($000) $1,398 Avg Close — Range —
Q1 2014
Shares 158,969 Value ($000) $2,888 Avg Close — Range —
Q4 2013
Shares 26,362 Value ($000) $675 Avg Close — Range —
Q3 2013
Shares 8,165 Value ($000) $174 Avg Close — Range —