PDF SOLUTIONS INC — Director's Dealing 2013

May 2, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PDF SOLUTIONS INC (PDFS)
CIK: 0001120914
Period of Report: 2013-04-30

Reporting Person: WALKER GREGORY C (CFO, VP Finance)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-04-30	Common Stock	S	2688	$17.049	Disposed	0	Direct

Footnotes

F1: Consists of 2,688 shares of common stock that were previously purchased on January 31, 2013 under PDFS Employee Stock Purchase Program.

F2: Average weighted sale price for shares disposed of in the reported transaction. The shares were sold in multiple brokers' transactions at various market prices per share ranging from $17.08 to $17.04.