VNET [21Vianet] SC 13D/A: CUSIP No. 90138A103 Page 2 of 6 1
[CUSIP No. 90138A103 Page 2 of 6 1 Names of Reporting Persons Temasek Holdings (Private) Limited 2 Check the Appropriate Box if a Member of a Group (a) ☐ (b) ☐ 3 SEC Use Only 4 Source Of Funds WC]