X0306 4 2020-06-03 0 0001731831 Eidos Therapeutics, Inc. EIDX 0001655016 Fox Jonathan C C/O EIDOS THERAPEUTICS, INC. 101 MONTGOMERY STREET, SUITE 2000 SAN FRANCISCO CA 94104 0 1 0 0 See Remarks Common Stock 2020-05-31 5 A 0 E 444 41.5735 A 3294 D Common Stock 2020-06-01 5 G 0 E 1020 0.00 D 397605 I See footnote Common Stock 2020-06-02 5 G 0 E 1020 0.00 D 396585 I See footnote Common Stock 2020-06-03 4 S 0 5000 50.00 D 391585 I See footnote Shares acquired pursuant to the Issuer's 2018 Employee Stock Purchase Plan. The shares are held by Jonathan C. Fox and Suzanne Markel-Fox, Co-Trustees of the Fox Family Trust Dated 17 Dec 2014. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 2, 2020. President and Chief Medical Officer /s/ Franco Valle, as Attorney-in-Fact 2020-06-05