PDF SOLUTIONS INC — Director's Dealing 2012

Feb 25, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PDF SOLUTIONS INC (PDFS)
CIK: 0001120914
Period of Report: 2012-02-23

Reporting Person: Yu Albert YC (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-23	Common stock	M	3500	$4.82	Acquired	17974	Direct
2012-02-23	Common Stock	M	1749	$4.82	Acquired	19723	Direct
2012-02-23	Common Stock	M	1406	$2.30	Acquired	21129	Direct
2013-02-23	Common Stock	S	3500	$6.80	Disposed	17629	Direct
2012-02-23	Common Stock	S	1749	$6.75	Disposed	15880	Direct
2012-02-23	Common Stock	S	1406	$6.70	Disposed	14474	Direct
2012-02-24	Common Stock	M	3500	$4.82	Acquired	17974	Direct
2012-02-24	Common Stock	S	3500	$7	Disposed	14474	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-23	Stock Options (Right to Buy)	$4.82	M	3500	Acquired	2020-05-17	Common Stock (3500)	Direct
2012-02-23	Stock Options (Right to Buy)	$4.82	M	1749	Acquired	2020-05-17	Common Stock (1749)	Direct
2012-02-24	Stock Options (Right to Buy)	$4.82	M	3500	Acquired	2020-05-17	Common Stock (3500)	Direct
2012-02-23	Stock Options (Right to buy)	$2.30	M	1406	Acquired	2019-07-30	Common Stock (1406)	Direct

Footnotes

F1: The correct amount of the securities beneficially owned was 14,474, which was inadvertently omitted from 11/16/2011 Form 4 filings.