Company: GDHLF
Filing Date: 2025-05-07
Form Type: 6-K
Source: 0001104659-25-045352
Chunk: 0

Company: GDS Holdings Ltd
Filing Date: 2025-05-07
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 ¨

EXHIBITS</div>

| 99.1 | Press release — GDS to Report First Quarter 2025 Financial Results Before the Open of the U.S. 
 Market on May 20, 2025                                                                         |
|:-----|:-----------------------------------------------------------------------------------------------|
| 99.2 | Announcement — Date of Board Meeting                                                           |

<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 7, 2025 | GDS Holdings Limited 
 By:                  | /s/                     
 William Wei Huang       |
|:------------------|:---------------------|:------------------------|
|                   | Name:                | William Wei Huang       |
|                   | Title:               | Chief Executive Officer |