Magnite Investor Presentation — August 2020

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CONFIDENTIAL | © MA GNITE

CONFIDENTIAL | © MA GNITE

Financial Highlights

A ugus t 10 , 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 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, including, without limita tion, r e v enue, adv ertising spend, pr ofitability , ne t loss, loss per

shar e, and cash flo w; 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 f ocus on header bidding,

connec t ed t ele vision ("C TV"), mobile, video, 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