X0306 4 2019-12-18 0 0001731831 Eidos Therapeutics, Inc. EIDX 0001742587 Sinha Uma C/O EIDOS THERAPEUTICS, INC. 101 MONTGOMERY STREET, SUITE 2000 SAN FRANCISCO CA 94104 1 1 0 0 Chief Scientific Officer Common Stock 2019-12-18 4 S 0 9973 61.6144 D 333608 D Common Stock 2019-12-18 4 S 0 825 62.4879 D 332783 D Common Stock 2019-12-18 4 S 0 1702 63.3141 D 331081 D Represents the weighted average sale price of the shares sold from $61.085 to $62.075 per share. The Reporting Person will provide, upon request by the Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price for all sales reported in footnotes 1 through 3. Represents the weighted average sale price of the shares sold from $62.08 to $63.075 per share Represents the weighted average sale price of the shares sold from $63.10 to $63.785 per share. /s/ Franco Vallue, Attorney-in-Fact 2019-12-20