CUSIP NO. 92932M101

13 G

Page 8 of 12

This Amendment No. 2 amends the Schedule 13G filed with the Securities and Exchange Commission on September 26, 2006, as amended by Amendment No. 1 on February 12, 2009 by Charles P. Coleman III (“Coleman”), Tiger Global Management, LLC, a Delaware limited liability company (“Tiger Management”), Tiger Global II, L.P., a Delaware limited partnership, Tiger Global, L.P., a Delaware limited partnership, Tiger Global Performance, L.L.C., a Delaware limited liability company, and Tiger Global, Ltd., a Cayman Islands exempted company, and amends the Schedule 13G filed by Coleman and Tiger Management. The foregoing entities and individual are collectively referred to as the “Reporting Persons.” Only those items as to which there has been a change are included in this Amendment No. 2.

ITEM 4.

OWNERSHIP

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a)

Amount beneficially owned:

See Row 9 of cover page for each Reporting Person.

(b)

Percent of Class:

See Row 11 of cover page for each Reporting Person.

(c)

Number of shares as to which such person has:

(i)

Sole power to vote or to direct the vote:

See Row 5 of cover page for each Reporting Person.

(ii)

Shared power to vote or to direct the vote:

See Row 6 of cover page for each Reporting Person.

(iii)

Sole power to dispose or to direct the disposition of:

See Row 7 of cover page for each Reporting Person.

(iv)

Shared power to dispose or to direct the disposition of:

See Row 8 of cover page for each Reporting Person.

ITEM 5.

OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than 5 percent of the class of securities, check the following: x