UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

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

THE SECURITIES EXCHANGE ACT OF 1934

For the month of May 2026

Commission File Number: 001-41611

Hesai Group

10th Floor, Building A

No. 658 Zhaohua Road, Changning District

Shanghai 200050

People’s Republic of China ~~(Address of principal executive offices)~~

(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 x     Form 40-F ¨

Exhibit Index

99.1 Announcement—Grant of Awards

99.1	Press Release — Hesai Group to Hold Annual General Meeting on June 26, 2026
99.2	Announcement — Proposed Share Subdivision and Proposed Change in Board Lot Size
99.3	Circular for Annual General Meeting
99.4	Notice of Annual General Meeting
99.5	Form of Proxy for Annual General Meeting

SIGNATURES

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.

Hesai Group

By	:	/s/ Yifan Li
Name	:	Yifan Li
Title	:	Chief Executive Officer

Date: May 20 26, 2026

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