0001415889-25-019025.txt : 20250702 0001415889-25-019025.hdr.sgml : 20250702 20250702161543 ACCESSION NUMBER: 0001415889-25-019025 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20250630 FILED AS OF DATE: 20250702 DATE AS OF CHANGE: 20250702 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Evans Katie Seitz CENTRAL INDEX KEY: 0001700262 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36384 FILM NUMBER: 251101241 MAIL ADDRESS: STREET 1: C/O TREMOR VIDEO, INC. STREET 2: 1501 BROADWAY, SUITE 801 CITY: NEW YORK STATE: NY ZIP: 10036 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MAGNITE, INC. CENTRAL INDEX KEY: 0001595974 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370] ORGANIZATION NAME: 06 Technology EIN: 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 form4-07022025_040735.xml X0508 4 2025-06-30 0001595974 MAGNITE, INC. MGNI 0001700262 Evans Katie Seitz C/O MAGNITE, INC. 1250 BROADWAY, 15TH FLOOR NEW YORK NY 10001 false true false false President, Operations 1 Common Stock 2025-06-30 4 M 0 16137 3.61 A 458925 D Common Stock 2025-06-30 4 S 0 8358 22 D 450567 D Common Stock 2025-06-30 4 S 0 16137 24 D 434430 D Stock Option (Right to Buy) 3.61 2025-06-30 4 M 0 16137 0 D 2028-02-26 Common Stock 16137 0 D This exercise and subsequent sales were made pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 6, 2025. 25% of the total number of shares underlying this option vested on February 14, 2019 and the remaining shares vested 1/36 per month over the next 36 months thereafter. Granted as compensation for services. /s/ Aaron Saltz, attorney-in-fact 2025-07-02