CUSIP No. 921659108
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13G
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Page 2 of 8 Pages
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1
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NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
TANG CAPITAL PARTNERS, LP
|
|
2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
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(a) ¨
(b) ý
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3
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SEC USE ONLY
|
|
4
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CITIZENSHIP OR PLACE OF ORGANIZATION
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
0
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6
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SHARED VOTING POWER
1,951,252
|
|
7
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SOLE DISPOSITIVE POWER
0
|
|
8
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SHARED DISPOSITIVE POWER
1,951,252
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9
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AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,951,252
|
10
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CHECK BOX 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
6.9%
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12
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TYPE OF REPORTING PERSON
PN
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CUSIP No. 921659108
|
13G
|
Page 3 of 8 Pages
|
1
|
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
TANG CAPITAL MANAGEMENT, LLC
|
|
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
|
(a) ¨
(b) ý
|
3
|
SEC USE ONLY
|
|
4
|
CITIZENSHIP OR PLACE OF ORGANIZATION
DELAWARE
|
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH REPORTING
PERSON WITH
|
5
|
SOLE VOTING POWER
0
|
6
|
SHARED VOTING POWER
1,951,252
|
|
7
|
SOLE DISPOSITIVE POWER
0
|
|
8
|
SHARED DISPOSITIVE POWER
1,951,252
|
9
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,951,252
|
10
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
¨
|
11
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
6.9%
|
12
|
TYPE OF REPORTING PERSON
OO
|
CUSIP No. 921659108
|
13G
|
Page 4 of 8 Pages
|
1
|
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
KEVIN C. TANG
|
|
2
|
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
|
(a) ¨
(b) ý
|
3
|
SEC USE ONLY
|
|
4
|
CITIZENSHIP OR PLACE OF ORGANIZATION
UNITED STATES
|
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH REPORTING
PERSON WITH
|
5
|
SOLE VOTING POWER
0
|
6
|
SHARED VOTING POWER
1,951,252
|
|
7
|
SOLE DISPOSITIVE POWER
0
|
|
8
|
SHARED DISPOSITIVE POWER
1,951,252
|
9
|
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
1,951,252
|
10
|
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
¨
|
11
|
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
6.9%
|
12
|
TYPE OF REPORTING PERSON
IN
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Item 1(a).
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Name of Issuer:
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Item1 (b).
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Address of Issuer’s Principal Executive Offices:
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Item 2(a).
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Name of Person Filing:
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Item 2(b).
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Address of Principal Business Office or, if none, Residence:
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Item 2(c).
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Citizenship:
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Item 2(d).
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Title of Class of Securities:
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Item 2(e).
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CUSIP Number: 921659108
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Item 3.
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Not applicable.
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Item 4.
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Ownership.
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(a)
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Amount Beneficially Owned:
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(b)
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Percent of Class:
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Tang Capital Partners
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6.9%
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Tang Capital Management
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6.9%
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Kevin C. Tang
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6.9%
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(c)
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Number of shares as to which such person has:
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(i)
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sole power to vote or to direct the vote:
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Tang Capital Partners
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0 shares
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Tang Capital Management
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0 shares
|
Kevin C. Tang
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0 shares
|
(ii)
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shared power to vote or to direct the vote:
|
Tang Capital Partners
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1,951,252 shares
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Tang Capital Management
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1,951,252 shares
|
Kevin C. Tang
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1,951,252 shares
|
(iii)
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sole power to dispose or to direct the disposition of:
|
Tang Capital Partners
|
0 shares
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Tang Capital Management
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0 shares
|
Kevin C. Tang
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0 shares
|
(iv)
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shared power to dispose or to direct the disposition of:
|
Tang Capital Partners
|
1,951,252 shares
|
Tang Capital Management
|
1,951,252 shares
|
Kevin C. Tang
|
1,951,252 shares
|
Item 5.
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Ownership of Five Percent or Less of a Class.
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Item 6.
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Ownership of More than Five Percent on Behalf of Another Person.
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Item 7.
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Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.
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Item 8.
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Identification and Classification of Members of the Group.
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Item 9.
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Notice of Dissolution of Group.
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Item 10.
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Certification.
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Date:
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April 20, 2012
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||
TANG CAPITAL PARTNERS, LP
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By: Tang Capital Management, LLC, its General Partner
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By:
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/s/ Kevin C. Tang
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Kevin C. Tang, Manager
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TANG CAPITAL MANAGEMENT, LLC
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By:
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/s/ Kevin C. Tang
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||
Kevin C. Tang, Manager
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/s/ Kevin C. Tang
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Kevin C. Tang |