0001213900-22-043431.txt : 20220801 0001213900-22-043431.hdr.sgml : 20220801 20220801163021 ACCESSION NUMBER: 0001213900-22-043431 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210729 FILED AS OF DATE: 20220801 DATE AS OF CHANGE: 20220801 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Westphal Susan CENTRAL INDEX KEY: 0001701731 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-33834 FILM NUMBER: 221125197 MAIL ADDRESS: STREET 1: C/O RUBICON TECHNOLOGY, INC. STREET 2: 900 EAST GREEN STREET, UNIT A CITY: BENSENVILLE STATE: IL ZIP: 60106 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Rubicon Technology, Inc. CENTRAL INDEX KEY: 0001410172 STANDARD INDUSTRIAL CLASSIFICATION: SEMICONDUCTORS & RELATED DEVICES [3674] IRS NUMBER: 364419301 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 900 EAST GREEN STREET CITY: BENSENVILLE STATE: IL ZIP: 60106 BUSINESS PHONE: (847) 295-7000 MAIL ADDRESS: STREET 1: 900 EAST GREEN STREET CITY: BENSENVILLE STATE: IL ZIP: 60106 4 1 ownership.xml OWNERSHIP DOCUMENT X0306 4 2021-07-29 0 0001410172 Rubicon Technology, Inc. RBCN 0001701731 Westphal Susan C/O RUBICON TECHNOLOGY, INC., 900 EAST GREEN ST., UNIT A BENSENVILLE IL 60106 1 0 0 0 Common Stock 2022-07-29 4 A 0 1010 0 A 8888 D /s/ Timothy Brog, Attorney in Fact 2022-08-01