0001595974-21-000018.txt : 20210326 0001595974-21-000018.hdr.sgml : 20210326 20210326194148 ACCESSION NUMBER: 0001595974-21-000018 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210325 FILED AS OF DATE: 20210326 DATE AS OF CHANGE: 20210326 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: 21779118 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 wf-form4_161680209176844.xml FORM 4 X0306 4 2021-03-25 0 0001595974 MAGNITE, INC. MGNI 0001523288 Day David C/O MAGNITE, INC. 12181 BLUFF CREEK DRIVE, 4TH FLOOR PLAYA VISTA CA 90094 0 1 0 0 CFO Common Stock 2021-03-25 4 M 0 10454 1.97 A 287789 D Common Stock 2021-03-25 4 S 0 10454 39.74 D 277335 D Employee Stock Option (Right to Buy) 1.97 2021-03-25 4 M 0 10454 0 D 2028-03-15 Common Stock 10454.0 9584 D The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan. 25% of the stock options vested on February 1, 2019 and the remaining option shares have vested or will vest in 36 equal installments each calendar month thereafter. Granted as compensation for services. /s/ Aaron Saltz, attorney in fact 2021-03-26