Investor Presentaiton

Commercial excellence begins with a world-class field team Key Account Team Research & Collaborations Managed Care Client Services Unified CRM Platform Field Sales Account Level Integration Medical Affairs Marketing INVESTOR 20 DAY 23 Genomic Specialists lili p MIX Remote Share of Voice1 #1 Share Share of Voice1 #1 #1 Rated Field Team1 #1 Support¹ Rated #1 In-Person GUARDANT 1. Guardant360 Brand Tracker Q2 2023; 250+ team rated first in customer satisfaction by HCPs for past 7 quarters; 50% more oncology interactions compared to closest CGP company. *Growth is ordering oncologists/quarter 84

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