X0306 4 2019-11-20 0 0001731831 Eidos Therapeutics, Inc. EIDX 0001758363 Turtle Cameron C/O EIDOS THERAPEUTICS, INC. 101 MONTGOMERY STREET, SUITE 2000 SAN FRANCISCO CA 94104 0 1 0 0 Chief Business Officer Common Stock 2019-11-20 4 S 0 7468 55.5443 D 87687 D Common Stock 2019-11-20 4 S 0 2532 56.3574 D 85155 D Represents the weighted average sale price of the shares sold ranging from $55.00 to $55.99 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. Represents the weighted average sale price of the shares sold ranging from $56.00 to $56.88 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. /s/ Franco Valle, as Attorney-in-Fact 2019-11-22