6-K

UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER

PURSUANT TO RULE 13a-16OR 15d-16 OF

THE SECURITIES EXCHANGEACT OF 1934

For the month ofMay 2026

Commission file number:001-39278

KingsoftCloud Holdings Limited

(Exact Name of Registrantas Specified in Its Charter)

Building D, Xiaomi Scienceand Technology Park, No. 33 Xierqi Middle Road,

Haidian District

Beijing, 100085, thePeople’s Republic of China

(Address of PrincipalExecutive Offices)

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

Form 20-F  x              Form 40-F  ¨

EXHIBIT INDEX

SIGNATURE

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.

Exhibit 99.1

HongKong Exchanges and Clearing Limited and The Stock Exchange of Hong Kong Limited take no responsibility for the contents of this announcement,make no representation as to its accuracy or completeness and expressly disclaim any liability whatsoever for any loss howsoever arisingfrom or in reliance upon the whole or any part of the contents of this announcement.

KingsoftCloud Holdings Limited

金山云控股有限公司

(Incorporatedin the Cayman Islands with limited liability)

(StockCode: 3896)

(NasdaqStock Ticker: KC)

DATEOF BOARD MEETING

The board of directors (the “Board”) of Kingsoft Cloud Holdings Limited (the “Company”) hereby announces that a meeting of the Board will be held on Wednesday, May 27, 2026, for the purpose of considering and approving, among other matters, the unaudited first quarterly results of the Company, its subsidiaries and consolidated affiliated entities for the three months ended March 31, 2026 and its publication.

The Company’s management will hold an earnings conference call on Wednesday, May 27, 2026, at 8:15 P.M. Beijing/Hong Kong Time (or 8:15 A.M. U.S. Eastern Time on the same day).

For participants who wish to join the call, please complete online registration using the link provided below prior to the scheduled call start time. Upon registration, each participant will receive access details for this conference including a conference access code, a PIN number (personal access code), the dial-in number, and an e-mail with detailed instructions to join the conference call.

Participant Online Registration:

https://register-conf.media-server.com/register/BI0c3c6d36e97944f292b62e0d1101c115

A live and archived webcast of the conference call will also be available at the Company’s investor relations website at https://ir.ksyun.com.

Hong Kong, May 14, 2026

Asat the date of this announcement, the board of directors of the Company comprises Mr. Zou Tao as Chairman and executive director,Mr. Qu Heng and Mr. Zhang Duo as non-executive directors, and Mr. Yu Mingto, Mr. Wang Hang and Ms. Qu Jingyuanas independent non-executive directors.