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Hong Kong 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 arising from or in reliance upon the whole or any part of the contents of this announcement.

Hesai Group

禾賽科技*

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

(Stock Code: 2525)

(NASDAQ Stock Ticker: HSAI)

POLL RESULTS OF THE EXTRAORDINARY GENERAL MEETING AND CLASS MEETINGS HELD ON MARCH 3, 2026

References are made to the Notice of the Extraordinary General Meeting (the “EGM”), the Notice of Class A Meeting (the “Class A Meeting”) and the Notice of Class B Meeting (the “Class B Meeting”, together with the Class A Meeting, the “Class Meetings”) each dated January 26, 2026 (collectively, the “Notices”) and the circular to the holders of Company’s Shares (the “Shareholders”) of even date (the “Circular”) of Hesai Group (the “Company”). Unless otherwise required by the context, capitalized terms used in this announcement shall have the same meanings as defined in the Circular and the Notices.

POLL RESULTS OF THE EGM AND THE CLASS MEETINGS

The board of directors (the “Board”) of the Company is pleased to announce that the EGM was held shortly after the conclusion of the Class B Meeting, on March 3, 2026 at No. 28, Ciyun Road, Yancheng Lake Peninsula, Weiting Town, Suzhou Industrial Park, Jiangsu Province, People’s Republic of China.

All resolutions proposed at the EGM have been duly passed. As of the Shares Record Date, the total number of issued Shares was 157,142,211 Shares, comprising 26,998,861 Class A Ordinary Shares and 130,143,350 Class B Ordinary Shares, which was the total number of Shares entitling Shareholders to attend and vote in favour of, against or in abstention on the resolutions proposed at the EGM. There was no Shareholder who was required to abstain from voting under the Listing Rules on any resolution proposed at the EGM, nor any Shareholder who was entitled to attend the EGM but was required to abstain from voting in favour of any resolution proposed at the EGM pursuant to Rule 13.40 of the Listing Rules. No Shareholder has indicated in the Circular that he or she intends to vote against or in abstention in respect of any resolution proposed at the EGM.

Accordingly, the total number of Shares entitling the holder to attend and vote on the resolutions numbered 1 to 6 proposed at the EGM was 157,142,211 Shares, comprising 26,998,861 Class A Ordinary Shares and 130,143,350 Class B Ordinary Shares. As at the date of this announcement, there were (i) no treasury shares held by the Company (including any treasury shares held or deposited with CCASS), and (ii) no repurchased Shares which are pending cancellation and should be excluded from the total number of issued Shares for the purpose of the EGM.

Treasury shares, if any, registered under the name of the Company, shall have no voting rights at the general meeting(s) of the Company. For the avoidance of doubt, for the purpose of the Listing Rules, the Company shall, upon depositing any treasury shares in the CCASS, abstain from voting at any of its general meeting(s) in relation to those shares.

According to the Company’s second amended and restated memorandum and articles of association (the “Memorandum and Articles of Association”) and the Undertaking for Interim Compliance, with regard to the resolutions numbered 1 to 6, each Class A Ordinary Share shall entitle its holder to ten votes and each Class B Ordinary Share shall entitle its holder to one vote on a poll at the EGM.

In accordance with the provisions of the Listing Rules, voting on the resolutions proposed at the EGM was conducted by way of poll. The voting results in respect of the resolutions proposed at the EGM are set out as follows:

The Board is pleased to announce that the Class A Meeting was held at 1:30 p.m., Beijing time, on March 3, 2026 at No. 28, Ciyun Road, Yancheng Lake Peninsula, Weiting Town, Suzhou Industrial Park, Jiangsu Province, People’s Republic of China. The resolution proposed at the Class A Meeting has been duly passed.

As of the Shares Record Date, the Company had a total of 26,998,861 Class A Ordinary Shares in issue, which was the total number of Shares entitled to vote on the resolution proposed at the Class A Meeting. There was no Shareholder who was required to abstain from voting under the Listing Rules on the resolution proposed at the Class A Meeting, nor any Shareholder who was entitled to attend the Class A Meeting but was required to abstain from voting in favour of the resolution proposed at the Class A Meeting pursuant to Rule 13.40 of the Listing Rules. No person has indicated in the Circular that he or she intends to vote against or in abstention in respect of the resolution proposed at the Class A Meeting.

Shareholders and Shareholders’ proxies attending the Class A Meeting held a total of 26,998,861 Class A Ordinary Shares, representing 100.0000% of the total number of Class A Ordinary Shares carrying voting rights.

The voting results in respect of the resolution proposed at the Class A Meeting are set out as below:

The Board is pleased to announce that the Class B Meeting was held shortly after the conclusion of the Class A Meeting, on March 3, 2026 at No. 28, Ciyun Road, Yancheng Lake Peninsula, Weiting Town, Suzhou Industrial Park, Jiangsu Province, People’s Republic of China. The resolution proposed at the Class B Meeting has been duly passed.

As of the Shares Record Date, the Company had a total of 130,143,350 Class B Ordinary Shares in issue, which was the total number of Shares entitled to vote on the resolution proposed at the Class B Meeting. There was no Shareholder who was required to abstain from voting under the Listing Rules on the resolution proposed at the Class B Meeting, nor any Shareholder who was entitled to attend the Class B Meeting but was required to abstain from voting in favour of the resolution proposed at the Class B Meeting pursuant to Rule 13.40 of the Listing Rules. No person has indicated in the Circular that he or she intends to vote against or in abstention in respect of the resolution proposed at the Class B Meeting.

Shareholders and Shareholders’ proxies attending the Class B Meeting held a total of 94,727,468 Class B Ordinary Shares, representing approximately 72.7870% of the total number of Class B Ordinary Shares in the Company carrying voting rights.

The voting results in respect of the resolution proposed at the Class B Meeting are set out as below:

The Company’s share registrar in Hong Kong, Tricor Investor Services Limited, acted as the scrutineer for the vote-taking at the EGM and the Class Meetings.

The following Directors attended the EGM and the Class Meetings in person or via electronic means: Dr. Yifan Li and Ms. Cailian Yang. The other Directors were unable to attend the EGM and Class Meetings due to other business commitments.

Hong Kong, March 3, 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