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

Role: CHIEF TECHNOLOGY OFFICER
Signature: /s/ Aaron Saltz, attorney-in-fact
Issuer symbol: MGNI
Transactions as of: 18 Aug 2025
Net transactions value: -$186,841
Form type: 4
Filing time: 20 Aug 2025, 16:30:18 UTC
Previous filing: 02 Jul 2025
Next filing: 04 Sep 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Buonasera David	CHIEF TECHNOLOGY OFFICER	C/O MAGNITE, INC., 1250 BROADWAY, 15TH FLOOR, NEW YORK	/s/ Aaron Saltz, attorney-in-fact	20 Aug 2025	0001966857

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MGNI	Common Stock	Sale	$186,841	-7,834	-3.1%	$23.85	241,579	18 Aug 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.