0001209191-23-046554.txt : 20230818 0001209191-23-046554.hdr.sgml : 20230818 20230818163133 ACCESSION NUMBER: 0001209191-23-046554 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230816 FILED AS OF DATE: 20230818 DATE AS OF CHANGE: 20230818 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: BARRETT MICHAEL G. CENTRAL INDEX KEY: 0001100612 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36384 FILM NUMBER: 231186248 BUSINESS ADDRESS: BUSINESS PHONE: 310-207-0272 MAIL ADDRESS: STREET 1: C/O THE RUBICON PROJECT, INC. STREET 2: 12181 BLUFF CREEK DRIVE, 4TH FLOOR CITY: PLAYA VISTA STATE: CA ZIP: 90094 FORMER NAME: FORMER CONFORMED NAME: BARRETT MICHAEL DATE OF NAME CHANGE: 19991207 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MAGNITE, INC. CENTRAL INDEX KEY: 0001595974 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370] IRS NUMBER: 208881738 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 1250 BROADWAY STREET 2: 15TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10001 BUSINESS PHONE: 212-243-2769 MAIL ADDRESS: STREET 1: 1250 BROADWAY STREET 2: 15TH FLOOR CITY: NEW YORK STATE: NY ZIP: 10001 FORMER COMPANY: FORMER CONFORMED NAME: RUBICON PROJECT, INC. DATE OF NAME CHANGE: 20140106 4 1 doc4.xml FORM 4 SUBMISSION X0508 4 2023-08-16 0 0001595974 MAGNITE, INC. MGNI 0001100612 BARRETT MICHAEL G. C/O MAGNITE, INC. 1250 BROADWAY,15TH FLOOR NEW YORK NY 10001 1 1 0 0 CEO 0 Common Stock 2023-08-16 4 S 0 35869 8.31 D 1294203 D Represents the non-discretionary sale of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units. /s/ Aaron Saltz, attorney-in-fact 2023-08-18