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Hesai Group

禾 賽 科 技 *

(A company controlled through weighted voting rights and incorporated in the Cayman Islands with limited liability)

(HKEX Stock Code: 2525)

(NASDAQ Stock Ticker: HSAI)

DATE OF BOARD MEETING

The board of directors (the “Board”) of Hesai Group (the “Company”) hereby announces that a meeting of the Board will be held on May 19, 2026 (Tuesday, Beijing/Hong Kong Time), for the purpose of considering and approving, among other matters, the unaudited quarterly results of the Company and its subsidiaries for the three months ended March 31, 2026 and its publication.

The Company’s management will host an earnings conference call at 8:00 A.M. (U.S. Eastern Time)/8:00 P.M. (Beijing/Hong Kong Time) on May 19, 2026, Tuesday). For participants who wish to join the call by phone, please access the link provided below to complete the pre-registration and dial in 5 minutes prior to the scheduled call start time. Upon registration, each participant will receive dial-in details to join the conference call.

Additionally, a live and archived webcast of the conference call will be available on the Company’s investor relations website at https://investor.hesaitech.com.

Hong Kong, April 27, 2026

As at the date of this announcement, the Board comprises: (i) Dr. Yifan Li, Dr. Kai Sun, Mr. Shaoqing Xiang and Ms. Cailian Yang as the executive Directors; and (ii) Ms. Yi Zhang, Mr. Jia Ren and Dr. Hui Wang as the independent non-executive Directors.

*    For identification purpose only