PDF SOLUTIONS INC — Director's Dealing 2007

May 31, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PDF SOLUTIONS INC (PDFS)
CIK: 0001120914
Period of Report: 2007-05-30

Reporting Person: Caulfield Thomas (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-05-30	2001 Stock Plan Option (right to buy)	$10.43	A	15000	Acquired	2017-05-29	Common Stock (15000)	Direct

Footnotes

F1: 12/48ths of the total shares subject to the option (the "Total Shares") vest on May 30, 2008 and 1/48th of the Total Shares shall vest on the 30th day of each month thereafter, provided that the reporting person continues to serve as a Director of PDFS.