Offer Letter, by and between FibroGen, Inc. and Thane Wettig, dated as of May 7, 2020

Compensation. FibroGen will pay you a starting annual salary of $500,000, payable in semi-monthly installments on our regular paydays in accordance with FibroGen's standard payroll policies. Your salary will begin as of the Effective Date. The position is classified as exempt and therefore not eligible for overtime pay. The first and last payment by FibroGen to you will be adjusted, if necessary, to reflect a commencement or termination date other than the first or last working day of a pay period.

Signing Bonus. FibroGen will pay you a sign-on bonus in the amount of $150,000 (subject to applicable payroll taxes and withholdings) paid out after you have completed 60 days of employment.

Stock Options and Restricted Stock Units. Pending approval by the FibroGen Compensation Committee, you will be granted the following equity incentive grant(s) pursuant to the terms and conditions of the Equity Plan effective on the date of acceptance of this letter (the “Equity Plan”), as may be amended or modified from time to time:

a stock option to purchase 90,000 shares of FibroGen's Common Stock with an exercise price set at the fair market value on the date of grant (“Stock Options”); and

a grant of 30,000 restricted stock units relating to shares of FibroGen’s Common Stock (“RSUs”).

Bonus Plan. You will be eligible to participate in FibroGen’s Incentive Compensation Plan (the “Bonus Plan”) adopted by FibroGen for its employees on such terms as FibroGen's Board of Directors (the "Board") may determine in its discretion.

Relocation. FibroGen will offer you Relocation assistance in the amount of $75,000 (subject to applicable payroll taxes and withholdings) once you acknowledge the services being provided to you via our third-party vendor NuCompass.

Benefits. During the term of your employment, you will be eligible to participate in FibroGen’s benefits program, which may include FibroGen's standard vacation benefits and other employee benefits such as medical, vision and dental health insurance, covering employees and officers. These benefits may be modified or subject to change from time to time. A copy of FibroGen's current benefits summary has been provided to you.

Employment Eligibility. You will also be required to sign the Employment Eligibility Verification (Form I- 9). (You will need to complete and return Section One of Form I-9 along with your signed offer letter). On your first day of employment, please bring the necessary original documents that establish your identity and employment eligibility to work in the United States. Acceptable documents are listed on the reverse side of Form I-9. Such documentation must be provided to us within three (3) business days of your date of hire, or our employment relationship with you may be terminated.

Proprietary Information. You will abide by FibroGen’s strict company policy that prohibits any new employee from using or bringing with them from any prior employer any proprietary information, trade secrets, proprietary materials or processes of such former employers. Moreover, because FibroGen’s proprietary information is extremely important, this offer of employment is expressly subject to your execution of the enclosed Confidential Information, Secrecy and Invention Agreement for Employees.

At Will Employment. You should be aware that your employment with FibroGen is for no specified period and constitutes "at-will" employment. As a result, both FibroGen and you are free to terminate the employment relationship at any time, for any reason or for no reason, and with or without advance notice. The changing needs of FibroGen could also result in changes to certain aspects of your employment, such as compensation, responsibilities, location, etc. These provisions expressly supersede any previous representations, oral or written. Your at-will employment cannot be modified or amended except by written agreement signed by both you and the Chief Executive Officer of FibroGen.

Arbitration. Any dispute or claim, including all contract, tort, discrimination, and statutory claims, arising under or relating to your employment or termination of your employment with FibroGen (“Arbitrable Claim(s)”) shall be resolved by arbitration. “Arbitrable Claims” shall not include: (1) claims under applicable workers’ compensation law, (2) unemployment insurance claims, and (3) any disputes or claims relating to or arising out of the misuse or misappropriation of trade secrets. You and FibroGen hereby waive any rights each may have to a jury trial in regard to Arbitrable Claims. Arbitration for Arbitrable Claims will be conducted by the American Arbitration Association (“AAA”) in San Francisco (or other mutually agreed upon city) under the Employment Arbitration Rules and Mediation Procedures (“AAARules”).TheAAARulesareavailableat https://www.adr.org/sites/default/files/EmploymentRules_Web_0.pdf, or can be obtained by contacting the FibroGen Human Resources department or by calling AAA at ###-###-####. FibroGen will pay the fees and costs of the arbitrator. The arbitrator shall have the same authority as a court to award equitable relief, damages, costs, and fees (excluding the costs and fees for the arbitrator) as provided by law for the particular claims asserted. The arbitrator shall also have exclusive authority to rule on his or her own jurisdiction, including any objections with respect to the existence, scope, enforceability or validity of the arbitration agreement. Such arbitration shall be final and binding on the parties and shall be the exclusive remedy for Arbitrable Claims.

Benefits Overview