X0306 4 2021-05-14 0 0001584751 Talis Biomedical Corp TLIS 0001337801 Scott Randal W. C/O TALIS BIOMEDICAL CORPORATION 230 CONSTITUTION DRIVE MENLO PARK CA 94025 1 0 0 0 Common stock 2021-05-14 4 P 0 9000 10.16 A 9000 D Common stock 2021-05-17 4 P 0 11000 10.11 A 20000 D Common stock 1390065 I By Thinking Bench Capital, LLC Common stock 312500 I By OG Family Trust, u/d/t May 30, 2014 This purchase was executed in multiple purchases at prices ranging from $10.03 to $10.25. The price reported above reflects the weighted average price. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares and prices at which the transaction was effected. This purchase was executed in multiple purchases at prices ranging from $10.00 to $10.15. The price reported above reflects the weighted average price. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares and prices at which the transaction was effected. /s/ Karen E. Flick, Attorney-in-Fact for Randal W. Scott 2021-05-18