Company: GDHLF
Filing Date: 2025-08-20
Form Type: 6-K
Source: 0001104659-25-080576
Chunk: 0

Company: GDS Holdings Ltd
Filing Date: 2025-08-20
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

August 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 Reports Second Quarter 2025 Results |

<div align='center'>2

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: August 20, 2025 | GDS Holdings Limited 
 By:                  | /s/                     
 William Wei Huang       |
|:----------------------|:---------------------|:------------------------|
|                       | Name:                | William Wei Huang       |
|                       | Title:               | Chief Executive Officer |

<div align='center'>3</div>