Magnite (MGNI) investor relations material

Executive summary

• Annual meeting scheduled for June 8, 2026, to be held virtually via live webcast.

• Proxy materials, including the notice of meeting, proxy statement, and annual report, are available online for review prior to voting.

Voting matters and shareholder proposals

• Election of three Class III directors: Paul Caine, Doug Knopper, and David Pearson.

• Ratification of Deloitte & Touche LLP as the independent registered public accounting firm for the current fiscal year.

• Advisory vote on executive compensation (say-on-pay).

• Advisory vote on the frequency of future say-on-pay votes, with the board recommending a 1-year interval.

• Board recommends voting "FOR" all director nominees, "FOR" ratification of the auditor, "FOR" say-on-pay, and "1 YEAR" for say-on-pay frequency.

Board of directors and corporate governance

• Board recommends the election of three Class III directors at the annual meeting.