Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Neff Thomas B
   2. Issuer Name and Ticker or Trading Symbol
FIBROGEN INC [FGEN] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Executive Officer
(Last)
(First)
(Middle)
C/O FIBROGEN, INC., 409 ILLINOIS ST.		 3. Date of Earliest Transaction (Month/Day/Year)
03/06/2018
(Street)

SAN FRANCISCO, CA 94158		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 03/06/2018   F   16,199 (1) D $ 53.55 2,907,425 D  
Common Stock 03/07/2018   M   10,265 A $ 2.35 2,917,690 D  
Common Stock 03/07/2018   S   8,802 (2) D $ 52.58 (3) 2,908,888 D  
Common Stock 03/07/2018   S   7,800 (2) D $ 53.26 (4) 2,901,088 D  
Common Stock 03/07/2018   S   2,298 (2) D $ 54.14 (5) 2,898,790 D  
Common Stock 03/07/2018   S   700 (2) D $ 52.82 (6) 121,634 I By Family Partnership
Common Stock 03/07/2018   S   218 (2) D $ 53.91 (7) 121,416 I By Family Partnership
Common Stock 03/08/2018   M   7,005 A $ 2.35 2,905,795 D  
Common Stock 03/08/2018   M   3,314 A $ 3.6 2,909,109 D  
Common Stock 03/08/2018   S   6,400 (2) D $ 52.74 (8) 2,902,709 D  
Common Stock 03/08/2018   S   11,800 (2) D $ 53.44 (9) 2,890,909 D  
Common Stock 03/08/2018   S   700 (2) D $ 54.09 (10) 2,890,209 D  
Common Stock 03/08/2018   S   300 (2) D $ 52.55 (11) 121,116 I By Family Partnership
Common Stock 03/08/2018   S   618 (2) D $ 53.59 (12) 120,498 I By Family Partnership
Common Stock               19,500 I By Spouse
Common Stock               60,946 I See footnote (13)

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy) $ 2.35 03/07/2018   M     10,265   (14) 03/12/2018 Common Stock 10,265 $ 0 7,005 D  
Stock Option (Right to Buy) $ 2.35 03/08/2018   M     7,005   (14) 03/12/2018 Common Stock 7,005 $ 0 0 D  
Stock Option (Right to Buy) $ 3.6 03/08/2018   M     3,314   (14) 03/11/2019 Common Stock 3,314 $ 0 472,145 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Neff Thomas B
C/O FIBROGEN, INC.
409 ILLINOIS ST.
SAN FRANCISCO, CA 94158		   X     Chief Executive Officer  

Signatures

 /s/ Dorothy Pacini, Attorney-in-fact   03/08/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Represents shares withheld by the issuer to satisfy a tax obligation realized by the reporting person upon the vesting of restricted stock units.
(2) Shares sold pursuant to a 10b5-1 plan.
(3) The shares were sold at prices ranging from $52.00 to $52.95. 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.
(4) The shares were sold at prices ranging from $53.00 to $53.90. 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.
(5) The shares were sold at prices ranging from $54.00 to $54.25. 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.
(6) The shares were sold at prices ranging from $52.30 to $53.20. 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.
(7) The shares were sold at prices ranging from $53.55 to $54.25. 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.
(8) The shares were sold at prices ranging from $52.05 to $53.00. 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.
(9) The shares were sold at prices ranging from $53.05 to $53.975. 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.
(10) The shares were sold at prices ranging from $54.00 to $54.10. 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.
(11) The shares were sold at prices ranging from $52.05 to $52.85. 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.
(12) The shares were sold at prices ranging from $53.20 to $54.10. 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.
(13) The shares are held by BioGrowth Partners, LP. The reporting person is the sole general partner of BioGrowth Partners, LP and has sole voting and dispositive power over the shares held by BioGrowth Partners, LP.
(14) Fully vested.

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