Class A Ordinary Shares, par value $0.00005 per share

GDS Holdings Limited

F4/F5, Building C, Sunland International, Pudong, Shanghai, F4, 200137

Item 5(a) of the Statement is hereby amended and restated in its entirety as follows: STT, through its ownership of STTC and STT Garnet, is deemed for purposes of Rule 13d-3 under the Exchange Act to be the beneficial owner of 445,288,484 Class A Shares, including 16,000,000 Class A Shares issuable upon conversion of the 0.25% Convertible Senior Notes due 2029, or approximately 28.7% of the outstanding Class A Shares, and to have shared power over the voting and disposition of such Class A Shares, as of September 10, 2025. STTC, through its ownership of STT Garnet, is deemed for purposes of Rule 13d-3 under the Exchange Act to be the beneficial owner of 445,288,484 Class A Shares, including 16,000,000 Class A Shares issuable upon conversion of the 0.25% Convertible Senior Notes due 2029, or approximately 28.7% of the outstanding Class A Shares, and to have shared power over the voting and disposition of such Class A Shares, as of September 10, 2025. STT Garnet directly owns 445,288,484 Class A Shares (directly or in the form of ADSs), including 16,000,000 Class A Shares issuable upon conversion of the 0.25% Convertible Senior Notes due 2029, or approximately 28.7% of the outstanding Class A Shares, and has shared power over the voting and disposition of such Class A Shares, as of September 10, 2025. Temasek, through its ownership of STT, STTC and STT Garnet, is deemed for purposes of Rule 13d-3 under the Exchange Act to be the beneficial owner of 445,288,484 Class A Shares, including 16,000,000 Class A Shares issuable upon conversion of the 0.25% Convertible Senior Notes due 2029, or approximately 28.7% of the outstanding Class A Shares, and to have shared power over the voting and disposition of such Class A Shares, as of September 10, 2025. 43,590,336 Class B Shares were disclosed as outstanding as of May 31, 2025 as set forth in the 2025 Proxy Statement. On that basis, the Class A Shares deemed to be beneficially owned by the Reporting Persons as of September 10, 2025 represented approximately 18.4% of the aggregate voting power on the matters with Class A Shares and Class B Shares voting on a 1:20 basis described herein and approximately 27.9% of the aggregate voting power on the matters with Class A Shares and Class B Shares voting on a 1:1 basis described herein. To the knowledge of the Reporting Persons, the directors and executive officers of the Reporting Persons listed in Schedule A hereto beneficially own in the aggregate less than 1% of the Issuer's outstanding Class A Shares (directly or in the form of ADSs) as of September 10, 2025. The number of shares beneficially owned assumes the completion of the September 2025 Secondary Sales. The foregoing percentages are based on 1,536,506,711 Class A Shares outstanding, comprising 1,607,430,567 Class A Shares outstanding as of May 31, 2025, less 70,923,856 Class A Shares represented by ADS held by JPMorgan Chase Bank, N.A., as depositary, which are reserved for future delivery upon exercise or vesting of share awards granted under the Issuer's share incentive plans, as set forth in the 2025 Proxy Statement.

Item 5(b) of the Statement is hereby amended and restated in its entirety as follows: The information set forth in Item 5(a) hereof is hereby incorporated by reference into this Item 5(b)

As part of STT's review of its investment portfolio on a continuing basis, on September 10, 2025, STT Garnet sold 48,000,000 Class A Shares (in the form of ADSs) at a price of $32.20 per ADS pursuant to Rule 144 under the Securities Act of 1933, as amended. Immediately following the foregoing sales, STT Garnet continues to beneficially retain and own Class A Shares representing not less than 25% of the Issuer's issued and outstanding share capital and there is no change in STT's existing governance rights as a result of the foregoing sales under the Issuer's articles of association. In connection with the foregoing sales, STT Garnet agreed with each broker executing the trades that, for a period of 180 days following the sales, it will not, and will ensure that none of its subsidiaries will, offer, issue, sell or otherwise dispose of (or announce an intention to do so) any Class A Shares or any securities convertible into or exchangeable for or carrying rights to acquire other shares of the Issuer, other than in any off-market transaction or sale to a strategic investor without the prior written consent of the brokers. Except for the foregoing, there have been no transactions by the Reporting Persons or, to the knowledge of the Reporting Persons, any director or executive officer of any of the Reporting Persons in the Class A Shares of the Issuer (directly or in the form of ADSs) during the past sixty days.