SCHEDULE 13D

Hesai Group

Class B ordinary shares, par value of $0.0001 per share · CUSIP: G4417G106

Event date: 2025-04-24

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Kai SunReported CIK 0001998340

  Shares: 27,163,892.00 · Class: 20.5%

• Fermat Star Limited

  Shares: 9,228,622.00 · Class: 7.0%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.