[Form 3] Hesai Group Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Hesai Group director and Chief Scientist Sun Kai has filed an initial ownership report showing a large indirect equity position in the company. The filing lists indirect ownership of 9,228,622 Class A ordinary shares held through Fermat Star Limited, establishing his reported stake at the time of this Form 3.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Sun Kai

(Last) (First) (Middle)

10TH FLOOR, BUILDING A

NO. 658 ZHAOHUA ROAD, CHANGNING DISTRICT

(Street)

SHANGHAI 200050

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
Hesai Group [ HSAI ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Scientist

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A ordinary shares	9,228,622	I	By Fermat Star Limited

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Kai Sun	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does Sun Kai's Form 3 filing for Hesai Group (HSAI) show?

The Form 3 shows initial beneficial ownership for director and Chief Scientist Sun Kai. It reports indirect holdings of 9,228,622 Class A ordinary shares of Hesai Group, establishing his disclosed equity position at the time of becoming a reporting insider.

How many Hesai Group (HSAI) shares does Sun Kai indirectly hold?

Sun Kai is reported as indirectly holding 9,228,622 Class A ordinary shares of Hesai Group. These shares are attributed to ownership through Fermat Star Limited, reflecting his disclosed stake when the Form 3 was filed.

Is Sun Kai buying or selling Hesai Group (HSAI) shares in this Form 3?

This Form 3 does not report a buy or sell transaction. It is an initial ownership statement, listing Sun Kai’s indirect holdings of 9,228,622 Class A ordinary shares rather than documenting new purchases or sales.

How are Sun Kai's Hesai Group (HSAI) shares held according to the filing?

The filing states that Sun Kai’s interest in Hesai Group is indirect, with 9,228,622 Class A ordinary shares held "By Fermat Star Limited." This indicates the position is owned through that entity rather than directly in his name.

What is Sun Kai's role at Hesai Group (HSAI) in this Form 3?

The Form 3 identifies Sun Kai as a director and officer of Hesai Group, serving as Chief Scientist. This status requires public reporting of his beneficial ownership, which is disclosed as an indirect stake in Class A ordinary shares.