Exhibit 99.1

Hesai Group Reports Second Quarter 2026 Unaudited Financial Results

Quarterly net revenues were RMB860.8 million (US$126.9 million)¹

Quarterly lidar shipments were 628,275 units

Quarterly net income was RMB70.6 million (US$10.4 million)

SHANGHAI, China, Aug. 18, 2026 (GLOBE NEWSWIRE) － Hesai Group (“Hesai” or the “Company”) (NASDAQ: HSAI; HKEX: 2525), a global tech company and a leader in 3D perception, today announced its unaudited financial results for the three months ended June 30, 2026.

Management Remarks

“The second quarter of 2026 marked a defining milestone as Hesai has evolved into a full-stack infrastructure platform for Robotics and Physical AI – empowering them to see, understand, and act,” said Dr. Yifan “David” Li, Hesai’s Co-Founder and CEO. “We enable Robotics and Physical AI to see: lidar – our powerful and durable cash engine – is evolving from a ‘must-have’ toward ‘better and more’ in vehicles, the world’s most widely deployed robots. At the same time, demand for the same high-performance, robust, and reliable 3D sensing is rapidly expanding to humanoids and other intelligent machines, driving new orders from Unitree, Robbyant, Galbot, Galaxea, Dexmal, and others. Picasso, our full-color, ultra-sensitive 6D SPAD-SoC, on the other hand, represents a major leap forward in perception technology by enabling a unified 3D understanding of depth, semantics, and how environments evolve over time – delivering true multimodality, which is indispensable for world models and physical AI.”

Dr. Li continued, “We enable them to understand: Kosmo, our spatial intelligence platform, transforms the physical world into AI-ready, reusable 3D spatial assets. That gives robots one of the scarcest and most valuable inputs: geometrically accurate, physically grounded digital representations of the physical world, helping bridge the sim-to-real gap and unlock robotics scaling laws. After prototype deliveries in July 2026, we secured orders from a lineup of leading humanoid robotics companies, including Galbot, with initial revenues expected in the third quarter of 2026 as part of Strategic Growth Initiatives (“SGI”). And we enable them to act: high-performance joints represent another of robotics’ toughest bottlenecks. Leveraging our deep precision engineering expertise, we re-engineered actuation modules from first principles to deliver precise control, compact size, high force output, and true backdrivability in one design. Our proprietary modules are already showing commercial traction: modules began generating revenues in the second quarter, and Hesai is now supplying robotic actuation modules to Sharpa, a global frontrunner in AI robotics. Our production line is fully operational, with shipments underway for dexterous hands and full-body joints ramping soon. By empowering them to see, understand and act in a closed loop, Hesai is entering an exciting new chapter of growth – building the foundational infrastructure for a future shaped by Robotics and Physical AI.”

“Hesai’s performance in the 2026 second quarter provides strong validation of our next chapter of growth. Our core lidar business continued to deliver profitable scale and strong cash generation, while SGI began translating technological leadership into commercial momentum,” said Mr. Andrew Fan, Hesai’s CFO. “Net revenues reached RMB861 million for the three months ended June 30, 2026, with ADAS and Robotics lidar shipments growing 60% and 193% compared to the same period last year, respectively. Net income reached RMB71 million for the three months ended June 30, 2026, up 60% year-over-year despite continued investments in building SGI. The second quarter of 2026 marked our fifth consecutive quarter of GAAP profitability.”

Mr. Fan continued, “This quarter also marked SGI’s first revenue contribution, led by strong early commercial traction for our industry-leading robotic actuation modules. Driven by stronger-than-expected commercialization momentum and market demand across SGI, including Kosmo on track to begin contributing revenues in the third quarter of 2026, we are raising our full-year 2026 SGI revenue guidance from RMB100 million to a range of RMB200-300 million. We are particularly encouraged by SGI’s growth trajectory and expect the business to reach approximately US$100 million in revenues in 2027 and achieve breakeven in the same year.”

Financial Highlights for the Second Quarter of 2026

(in RMB millions, except for per ordinary share data and percentage)

Business Outlook

For the third quarter of 2026, the Company expects net revenues to be between RMB1,100 million (US$162 million) and RMB1,150 million (US$169 million), representing a year-over-year increase of approximately 38% to 45%.

The above outlook is based on current market conditions and reflects the Company’s preliminary estimates of market and operating conditions and customer demand, which are all subject to change.

Conference Call

The Company’s management will host an earnings conference call at 8:00 AM U.S. Eastern Time on August 18, 2026 (8:00 PM Beijing/Hong Kong Time on August 18, 2026).

For participants who wish to join the call by phone, please access the link provided below to complete the pre-registration process 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.

A replay of the conference call will be accessible approximately an hour after the conclusion of the call until August 25, 2026, by dialing the following telephone numbers:

⁵       Cash reserve represents cash and cash equivalents, restricted cash, short-term investments (exclude stock investment) and long-term time deposits.

About Hesai

Hesai Technology (Nasdaq: HSAI; HKEX: 2525) is a global tech company and a leader in 3D perception. Leveraging full-stack proprietary ASIC capabilities and an integrated R&D-testing-manufacturing approach, Hesai has established industry-leading positions across core physical AI domains, including ADAS-equipped passenger vehicles, autonomous mobility, spatial intelligence, embodied AI, as well as industrial, agricultural, and service robots. Hesai has established offices in Shanghai, Palo Alto, and Stuttgart, and operates in-house factories in China and Thailand, with customers spanning more than 40 countries. As the AI-driven Fourth Industrial Revolution accelerates, Hesai is committed to becoming a key enabler of physical AI – digitizing the real world and redefining how humans and robots perceive and act.

Use of Non-GAAP Financial Measures

To supplement Hesai’s consolidated financial results presented in accordance with GAAP, Hesai uses the following measures defined as non-GAAP financial measures by the U.S. Securities and Exchange Commission (the “SEC”): income/loss from operations excluding share-based compensation expenses, net income excluding share-based compensation expenses, net income attributable to ordinary shareholders excluding share-based compensation, and per ordinary share net income attributable to ordinary shareholders excluding share-based compensation. The presentation of these non-GAAP financial measures is not intended to be considered in isolation or as a substitute for the financial information prepared and presented in accordance with GAAP.

Hesai believes that these non-GAAP financial measures provide meaningful supplemental information regarding its performance and liquidity by excluding share-based compensation expenses that may not be indicative of its operating performance from a cash perspective. Hesai believes that both management and investors benefit from referring to these non-GAAP financial measures in assessing its performance and when planning and forecasting future periods. These non-GAAP financial measures also facilitate management’s internal comparisons to Hesai’s historical performance and liquidity. Hesai believes these non-GAAP financial measures are useful to investors in allowing for greater transparency with respect to supplemental information used by management in its financial and operational decision making. A limitation of using these non-GAAP financial measures is that they exclude share-based compensation expenses that have been and will continue to be for the foreseeable future a significant recurring expense in our business. Management compensates for these limitations by providing specific information regarding the GAAP amounts excluded from each non-GAAP financial measure. The accompanying tables have more details on the reconciliations between GAAP financial measures that are most directly comparable to non-GAAP financial measures.

Exchange Rate Information

This announcement contains translations of certain RMB amounts into U.S. dollars at a specified rate solely for the convenience of the reader. Unless otherwise noted, all translations from RMB to U.S. dollars and from U.S. dollars to RMB are made at a rate of RMB6.7851 to US$1.00, the exchange rate on June 30, 2026, set forth in the H.10 statistical release of the Federal Reserve Board. The Company makes no representation that the RMB or U.S. dollars amounts referred to could be converted into U.S. dollars or RMB, as the case may be, at any particular rate or at all.

Safe Harbor Statement

This announcement contains forward-looking statements. These statements are made under the “safe harbor” provisions of the U.S. Private Securities Litigation Reform Act of 1995. These forward-looking statements can be identified by terminology such as “will,” “expects,” “anticipates,” “aims,” “future,” “intends,” “plans,” “believes,” “estimates,” “confident,” “potential,” “continue” or other similar expressions. Among other things, the business outlook and quotations from management in this announcement, as well as the Company’s strategic and operational plans, contain forward-looking statements. The Company may also make written or oral forward-looking statements in its periodic reports to the SEC, in its annual report to shareholders, in press releases and other written materials and in oral statements made by its officers, directors or employees to third parties. Statements that are not historical facts, including but not limited to statements about the Company’s beliefs and expectations, are forward-looking statements. Forward-looking statements involve inherent risks and uncertainties. A number of factors could cause actual results to differ materially from those contained in any forward-looking statement, including but not limited to the following: the Company’s goals and strategies; the Company’s future business development, financial condition and results of operations; expected changes in the Company’s revenues, costs or expenditures; the trends in, expected growth and the market size of the ADAS and Robotics industries; the market for and adoption of lidar and related technology; the Company’s ability to produce high-quality products with wide market acceptance; the success of the Company’s customers in developing and commercializing products using its solutions, and the market acceptance of those products; the Company’s ability to introduce new products that meet its customers’ requirements; the Company’s expectations regarding the effectiveness of its marketing initiatives and the relationship with its third-party partners; competition in the Company’s industry; the Company’s ability to recruit and retain qualified personnel; relevant government policies and regulations relating to the Company’s industry; the Company’s ability to protect its systems and infrastructures from cyber-attacks; general economic and business conditions globally and in China; and assumptions underlying or related to any of the foregoing. Further information regarding these and other risks is included in the Company’s filings with the SEC. All information provided in this announcement and in the attachments is as of the date of this announcement, and the Company undertakes no obligation to update any forward-looking statement, except as required under applicable law. In the event of any inconsistency between the English version of this earnings release and its Chinese translation, the English version of this document shall prevail unless otherwise stated.

For investor and media inquiries, please contact:

Hesai Group

Capital Markets Department

Email: ir@hesaitech.com

Christensen Advisory

Tel: +86-10-5900-1548

Email: hesai@christensencomms.com

Source: Hesai Group

HESAI GROUP

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

(All amounts in thousands, except share and per share data or otherwise noted)

HESAI GROUP

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF

COMPREHENSIVE INCOME (LOSS)

(All amounts in thousands, except share and per share data or otherwise noted)

HESAI GROUP

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF

COMPREHENSIVE INCOME (LOSS)

(All amounts in thousands, except share and per share data or otherwise noted)

HESAI GROUP

UNAUDITED RECONCILIATIONS OF GAAP AND NON-GAAP RESULTS

(All amounts in thousands, except share and per share data or otherwise noted)

HESAI GROUP

UNAUDITED RECONCILIATIONS OF GAAP AND NON-GAAP RESULTS

(All amounts in thousands, except share and per share data or otherwise noted)

HESAI GROUP

UNAUDITED FINANCIAL INFORMATION BY SEGMENT

(All amounts in thousands, except share and per share data or otherwise noted)

HESAI GROUP

UNAUDITED FINANCIAL INFORMATION BY SEGMENT

(All amounts in thousands, except share and per share data or otherwise noted)