Magnite Investor Presentation — November 2020

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CONFIDENTIAL | © MA GNITE

CONFIDENTIAL | © MA GNITE

Financial Highlights

No v ember 9, 2 0 2 0 CONFIDENTIAL | © MA GNITE

CONFIDENTIAL | © MA GNITE

FOR W ARD-L OOKING S T A TEMENT S

This pr esenta tion and manag ement's pr epar ed r emark s during the conf er ence call r ef err ed t o abo v e include, and manag ement's ans w ers t o ques tions during the conf er ence call ma y include, f orw ar d-looking s ta t ements, including

s ta t ements based upon or r ela ting t o our e xpec ta tions, assump tions, es tima t es, and pr ojec tions. In some cases, y ou can identify f orw ar d-looking s ta t ements b y t erms such as "ma y ," "might ," "will," " objec tiv e," "int end," "should," " could," " can,"

"w ould," " e xpec t ," "belie v e," " design," "anticipa t e," " es tima t e," "pr edic t ," "po t ential," "plan " or the ne ga tiv e of these t erms, and similar e xpr essions. F orw ar d-looking s ta t ements ma y include, but ar e no t limit ed t o, s ta t ements concerning the

po t ential impac ts of the CO VID-19 pandemic on our business opera tions, financial condition, and r esults of opera tions and on the w orld econom y; our anticipa t ed financial perf ormance, anticipa t ed benefits or eff ec ts r ela t ed t o the

consumma tion of the Mer g er with T elaria, including es tima t ed s yner gies and cos t sa vings r esulting fr om the Mer g er; s tra t e gic objec tiv es, including our f ocus on connec t ed t ele vision ("C TV"), mobile, video, header bidding, Demand Manag er ,

identity solutions and priv a t e mark e tplace opportunities; in v es tments in our business; de v elopment of our t echnolo gy; indus try gr o wth ra t es f or ad-support ed C TV and the shift in video consump tion fr om linear TV t o C TV; intr oduc tion of

ne w off erings; the impac t of transpar ency initia tiv es w e ma y undertak e; the impac t of our traffic shaping t echnolo gy on our business; the eff ec ts of our cos t r educ tion initia tiv es; scope and dura tion of client r ela tionships; the f ees w e ma y

char g e in the futur e; business mix and e xpansion of our C TV , mobile, video and priv a t e mark e tplace off erings; sales gr o wth; client utiliza tion of our off erings; our compe titiv e diff er entia tion; our mark e t shar e and leadership position in the

indus try; mark e t conditions, tr ends, and opportunities; user r each; certain s ta t ements r e gar ding futur e opera tional perf ormance measur es including ad r eques ts, fill ra t e, paid impr essions, a v erag e CPM, tak e ra t e, and adv ertising spend;

benefits fr om supply pa th op timiza tion; and o ther s ta t ements tha t ar e no t his t orical f ac ts. These s ta t ements ar e no t guarant ees of futur e perf ormance; the y r eflec t our curr ent vie ws with r espec t t o futur e e v ents and ar e based on