0001213900-22-043432.txt : 20220801 0001213900-22-043432.hdr.sgml : 20220801 20220801163056 ACCESSION NUMBER: 0001213900-22-043432 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20220729 FILED AS OF DATE: 20220801 DATE AS OF CHANGE: 20220801 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Gramm Jefferson CENTRAL INDEX KEY: 0001427290 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-33834 FILM NUMBER: 221125220 MAIL ADDRESS: STREET 1: C/O BANDERA PARTNERS LLC STREET 2: 50 BROAD STREET, SUITE 1820 CITY: NEW YORK STATE: NY ZIP: 10004 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 2022-07-29 0 0001410172 Rubicon Technology, Inc. RBCN 0001427290 Gramm Jefferson C/O RUBICON TECHNOLOGY, INC., 900 EAST GREEN ST., UNIT A BENSENVILLE IL 60106 1 0 1 0 Common Stock 2022-07-29 4 A 0 1010 0 A 5454 D Common Stock 258256 I See footnote Consists of securities directly held by Bandera Master Fund L.P. ("Bandera Master Fund"). Bandera Master Fund has delegated to Bandera Partners LLC ("Bandera Partners"), its investment manager, the sole and exclusive authority to vote and dispose of the securities held by Bandera Master Fund. Mr. Gramm, solely by virtue of his position as a Managing Partner, Managing Director and Portfolio Manager of Bandera Partners, may be deemed to beneficially own the securities held by Bandera Master Fund. Mr. Gramm expressly disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein. /s/ Timothy Brog, Attorney in Fact 2022-08-01