Brian Gephart - 15 Feb 2026 Form 4 Insider Report for MAGNITE, INC. (MGNI)

Role: CHIEF ACCOUNTING OFFICER
Signature: /s/ Aaron Saltz, attorney-in-fact
Issuer symbol: MGNI
Transactions as of: 15 Feb 2026
Net transactions value: -$71,943
Form type: 4
Filing time: 18 Feb 2026, 16:30:24 UTC
Previous filing: 05 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Gephart Brian	CHIEF ACCOUNTING OFFICER	C/O MAGNITE, INC., 1250 BROADWAY, 9TH FLOOR, NEW YORK	/s/ Aaron Saltz, attorney-in-fact	18 Feb 2026	0001778484

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MGNI	Common Stock	Tax liability	$71,943	-6,149	-4.8%	$11.70	122,385	15 Feb 2026	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Represents the non-discretionary forfeiture of shares on behalf of the Reporting Person pursuant to an arrangement mandated by the Issuer to cover the tax withholding obligations associated with the vesting of restricted stock units.