VNET [21Vianet] 6-K: QuickLinks — Click here to rapidly navigate through

[QuickLinks -- Click here to rapidly navigate through this document SUPPLEMENTAL INFORMATION RELATING TO 21VIANET GROUP, INC. BUSINESS OVERVIEW Overview We are a leading carrier-neutral and cloud-neutral data center services provider in China. We have one of the largest carrier-neutral data center ne]

VNET [21Vianet] 6-K: (Original Filing)

[QuickLinks -- Click here to rapidly navigate through this document SUPPLEMENTAL INFORMATION RELATING TO 21VIANET GROUP, INC. BUSINESS OVERVIEW Overview We are a leading carrier-neutral and cloud-neutral data center services provider in China. We have one of the largest carrier-neutral data center ne]

VNET [21Vianet] SC 13G/A: (Original Filing)

[SCHEDULE 13G CUSIP No. 90138A103 Page 2 of 5 Pages 1 NAME OF REPORTING PERSONS GIC Private Limited 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) ☐ (b) ☐ 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Republic of Singapore NUMBER OF SHARES BENEFICIALLY OWNED BY EACH]

VNET [21Vianet] SC 13G/A: SCHEDULE 13G CUSIP No. 90138A103 Page 2 of

[SCHEDULE 13G CUSIP No. 90138A103 Page 2 of 5 Pages 1 NAME OF REPORTING PERSONS GIC Private Limited 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) ☐ (b) ☐ 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Republic of Singapore NUMBER OF SHARES BENEFICIALLY OWNED BY EACH]

VNET [21Vianet] 6-K: (Original Filing)

[21Vianet Announces Full Exercise of Underwriters’ Option to Purchase Additional ADSs BEIJING, August 31, 2020 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (“21Vianet” or the “Company”) (Nasdaq: VNET), a leading carrier-neutral and cloud-neutral data center services provider in China, today announced that]

VNET [21Vianet] 6-K: 21Vianet Announces Full Exercise of Underwriters’ Option to

[21Vianet Announces Full Exercise of Underwriters’ Option to Purchase Additional ADSs BEIJING, August 31, 2020 (GLOBE NEWSWIRE) — 21Vianet Group, Inc. (“21Vianet” or the “Company”) (Nasdaq: VNET), a leading carrier-neutral and cloud-neutral data center services provider in China, today announced that]

VNET [21Vianet] 6-K: (Original Filing)

[17,000,000 American Depositary Shares Representing 102,000,000 Class A Ordinary Shares, Par value US$0.00001 Per Share 21VIANET GROUP, INC. UNDERWRITING AGREEMENT [ · Credit Suisse Securities (USA) LLC Eleven Madison Avenue New York, N.Y. 10010-3629 Morgan Stanley & Co. LLC 1585 Broadway New York, N]

VNET [21Vianet] 6-K: 17,000,000 American Depositary Shares Representing 102,000,000 Class A

[17,000,000 American Depositary Shares Representing 102,000,000 Class A Ordinary Shares, Par value US$0.00001 Per Share 21VIANET GROUP, INC. UNDERWRITING AGREEMENT [ · Credit Suisse Securities (USA) LLC Eleven Madison Avenue New York, N.Y. 10010-3629 Morgan Stanley & Co. LLC 1585 Broadway New York, N]

VNET [21Vianet] 6-K: (Original Filing)

[Our ref VSL/653749-000010/18182312v1 Direct tel Email 21Vianet Group, Inc. Guanjie Building Southeast 1st Floor 10# Jiuxianqiao East Road Chaoyang District Beijing, 100016 People’s Republic of China 25 August Dear Sirs 21Vianet Group, Inc. We have acted as Cayman Islands legal advisers to Company Re]

VNET [21Vianet] 6-K: Our ref VSL/653749-000010/18182312v1 Direct tel Email 21Vianet Group,

[Our ref VSL/653749-000010/18182312v1 Direct tel Email 21Vianet Group, Inc. Guanjie Building Southeast 1st Floor 10# Jiuxianqiao East Road Chaoyang District Beijing, 100016 People’s Republic of China 25 August Dear Sirs 21Vianet Group, Inc. We have acted as Cayman Islands legal advisers to Company Re]

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