0001104659-21-088946.txt : 20210702 0001104659-21-088946.hdr.sgml : 20210702 20210702165734 ACCESSION NUMBER: 0001104659-21-088946 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210701 FILED AS OF DATE: 20210702 DATE AS OF CHANGE: 20210702 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Zhang Shuo CENTRAL INDEX KEY: 0001782026 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-31311 FILM NUMBER: 211071061 MAIL ADDRESS: STREET 1: PDF SOLUTIONS, INC. STREET 2: 2858 DE LA CRUZ BOULEVARD CITY: SANTA CLARA STATE: CA ZIP: 95050 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: PDF SOLUTIONS INC CENTRAL INDEX KEY: 0001120914 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-PREPACKAGED SOFTWARE [7372] IRS NUMBER: 251701361 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 2858 DE LA CRUZ BOULEVARD CITY: SANTA CLARA STATE: CA ZIP: 95050 BUSINESS PHONE: 4082807900 MAIL ADDRESS: STREET 1: 2858 DE LA CRUZ BOULEVARD CITY: SANTA CLARA STATE: CA ZIP: 95050 4 1 tm2121343-3_4seq1.xml OWNERSHIP DOCUMENT X0306 4 2021-07-01 0 0001120914 PDF SOLUTIONS INC PDFS 0001782026 Zhang Shuo 2858 DE LA CRUZ BLVD SANTA CLARA CA 95050 1 0 0 0 Common Stock 2021-07-01 4 A 0 4688 A 21379 D These shares represent an award of restricted stock units granted under the Company's Director Compensation Program (Total Shares). 25% of the Total Shares vested on July 1, 2021, the Vesting Start Date, and 25% of the Total Shares shall vest on each anniversary of the Vesting Start Date thereafter until fully vested, subject to the recipient's continued service through each applicable vesting date. /s/Kimon Michaels, Attorney-In-Fact for Shuo Zhang 2021-07-02