0001437749-11-003399.txt : 20110518 0001437749-11-003399.hdr.sgml : 20110518 20110518141922 ACCESSION NUMBER: 0001437749-11-003399 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20110516 FILED AS OF DATE: 20110518 DATE AS OF CHANGE: 20110518 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: PDF SOLUTIONS INC CENTRAL INDEX KEY: 0001120914 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-COMPUTER PROGRAMMING SERVICES [7371] IRS NUMBER: 251701361 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 333 WEST SAN CARLOS STREET STREET 2: SUITE 700 CITY: SAN JOSE STATE: CA ZIP: 95110 BUSINESS PHONE: 4082807900 MAIL ADDRESS: STREET 1: 333 WEST SAN JOSE STREET STREET 2: SUITE 700 CITY: SAN JOSE STATE: CA ZIP: 95110 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: HARTGRING CORNELIS CENTRAL INDEX KEY: 0001233112 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-31311 FILM NUMBER: 11854499 MAIL ADDRESS: STREET 1: 333 WEST SAN CARLOS STREET STREET 2: SUITE 700 CITY: SAN JOSE STATE: CA ZIP: 95110 4 1 rdgdoc.xml PRIMARY DOCUMENT X0303 4 2011-05-16 0001120914 PDF SOLUTIONS INC PDFS 0001233112 HARTGRING CORNELIS 333 W. SAN CARLOS ST. SUITE 700 SAN JOSE CA 95110 1 Vice President, CSS Common Stock 2011-05-16 4 F 0 1073 6.24 D 49414 D This represents a disposition of shares to the company to satisfy tax withholding obligations with respect to the vesting of Restricted Stock Rights. This is not a sale of shares in the market. Includes 1,895 shares of common stock that were purchased on July 31, 2010 and 9,475 shares of common stock that were purchased on January 31, 2011 under the PDFS Employee Stock Purchase Plan. /s/ Joy E. Leo, Attorney-in-Fact for Cornelis Hartgring 2011-05-18