PDF SOLUTIONS INC

Ticker: PDFS CUSIP: 693282105 Class: Common Stock

OAK ASSOCIATES LTD /OH/'s Holding History (CIK: 0000836372)

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

Q2 2016

Shares 27,330 Value ($000) $382 Avg Close $13.59 Range $12.09 - $15.25

Q1 2016

Shares 27,330 Value ($000) $366 Avg Close $10.95 Range $8.70 - $14.73

Q4 2015

Shares 27,330 Value ($000) $296 Avg Close $10.84 Range $9.68 - $11.76

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2016	27,330	$382	$13.59	$12.09 - $15.25
Q1 2016	27,330	$366	$10.95	$8.70 - $14.73
Q4 2015	27,330	$296	$10.84	$9.68 - $11.76