CUSIP No. 92337F 10 7 Page 1 of 5 Pages
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
_____________________
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SCHEDULE 13G
(Rule 13d-102)
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INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED
PURSUANT TO RULE 13d-2(b)
(Amendment No. 1)1
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(Name of Issuer)
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Common Stock, $0.001 par value
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(Title of Class of Securities)
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92337F 10 7
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(CUSIP Number)
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December 31, 2014
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Date of Event Which Requires Filing of this Statement
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Check the appropriate box to designate the rule pursuant to which this Schedule is Filed:
[ ] Rule 13d-1(b)
[ ] Rule 13d-1(c)
[X] Rule 13d-1(d)
_______________________
1The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page. The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.
CUSIP No. 92337F 10 7 Page 2 of 5 Pages
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1)
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Name of Reporting Person
I.R.S. Identification
No. of Above Person
(Entities Only)
(Voluntary)
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Domain Partners VIII, L.P.
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2)
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Check the Appropriate Box
if a Member of a Group
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(a) [X]
(b) [ ]
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3)
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SEC Use Only
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4)
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Citizenship or Place
of Organization
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Delaware
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Number of
Shares Beneficially
Owned by Each
Reporting Person
With
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5)
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Sole Voting
Power
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2,763,294 shares of Common Stock *
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6)
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Shared Voting
Power
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-0-
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7)
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Sole Dispositive
Power
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2,763,294 shares of Common Stock *
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8)
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Shared Dispositive Power
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-0-
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9)
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Aggregate Amount Beneficially Owned by Each Reporting Person
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2,763,294 shares of Common Stock *
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10)
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Check if the Aggregate Amount in Row (9) Excludes Certain Shares
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11)
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Percent of Class Represented by Amount in Row (9)
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12.3% **
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12)
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Type of Reporting Person
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PN
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* As of December 31, 2014
** Based on 22,523,529 shares of Common Stock outstanding as of December 31, 2014
CUSIP No. 92337F 10 7 Page 3 of 5 Pages
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1)
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Name of Reporting Person
I.R.S. Identification
No. of Above Person
(Entities Only)
(Voluntary)
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DP VIII Associates, L.P.
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2)
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Check the Appropriate Box
if a Member of a Group
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(a) [X]
(b) [ ]
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3)
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SEC Use Only
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4)
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Citizenship or Place
of Organization
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Delaware
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Number of
Shares Beneficially
Owned by Each
Reporting Person
With
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5)
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Sole Voting
Power
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22,730 shares of Common Stock *
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6)
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Shared Voting
Power
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-0-
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7)
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Sole Dispositive
Power
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22,730 shares of Common Stock *
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8)
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Shared Dispositive Power
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-0-
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9)
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Aggregate Amount Beneficially Owned by Each Reporting Person
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22,730 shares of Common Stock *
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10)
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Check if the Aggregate Amount in Row (9) Excludes Certain Shares
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11)
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Percent of Class Represented by Amount in Row (9)
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0.1% **
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12)
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Type of Reporting Person
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PN
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* As of December 31, 2014
** Based on 22,523,529 shares of Common Stock outstanding as of December 31, 2014
CUSIP No. 92337F 10 7 Page 4 of 5 Pages
Amendment No. 1 to Schedule 13G
Reference is hereby made to the statement on Schedule 13G relating to the Issuer filed with the Securities and Exchange Commission by the Reporting Persons on February 6, 2014 (the “Schedule 13G”). Terms defined in the Schedule 13G are used herein as so defined.
The following items of the Schedule 13G are amended and restated as follows:
Item 4 – Ownership.
(a) through (c):
The information set forth in Items 5 through 9 and 11 of the cover pages to this Amendment No. 1 to Schedule 13G is incorporated herein by reference. In addition, as of December 31, 2014 One Palmer Square Associates VIII, L.L.C., the sole general partner of each of the Reporting Persons, directly beneficially owned 25,245 shares of Common Stock, or approximately 0.1% of the Common Stock outstanding.
CUSIP No. 92337F 10 7 Page 5 of 5 Pages
Signature:
After reasonable inquiry and to the best of their knowledge and belief, the undersigned hereby certify that the information set forth in this statement is true, complete and correct.
Dated: February 3, 2015
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DOMAIN PARTNERS VIII, L.P.
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By:
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One Palmer Square Associates VIII, L.L.C., General Partner
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By:
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/s/ Kathleen K. Schoemaker
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Managing Member
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DP VIII ASSOCIATES, L.P.
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By:
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One Palmer Square Associates VIII, L.L.C., General Partner
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By:
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/s/ Kathleen K. Schoemaker
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Managing Member
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