Sec Form 3 Filing - BAY CITY CAPITAL LLC @ Kezar Life Sciences, Inc. - 2018-06-20

FORM 3 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 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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1. Name and Address of Reporting Person BAY CITY CAPITAL LLC 2. Issuer Name and Ticker or Trading Symbol Kezar Life Sciences, Inc. [ KZR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 750 BATTERY STREET, SUITE 400 3. Date of Earliest Transaction (MM/DD/YY) 06/20/2018 (Street) SAN FRANCISCO, CA94111 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Series B Preferred Stock $ 0 ( 3 ) ( 3 ) Common Stock 472,229 I See footnotes ( 1 ) ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BAY CITY CAPITAL LLC 750 BATTERY STREET, SUITE 400 SAN FRANCISCO, CA94111 X Signatures Bay City Capital LLC, a Delaware limited liability company, By: /s/ Fred Craves, Managing Director 06/20/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Bay City Capital LLC, a Delaware limited liability company (BCC), Bay City Capital JV Management I LLC, a Delaware limited liability company (Management I), Bay City Capital GF XINDE Investment Management Co., a Cayman Islands company (Management Co.), and Bay City Capital GF Xinde International Life Sciences USD Fund, L.P., a Cayman Islands exempt limited partnership (USD Fund) are deemed to be a group for the purposes of Section 13(d) under the Securities Exchange Act of 1934. Management Co. is the general partner of USD Fund and has voting and dispositive power with respect to the securities held by USD Fund. BCC is the manager of, and an advisor to, Management I, and Management I holds an equity interest in Management Co. ( 2 )Represent securities held by USD Fund, including indirect interests of BCC, Management I, and Management Co. BCC, Management I and Management Co. each disclaims beneficial ownership with respect to these securities, except to the extent of their pecuniary interest therein. ( 3 )Each share of Series B Preferred Stock will be automatically converted into one share of Common Stock, for no additional consideration, immediately prior to the consummation of the Issuer's initial public offering, and has no expiration date.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* 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).

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