TBD = Impact on Ad Targeting… Digital TV-Based Ads (Aided by In-Hand Mobiles) Multi-Platform Data Improves Relevancy… …Creating Opportunities for Better Ad Experiences Xandr Revenue vs. Growth Y/Y $600MM 60% ) ) ars B ne ue Li l B ( Red Nielsen Audience Report (USA) ue$300MM 30% ( en th ow Rev r G 88% = Use a Second Digital Device dr /Y While Watching TV an Y X 71% = Look Up Content Related To Content They Are Watching 41% = Message Friends / Family About $0 0% Content They Are Watching Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 2017 2018 2019 Source: AT&T / Xandr Releases. Nielsen Q2:18 Total Audience Report (12/18). Note: Survey based on Nielsen National USA Panel data. Note: 2018 USA Mid-term elections drove above-average television advertising spend on Xandr platform. Internet Trends 38 2019