Sec Form 4 Filing - Partech U.S. Partners IV, L.L.C. @ Five9, Inc. - 2015-12-02

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 Partech U.S. Partners IV, L.L.C. 2. Issuer Name and Ticker or Trading Symbol Five9, Inc. [ FIVN] 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) 200 CALIFORNIA ST., STE 500 3. Date of Earliest Transaction (MM/DD/YY) 12/02/2015 (Street) SAN FRANCISCO, CA94111 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 3,510,983 D Common Stock 12/02/2015 J 678,128 D $ 0 0 I By Partech International Growth Capital I L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 12/02/2015 J 1,117,124 D $ 0 0 I By Partech International Growth Capital II L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 12/02/2015 J 678,130 D $ 0 0 I By Partech International Growth Capital III L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 12/02/2015 J 276,103 D $ 0 0 I By AXA Growth Capital II L.P. ( 1 ) ( 2 ) ( 3 ) Common Stock 24,580 I By 45th Parallel L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 24,580 I By Par SF II, L.L.C. ( 1 ) ( 2 ) ( 3 )

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 Partech U.S. Partners IV, L.L.C. 200 CALIFORNIA ST., STE 500 SAN FRANCISCO, CA94111 X WORMS VINCENT 200 CALIFORNIA ST., STE 500 SAN FRANCISCO, CA94111 X Signatures /s/ Vincent R. Worms, managing member of 47th Parallel, L.L.C., the managing member of the Reporting Person 12/04/2015 Signature of Reporting Person Date /s/ Vincent R. Worms 12/04/2015 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Vincent R. Worms is (A) the sole member of Par SF II L.L.C. ("Par SF"), (B) the managing member of 47th Parallel, L.L.C. ("47th Parallel"), which is the managing member of Partech U.S. Partners IV, L.L.C. ("Partech US"), (C) the managing member of 45th Parallel L.L.C. ("45th Parallel"), which is the managing member of 46th Parallel L.L.C. ("46th Parallel"), which is the managing member of Partech International Growth Capital I L.L.C. ("Partech I"), Partech International Growth Capital II L.L.C.("Partech II") and Partech International Growth Capital III L.L.C. ("Partech III") ( 2 )(Continued from footnote1) and (D) the managing member of 48th Parallel L.L.C. ("48th Parallel"), which is the investment general partner of AXA Growth Capital II L.P. ("AXA"). ( 3 )Vincent R. Worms may be deemed to have voting control and investment power over the securities held by Par SF, Partech US, 45th Parallel, Partech I, Partech II, Partech III and AXA, but disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein.

Remarks: Form 2 of 2Five9, Inc. shares were distributed out to various partners by Partech I, Partech II, Partech III and AXA.

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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