NOAH 6-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TORULE13a-16 OR 15d-16 UNDERTHE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2026

Commission File Number: 001-34936

Noah Holdings Limited

(Registrant’s name)

333 North Bridge Road, #05-11

Odeon 333

Singapore 188721

+65 6911-8211

(Address of principal executive office)

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.

Exhibit99.1

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.

NoahHoldings

NoahHoldings Private Wealth and Asset Management Limited

諾亞控股私人財富資產管理有限公司

(Incorporatedin the Cayman Islands with limited liability under the name Noah Holdings Limited and carrying on

businessin Hong Kong as Noah Holdings Private Wealth and Asset Management Limited)

(StockCode: 6686)

SUPPLEMENTALANNOUNCEMENT

DATEOF BOARD MEETING AND

DATEOF ANNOUNCEMENT OF SECOND QUARTER AND HALF YEAR 2026 UNAUDITED FINANCIAL RESULTS

Reference is made to the announcement (the “Announcement”) of Noah Holdings Private Wealth and Asset Management Limited (the “Company”) dated August 13, 2026 in relation to the date of the board meeting and the date of announcement of the second quarter and half year 2026 unaudited financial results. Unless the context requires otherwise, capitalized terms used in this announcement shall have the same meanings as those defined in the Announcement.

The Company was subsequently informed by the conference call service provider that the Hong Kong and Mainland China toll-free numbers previously set out in the Announcement would no longer be available for the earnings conference call. Accordingly, the Company would like to update the relevant dial-in details. For ease of reference, the updated dial-in details are set out below, with the changes shown in bold:

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This announcement is supplemental to and should be read in conjunction with the Announcement. The above updated information does not affect other information and content set out in the Announcement. Save as disclosed in this announcement, all information in the Announcement remains unchanged.

Hong Kong, August 16, 2026

Asof the date of this announcement, the Board comprises Ms. Jingbo Wang, the chairwoman and Mr. Zhe Yin as Directors; Ms. Chia-Yue Chang,Mr. Boquan He and Mr. David Zhang as non-executive Directors; and Ms. Xiangrong Li, Ms. Cynthia Jinhong Meng and Ms. May Yihong Wu asindependent Directors.

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