X0407 4 2023-06-07 0 0000921299 FIBROGEN INC FGEN 0001778430 Blaug Suzanne C/O FIBROGEN, INC. 409 ILLINOIS ST. SAN FRANCISCO CA 94158 1 0 0 0 1 Common Stock 2023-06-07 4 A 0 8289 0.00 A 38114 D Common Stock 2023-06-09 4 S 0 3351 16.73 D 34763 D Common Stock 2023-06-09 4 S 0 5169 17.51 D 29594 D Stock Option (Right to Buy) 17.13 2023-06-07 4 A 0 12666 0.00 A 2033-06-06 Common Stock 12666 12666 D Represents the grant of restricted stock units that vest on the earlier of June 7, 2024 or the date of the next annual meeting of stockholders, subject to the reporting person's continuous service on the applicable vesting date. Represents the number of shares sold by the reporting person (pursuant to a 10b5-1 trading plan dated March 8, 2023) to cover the tax obligation realized upon the vesting of restricted stock units previously reported in Table I. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $16.15 to $17.13. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Price reported is a weighted-average sales price. The shares were sold at prices ranging from $17.26 to $17.72. The Reporting Person will provide upon request to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price. Options vest on the earlier of June 7, 2024 or the date of the next annual meeting of stockholders, subject to the reporting person's continuous service on the applicable vesting date. /s/ Cecelia Monoarfa-Taime, Attorney-in-fact 2023-06-09