Sec Form 4 Filing - Partech U.S. Partners IV, L.L.C. @ Five9, Inc. - 2014-04-03

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

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

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) 50 CALIFORNIA ST., STE 3200 3. Date of Earliest Transaction (MM/DD/YY) 04/03/2014 (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 04/03/2014 X 19,510 A $ 0 3,512,801 D Common Stock 04/03/2014 S 1,818 D $ 7 3,510,983 D Common Stock 04/03/2014 X 3,207 A $ 0 678,428 I By Partech International Growth Capital I L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 S 300 D $ 7 678,128 I By Partech International Growth Capital I L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 X 5,284 A $ 0 1,117,617 I By Partech International Growth Capital II L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 S 493 D $ 7 1,117,124 I By Partech International Growth Capital II L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 X 3,207 A $ 0 678,430 I By Partech International Growth Capital III L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 S 300 D $ 7 678,130 I By Partech International Growth Capital III L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 X 1,305 A $ 0 276,225 I By AXA Growth Capital II L.P. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 S 122 D $ 7 276,103 I By AXA Growth Capital II L.P. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 X 135 A $ 0 24,594 I By 45th Parallel L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 S 14 D $ 7 24,580 I By 45th Parallel L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 X 135 A $ 0 24,594 I By Par SF II, L.L.C. ( 1 ) ( 2 ) ( 3 ) Common Stock 04/03/2014 S 14 D $ 7 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 Warrant (right to buy common stock) $ 0.652 04/03/2014 X 7,804 02/28/2008 04/09/2014( 4 ) Common Stock 7,804 $ 0 0 D Warrant (right to buy common stock) $ 0.652 04/03/2014 X 1,283 02/28/2008 04/09/2014( 4 ) Common Stock 1,283 $ 0 0 I By Partech International Growth Capital I L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 2,114 02/28/2008 04/09/2014( 4 ) Common Stock 2,114 $ 0 0 I By Partech International Growth Capital II L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 1,283 02/28/2008 04/09/2014( 4 ) Common Stock 1,283 $ 0 0 I By Partech International Growth Capital III L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 522 02/28/2008 04/09/2014( 4 ) Common Stock 522 $ 0 0 I By AXA Growth Capital II L.P. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 54 02/28/2008 04/09/2014( 4 ) Common Stock 54 $ 0 0 I By 45th Parallel L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 54 02/28/2008 04/09/2014( 4 ) Common Stock 54 $ 0 0 I By Par SF II, L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 11,706 07/15/2008 04/09/2014( 5 ) Common Stock 11,706 $ 0 0 D Warrant (right to buy common stock) $ 0.652 04/03/2014 X 1,924 07/15/2008 04/09/2014( 5 ) Common Stock 1,924 $ 0 0 I By Partech International Growth Capital I L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 3,170 07/15/2008 04/09/2014( 5 ) Common Stock 3,170 $ 0 0 I By Partech International Growth Capital II L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 1,924 07/15/2008 04/09/2014( 5 ) Common Stock 1,924 $ 0 0 I By Partech International Growth Capital III L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 783 07/15/2008 04/09/2014( 5 ) Common Stock 783 $ 0 0 I By AXA Growth Capital II L.P. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 81 07/15/2008 04/09/2014( 5 ) Common Stock 81 $ 0 0 I By 45th Parallel L.L.C. ( 1 ) ( 2 ) ( 3 ) Warrant (right to buy common stock) $ 0.652 04/03/2014 X 81 07/15/2008 04/0 9/2014( 5 ) Common Stock 81 $ 0 0 I By Par SF II, L.L.C. ( 1 ) ( 2 ) ( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Partech U.S. Partners IV, L.L.C. 50 CALIFORNIA ST., STE 3200 SAN FRANCISCO, CA94111 X WORMS VINCENT 50 CALIFORNIA ST., STE 3200 SAN FRANCISCO, CA94111 X Signatures /s/ Vincent R. Worms, managing member of the Reporting Owner 04/07/2014 Signature of Reporting Person Date /s/ Vincent R. Worms 04/07/2014 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. ( 4 )The warrants are exercisable, in whole or in part, until the earliest to occur of (i) the seven (7)-year anniversary of February 28, 2008; or (ii) the issuance and sale of shares of the Company's common stock in the Company's first underwritten public offering pursuant to an effective registration statement. ( 5 )The warrants are exercisable, in whole or in part, until the earliest to occur of (i) the seven (7)-year anniversary of July 15, 2008; or (ii) the issuance and sale of shares of the Company's common stock in the Company's first underwritten public offering pursuant to an effective registration statement.

Remarks: Form 2 of 2.

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).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.