PDF SOLUTIONS INC

Ticker: PDFS CUSIP: 693282105 Class: Common Stock

BRIDGEWAY CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001107261)

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

Q4 2019

Shares 30,500 Value ($000) $515 Avg Close $15.34 Range $12.53 - $17.42

Q4 2018

Shares 45,000 Value ($000) $379 Avg Close $8.48 Range $7.56 - $9.45

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2019	30,500	$515	$15.34	$12.53 - $17.42
Q4 2018	45,000	$379	$8.48	$7.56 - $9.45