BioAtla Investor Presentation Deck

BA3011 ADC Concentration vs Time Profiles from Different Dosing Regimens bicatla Cmax = SAFETY 50.00 20.00 10.00 5.00 2.00 1.00 0.50 0.20 0.10 0.05 Cmin & Frequency = EFFICACY 0 7 14 21 28 35 Median 1.8 mg/kg Q2W Median 1.8 mg/kg 2Q3W Median 1.2 mg/kg 3Q4W (1.8 mg/kg Starting Dose) 42 49 56 Nominal Time Since First Dose (days) ADC = antibody-drug conjugate; 2QW = every two weeks; 2Q3W = twice every 3 weeks; 3Q4W = three times every 4 weeks Cmax: maximum concentration, Cmin: minimum concentration 63 70 77 BioAtla| Overview 44

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