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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

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FORM 6-K

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REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16
OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

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For the Month of March 202 5

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Commission File Number: 001-35126

VNET Group, Inc.

Guanjie Building, Southeast 1st Floor

10# Jiuxianqiao East Road

Chaoyang District

Beijing 100016

The People’s Republic of China

(Address of principal executive offices)

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

Form 20-F ☒ Form 40-F ☐

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SIGNATURES

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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.

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​ | ​ | ​
| VNET Group, Inc.
| By: | /s/ Qiyu Wang
| Name: | Qiyu Wang
| Title: | Chief Financial Officer
Date: March 13, 2025 |  |

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EXHIBIT INDEX

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​ | ​ | ​
Exhibit No. |  | Description
99.1 |  | Press release titled “VNET Announces Proposed Offering of Convertible Senior Notes”
99.2. | ​ | Management’s Discussion and Analysis of Financial Condition and Results of Operations
99.3. | ​ | Unaudited Condensed Consolidated Financial Statements
101.INS | ​ | Inline XBRL Instance Document
101.SCH | ​ | Inline XBRL Taxonomy Extension Schema Document
101.CAL | ​ | Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF | ​ | Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB | ​ | Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE | ​ | Inline XBRL Taxonomy Extension Presentation Linkbase Document
104 | ​ | Cover Page Interactive Data File (embedded within the Inline XBRL document)

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