Company: GDHLF
Filing Date: 2025-05-29
Form Type: 6-K
Source: 0001104659-25-054265
Chunk: 0

Company: GDS Holdings Ltd
Filing Date: 2025-05-29
Form: 6-K
Chunk 0
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<div align='center'>SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934

May 2025

Commission File Number: 001-37925

GDS Holdings Limited

(Registrant’s name)

F4/F5, Building C, Sunland International

No. 999 Zhouhai Road

Pudong, Shanghai 200137

People’s Republic of China

(Address of principal executive offices)</div>

Indicate by check mark whether the registrant files or will
file annual reports under cover of Form 20-F or Form 40-F:

<div align='center'>Form 20-Fx
Form 40-F ¨

INCORPORATION BY REFERENCE</div>

All exhibits to this current report on Form 6-K are incorporated
by reference into the registration statement on Form F-3 of GDS Holdings Limited (File No. 333-287594), and shall be a part
thereof from the date on which this report is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.

<div align='center'>EXHIBITS</div>

| 1.1  
 1.2  | Underwriting Agreement, dated May 27, 2025, by and among the Registrant, J.P. Morgan Securities plc and J.P. Morgan Securities LLC 
 Underwriting Agreement, dated May 27, 2025, by and among the Registrant and the underwriters thereto                               |
|:-----|:-----------------------------------------------------------------------------------------------------------------------------------|
| 99.1 | ADS Lending Agreement, dated May 27, 2025, between the Registrant and J.P. Morgan Securities LLC                                   |

<div align='center'>SIGNATURES</div>

Pursuant to the
requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

| Date: May 29, 2025 | GDS Holdings Limited 
 By:                  | /s/ William Wei Huang   |
|:-------------------|:---------------------|:------------------------|
|                    | Name:                | William Wei Huang       |
|                    | Title:               | Chief Executive Officer |