0001209191-21-034207.txt : 20210519 0001209191-21-034207.hdr.sgml : 20210519 20210519191723 ACCESSION NUMBER: 0001209191-21-034207 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210517 FILED AS OF DATE: 20210519 DATE AS OF CHANGE: 20210519 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Day David CENTRAL INDEX KEY: 0001523288 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36384 FILM NUMBER: 21941889 MAIL ADDRESS: STREET 1: 21700 OXNARD STREET STREET 2: SUITE 1600 CITY: WOODLAND HILLS STATE: CA ZIP: 91367 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: 12181 BLUFF CREEK DRIVE, 4TH FLOOR CITY: LOS ANGELES STATE: CA ZIP: 90094 BUSINESS PHONE: 310-207-0272 MAIL ADDRESS: STREET 1: 12181 BLUFF CREEK DRIVE, 4TH FLOOR CITY: LOS ANGELES STATE: CA ZIP: 90094 FORMER COMPANY: FORMER CONFORMED NAME: RUBICON PROJECT, INC. DATE OF NAME CHANGE: 20140106 4 1 doc4.xml FORM 4 SUBMISSION X0306 4 2021-05-17 0 0001595974 MAGNITE, INC. MGNI 0001523288 Day David C/O MAGNITE, INC. 6080 CENTER DRIVE, 4TH FLOOR LOS ANGELES CA 90045 0 1 0 0 Chief Financial Officer Common Stock 2021-05-17 4 S 0 35569 25.98 D 273526 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 2021-05-19