X0306 4 2020-06-05 0 0001746473 PLIANT THERAPEUTICS, INC. PLRX 0001401267 Huh Hoyoung C/O PLIANT THERAPEUTICS, INC. 260 LITTLEFIELD AVENUE SOUTH SAN FRANCISCO CA 94080 1 0 0 0 Common Stock 2020-06-05 4 C 0 139860 A 239619 I See footnote Series A Preferred Stock 2020-06-05 4 C 0 1000000 0.00 A Common Stock 139860 0 I See footnote The Series A Preferred Stock converted into Common Stock on a 7.15-for-one basis upon the closing of the Issuer's initial public offering without payment of consideration. The Series A Preferred Stock was convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial public offering. The Series A Preferred Stock had no expiration date. Shares held by pH Pharma Co., Ltd. ("pH Pharma"). The Reporting Person has a majority ownership in pH Pharma and also has voting power over the shares. The Reporting Person disclaims beneficial ownership of the shares held by pH Pharma, except to the extent of his proportionate pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose. /s/ Anthony Franks, attorney-in-fact 2020-06-09