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 *   Welsh David S. 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) C/O ADAMS STREET PARTNERS LLC, ONE NORTH WACKER DRIVE SUITE 2200 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) CHICAGO, IL 60606 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 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 2,584,821 I See Footnote (1) Common Stock 2,235,689 I See Footnote (1) Common Stock 1,269,991 I See Footnote (1) Common Stock 1,084,176 I See Footnote (1)

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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Welsh David S. C/O ADAMS STREET PARTNERS LLC ONE NORTH WACKER DRIVE SUITE 2200 CHICAGO, IL 60606	  X	  X	Â	Â

Signatures

/s/ Frances Dea, attorney-in-fact		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)	Adams Street 2008 Direct Fund, L.P. is the record owner of 2,584,821 shares, Adams Street 2009 Direct Fund, L.P. is the record owner of 2,235,689 shares, Adams Street 2010 Direct Fund, L.P. is the record holder of 1,269,991 shares and Adams Street 2011 Direct Fund LP is the record owner of 1,084,176 shares. Adams Street Partners, LLC is the managing member of the general partner of each of AS 2008, AS 2009, AS 2010 and the managing member of the general partner of AS 2011's general partner. David S. Welsh is a partner of Adams Street Partners, LLC. Mr. Welsh disclaims beneficial ownership of all shares held by Adams Street Partners, LLC except to the extent of his pecuniary interest therein.
  Remarks: Exhibit List Exhibit 24 - Limited Power of Attorney

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