Sotheby's Investor Presentation Deck

SOTHEBY'S DIGITAL DEVELOPMENT TIMELINE 2018 Investor Briefing: April 2019 Mobile bidding successfully piloted New Sotheby's Wine e-commerce site Sales increase • Template for future retail initiatives Search Engine Marketing • Google ad 'quality score' increase • Lowering advertising costs as content is more prominent in search results organically 23 Dedicated Consignment Landing Pages • Improved conversion rate to successful property submission Identity access management system Auth0 platform increases security and privacy ● Enhancement of auction calendar with series of online-only summer sales Sotheby's

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