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.

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.

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)

DATEOF BOARD MEETING AND

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

The board of directors (the “Board”) of Noah Holdings Private Wealth and Asset Management Limited (the “Company”, with its subsidiaries and consolidated affiliated entities, the “Group”) will hold a Board meeting on Tuesday, August 25, 2026 (Hong Kong Time) for the purpose of, among others, considering and approving the unaudited financial results of the Group for the three months and six months ended June 30, 2026 (the “Q2 and Interim Results”) and its publication. The Company will announce its Q2 and Interim Results at or around 6:00 a.m. Hong Kong Time on Wednesday, August 26, 2026 (6:00 p.m. U.S. Eastern Time on Tuesday, August 25, 2026) on the website of The Stock Exchange of Hong Kong Limited at www.hkexnews.hk.

Following the announcement of the Q2 and Interim Results, the Company’s senior management will host a combined English and Chinese language earnings conference call to discuss its Q2 and Interim Results and recent business activities. The conference call may be accessed with the following details:

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A telephone replay will be available starting approximately one hour after the end of the conference until August 31, 2026 at 1-855-669-9658 (US Toll Free) and 1-412-317-0088 (International Toll) with the access code 8252319.

A live and archived webcast of the conference call will be available at the Company’s investor relations website under the “Financial Reports” section at http://ir.noahgroup.com.

Hong Kong, August 13, 2026

As of the dateof this announcement, the Board comprises Ms. Jingbo Wang, the chairwoman and Mr. Zhe Yin as Directors; Ms. Chia-Yue Chang, Mr. BoquanHe and Mr. David Zhang as non-executive Directors; and Ms. Xiangrong Li, Ms. Cynthia Jinhong Meng and Ms. May Yihong Wu as independentDirectors.

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