X0407 4 2023-06-02 0 0001674930 Fulgent Genetics, Inc. FLGT 0001819718 Xie Jian C/O FULGENT GENETICS, INC. 4399 SANTA ANITA AVENUE EL MONTE CA 91731 0 1 0 0 President and COO 0 Common Stock 2023-06-02 4 S 0 1433 40.2961 D 425794 D Common Stock 220816 I By Trust The shares were sold from the reporting person to satisfy the tax withholding obligations that arose upon the vesting of certain restricted stock units granted to the reporting person on February 28, 2022, which grants were originally reported on Form 4 filed with the U.S. Securities and Exchange Commission on March 2, 2022. The shares were sold in multiple transactions at prices ranging from $39.79 to $40.75, inclusive. The reported price reflects the weighted-average sale price. The reporting person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the transactions were effected. Securities held by The Hsieh Family Dynasty Trust, dated January 27, 2010 (the "Trust"). Mr. Xie serves on the investment committee of the Trust. Mr. Xie disclaims any beneficial interest except with respect to any pecuniary interest therein. /s/ Paul Kim as Attorney-in-Fact 2023-06-06