David Day - Aug 18, 2025 Form 4 Insider Report for MAGNITE, INC. (MGNI)

Role: CHIEF FINANCIAL OFFICER
Signature: /s/ Aaron Saltz, attorney-in-fact
Stock symbol: MGNI
Transactions as of: Aug 18, 2025
Transactions value $: -$318,779
Form type: 4
Date filed: 8/20/2025, 04:30 PM
Previous filing: Aug 19, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Day David	CHIEF FINANCIAL OFFICER	C/O MAGNITE, INC., 1250 BROADWAY, 15TH FLOOR, NEW YORK	/s/ Aaron Saltz, attorney-in-fact	2025-08-20	0001523288

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MGNI	Common Stock	Sale	-$319K	-13.4K	-3.38%	$23.85	382K	Aug 18, 2025	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These shares were sold to cover the Reporting Person's tax obligation resulting from the settlement of vested Restricted Stock Units. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by sell to cover transactions and does not represent a discretionary transaction by the Reporting Person.