Ownership Submission
FORM 3
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF 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 *
  Partech U.S. Partners IV, L.L.C.
2. Date of Event Requiring Statement (Month/Day/Year)
04/03/2014
3. Issuer Name and Ticker or Trading Symbol
Five9, Inc. [FIVN]
(Last)
(First)
(Middle)
50 CALIFORNIA ST., STE 3200
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

SAN FRANCISCO, CA 94111
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 Beneficially Owned
1.Title of Security
(Instr. 4)
2. Amount of Securities Beneficially Owned
(Instr. 4)
3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)
4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 3,493,291
D (1) (2)
 
Common Stock 675,221
I
See Footnotes (1) (2)
Common Stock 1,112,333
I
See Footnotes (1) (2)
Common Stock 675,223
I
See Footnotes (1) (2)
Common Stock 274,920
I
See Footnotes (1) (2)
Common Stock 24,459
I
See Footnotes (1) (2)
Common Stock 24,459
I
See Footnotes (1) (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)
2. Date Exercisable and Expiration Date
(Month/Day/Year)
3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)
4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)
6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Warrant (right to buy common stock)   (3)(4)   (3)(4) Common Stock 7,804 $ 0.652 D (3) (4)  
Warrant (right to buy common stock)   (3)(4)   (3)(4) Common Stock 1,283 $ 0.652 I See Footnotes (3) (4)
Warrant (right to buy common stock)   (3)(4)   (3)(4) Common Stock 2,114 $ 0.652 I See Footnotes (3) (4)
Warrant (right to buy common stock)   (3)(4)   (3)(4) Common Stock 1,283 $ 0.652 I See Footnotes (3) (4)
Warrant (right to buy common stock)   (3)(4)   (3)(4) Common Stock 522 $ 0.652 I See Footnotes (3) (4)
Warrant (right to buy common stock)   (3)(4)   (3)(4) Common Stock 54 $ 0.652 I See Footnotes (3) (4)
Warrant (right to buy common stock)   (3)(4)   (3)(4) Common Stock 54 $ 0.652 I See Footnotes (3) (4)
Warrant (right to buy common stock)   (5)(6)   (5)(6) Common Stock 11,706 $ 0.652 D (5) (6)  
Warrant (right to buy common stock)   (5)(6)   (5)(6) Common Stock 1,924 $ 0.652 I See Footnotes (5) (6)
Warrant (right to buy common stock)   (5)(6)   (5)(6) Common Stock 3,170 $ 0.652 I See Footnotes (5) (6)
Warrant (right to buy common stock)   (5)(6)   (5)(6) Common Stock 1,924 $ 0.652 I See Footnotes (5) (6)
Warrant (right to buy common stock)   (5)(6)   (5)(6) Common Stock 783 $ 0.652 I See Footnotes (5) (6)
Warrant (right to buy common stock)   (5)(6)   (5)(6) Common Stock 81 $ 0.652 I See Footnotes (5) (6)
Warrant (right to buy common stock)   (5)(6)   (5)(6) Common Stock 81 $ 0.652 I See Footnotes (5) (6)

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, CA 94111
    X    
WORMS VINCENT
50 CALIFORNIA ST., STE 3200
SAN FRANCISCO, CA 94111
    X    

Signatures

/s/ Vincent R. Worms, managing member of the Reporting Owner 04/03/2014
**Signature of Reporting Person Date

/s/ Vincent R. Worms 04/03/2014
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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) Partech U.S. Partners IV, L.L.C. ("Partech US") is the record owner of 3,493,291 shares, Partech International Growth Capital I L.L.C. ("Partech I") is the record owner of 675,221 shares, Partech International Growth Capital II L.L.C. ("Partech II") is the record owner of 1,112,333 shares, Partech International Growth Capital III L.L.C. ("Partech III") is the record owner of 675,223 shares, AXA Growth Capital II L.P. ("AXA") is the record owner of 274,920 shares, 45th Parallel L.L.C. ("45th Parallel") is the record owner of 24,459 shares, and Par SF II, L.L.C.
(2) (Continued from footnote 1)("Par SF") is the record owner of 24,453 shares. Vincent R. Worms is (A) the sole member of Par SF, (B) the managing member of 47th Parallel, L.L.C., which is the managing member of Partech US, (C) the managing member of 45th Parallel, which is the managing member of 46th Parallel, L.L.C., which is the managing member of Partech I, Partech II and Partech III and (D) the managing member of 48th Parallel, L.L.C., which is the investment general partner of AXA, and 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.
(3) Partech US is the record owner of warrants exercisable for 7,804 shares, Partech I is the record owner of warrants to purchase 1,283 shares, Partech II is the record owner of warrants to purchase 2,114 shares, Partech III is the record owner of warrants to purchase 1,283 shares, AXA is the record owner of warrants to purchase 522 shares, 45th Parallel is the record owner of warrants to purchase 54 shares and PAR SF is the record owners of warrants to purchase 54 shares.
(4) (Continued from footnote 3)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. 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.
(5) Partech US is the record owner of warrants exercisable for 11,706 shares, Partech I is the record owner of warrants to purchase 1,924 shares, Partech II is the record owner of warrants to purchase 3,170 shares, Partech III is the record owner of warrants to purchase 1,924 shares, AXA is the record owner of warrants to purchase 783 shares, 45th Parallel is the record owner of warrants to purchase 81 shares and PAR SF is the record owners of warrants to purchase 81 shares.
(6) (Continued from footnote 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. 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.
 
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