Sec Form 4 Filing - BVF PARTNERS L P/IL @ ChemoCentryx, Inc. - 2015-11-02

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 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 BVF PARTNERS L P/IL 2. Issuer Name and Ticker or Trading Symbol ChemoCentryx, Inc. [ CCXI] 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) ONE SANSOME STREET, 30TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 11/02/2015 (Street) SAN FRANCISCO, CA94104 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ 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 Common Stock 11/02/2015 S 50,000 ( 6 ) D $ 6.9703 2,744,577 I ( 1 ) ( 4 ) ( 5 ) See Explanation of Reponses Common Stock 2,162,381 I ( 1 ) ( 2 ) See Explanation of Reponses Common Stock 1,251,914 I ( 1 ) ( 3 ) See Explanation of Reponses

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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BVF PARTNERS L P/IL ONE SANSOME STREET 30TH FLOOR SAN FRANCISCO, CA94104 X BIOTECHNOLOGY VALUE FUND L P ONE SANSOME STREET 30TH FLOOR SAN FRANCISCO, CA94104 See Explanation of Responses BIOTECHNOLOGY VALUE FUND II LP ONE SANSOME STREET 30TH FLOOR SAN FRANCISCO, CA94104 See Explanation of Responses BVF INC/IL ONE SANSOME STREET 30TH FLOOR SAN FRANCISCO, CA94104 X LAMPERT MARK N ONE SANSOME STREET 30TH FLOOR SAN FRANCISCO, CA94104 X BVF INVESTMENTS LLC ONE SANSOME ST 30TH FLOOR SAN FRANCISCO, CA94104 See Explanation of Responses Signatures BVF Partners L.P., By: BVF Inc., its GP, By: /s/ Mark N. Lampert, President 11/02/2015 Signature of Reporting Person Date BIOTECHNOLOGY VALUE FUND, L.P. By: BVF Partners L.P., its GP, By: BVF Inc., By: /s/ Mark N. Lampert, President 11/02/2015 Signature of Reporting Person Date BIOTECHNOLOGY VALUE FUND II, L.P., By: BVF Partners L.P., its GP, By: BVF Inc., By: /s/ Mark N. Lampert, President 11/02/2015 Signature of Reporting Person Date BVF INC., By: /s/ Mark N. Lampert, President 11/02/2015 Signature of Reporting Person Date Mark N. Lampert, By: /s/ Mark N. Lampert 11/02/2015 Signature of Reporting Person Date BVF Investments, L.L.C., By: BVF Partners L.P., its manager, By: BVF Inc., its general partner, By: /s/ Mark N. Lampert, President 11/02/2015 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This Form 4 is filed jointly by Biotechnology Value Fund, L.P. ("BVF"), Biotechnology Value Fund II, L.P. ("BVF2"), BVF Investments, L.L.C. ("BVFLLC"), BVF Partners L.P. ("Partners"), BVF Inc. and Mark N. Lampert (collectively, the "Reporting Persons"). Each of the Reporting Persons may be deemed to be a member of a Section 13G group that collectively owns more than 10% of the Issuer's outstanding shares of Common Stock. Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein. ( 2 )Represents shares of Common Stock owned directly by BVF. As the general partner of BVF, Partners may be deemed to beneficially own the shares of Common Stock owned directly by BVF. As the investment adviser and general partner of Partners, BVF Inc., may be deemed to beneficially own the shares of Common Stock owned directly by BVF. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the shares of Common Stock owned directly by BVF. ( 3 )Represents shares of Common Stock owned directly by BVF2. As the general partner of BVF2, Partners may be deemed to beneficially own the shares of Common Stock owned directly by BVF2. As the investment adviser and general partner of Partners, BVF Inc., may be deemed to beneficially own the shares of Common Stock owned directly by BVF2. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the shares of Common Stock owned directly by BVF2. ( 4 )Represents shares of Common Stock owned directly by BVFLLC. As the manager of BVFLLC, Partners may be deemed to beneficially own the shares of Common Stock owned directly by BVFLLC. As the investment adviser and general partner of Partners, BVF Inc., may be deemed to beneficially own the shares of Common Stock owned directly by BVFLLC. As a director and officer of BVF Inc., Mr. Lampert may be deemed to beneficially own the shares of Common Stock owned directly by BVFLLC. ( 5 )The shares of Common Stock are directly beneficially owned by BVFLLC, a Delaware limited liability company. Pursuant to the operating agreement of BVFLLC, BVF Partners, L.P., a Delaware limited partnership is authorized, among other things, to invest the contributed capital of Samana Capital, L.P., the majority member of BVFLLC, in the shares of Common Stock and other securities and to vote, exercise or convert and dispose of such securities and is entitled to receive fees based on assets under management and, subject to certain exceptions, allocations based on realized and unrealized gains on such assets. ( 6 )Units may represent aggregation of daily trade activity. Details regarding individual execution amounts and prices are available upon request.

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).

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