0001415889-25-016038.txt : 20250606 0001415889-25-016038.hdr.sgml : 20250606 20250606175900 ACCESSION NUMBER: 0001415889-25-016038 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20250605 FILED AS OF DATE: 20250606 DATE AS OF CHANGE: 20250606 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: 251032312 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 form4-06062025_090652.xml X0508 4 2025-06-05 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 2025-06-05 4 M 0 20000 3.61 A 477788 D Common Stock 2025-06-05 4 S 0 35000 17.36 D 442788 D Stock Option (Right to Buy) 3.61 2025-06-05 4 M 0 20000 0 D 2028-02-26 Common Stock 20000 36137 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.83 to $17.60 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4. 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 2025-06-06