X0306 4 2020-08-06 0 0001731831 Eidos Therapeutics, Inc. EIDX 0001306344 Rohlen Douglas C/O EIDOS THERAPEUTICS, INC. 101 MONTGOMERY STREET, SUITE 2000 SAN FRANCISCO CA 94104 1 0 0 0 Restricted Stock Units 2020-08-06 4 A 0 4526 0.00 A Common Stock 4526 4526 D Stock Option (Right to Buy) 41.42 2020-08-06 4 A 0 21447 0.00 A 2030-08-05 Common Stock 21447 21447 D Each Restricted Stock Unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. The shares of Common Stock underlying the RSUs vest in three annual installments after the date of grant, subject to the Reporting Person's continued service on the Issuer's board of directors as of each vesting date. The stock option shall vest in three annual installments after the date of grant, subject to the Reporting Person's continued service on the Issuer's board of directors as of each vesting date. /s/ Franco Valle, as Attorney-in-Fact 2020-08-10