Hesai awards 157,000 RSUs to chief scientist

Sun Kai reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Sun Kai reported acquisition or exercise transactions in this Form 4 filing.

Hesai Group reported that Chief Scientist and significant shareholder Kai Sun received a grant of 157,000 restricted share units on March 25, 2026. Each unit gives the right to receive one Class B ordinary share upon vesting, so this award ties directly to future equity ownership.

The RSUs vest in four equal annual installments over a four-year period, starting from the first anniversary of May 31, 2026, and require Kai Sun to remain in service through each vesting date. Following this grant, he holds 157,000 RSUs, reflecting a compensation-related equity award rather than any open-market purchase or sale.

Insider Trade Summary

Grant/Award: 157,000 shares

Grant/Award 1 txn

Insider Sun Kai

Role Chief Scientist

Type	Security	Shares	Price	Value
Grant/Award	Restricted share units	157,000	$0.00	$0.00

Holdings After Transaction: Restricted share units — 157,000 contracts (Direct)

Footnotes (2)

1. F1. Each restricted share unit represents the contingent right to receive one (1) Class B ordinary share upon vesting.
2. F2. These restricted share units were granted on March 25, 2026, and vest per annum in four equal installments over a 4-year period, starting from the first anniversary of May 31, 2026, subject to the reporting person's continued service through the applicable vesting date. The restricted share units do not have expiration dates.

FAQ

What insider transaction did Hesai Group (HSAI) disclose for Kai Sun?

Hesai Group disclosed that Chief Scientist Kai Sun received a grant of 157,000 restricted share units. This is a compensation-related equity award, not an open-market trade, and represents the right to receive Class B ordinary shares as the units vest over time.

How many RSUs were granted to Kai Sun and what do they convert into for HSAI?

Kai Sun was granted 157,000 restricted share units. Each unit represents a contingent right to receive one Class B ordinary share of Hesai Group upon vesting, directly linking his compensation to the company’s equity over the vesting period.

What is the vesting schedule for Kai Sun’s 157,000 Hesai Group RSUs?

The 157,000 restricted share units granted to Kai Sun vest in four equal annual installments over a four-year period. Vesting begins on the first anniversary of May 31, 2026, and requires his continued service with Hesai Group through each applicable vesting date.

Does this Hesai Group Form 4 show any share sales by Kai Sun?

No, the Form 4 reports only a grant of 157,000 restricted share units to Kai Sun. It does not show any open-market purchases or sales, but instead documents a stock-based compensation award that may convert into Class B ordinary shares as it vests.

Why is Kai Sun’s 157,000 RSU grant relevant for Hesai Group (HSAI) investors?

The 157,000 RSU grant increases Kai Sun’s incentive to focus on Hesai Group’s long-term performance. Because each restricted share unit converts into a Class B ordinary share upon vesting, his potential ownership grows gradually, aligning compensation with shareholder interests over several years.

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Accepted by SEC EDGAR 03/27/2026 - 07:50 AM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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)

CHINA

(Country)

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

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

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

2a. Foreign Trading Symbol
[[HKEX: 2525]]

3. Date of Earliest Transaction (Month/Day/Year)
03/25/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted share units	(1)	03/25/2026		A		157,000		(2)	(2)	Class B ordinary shares	157,000	$0	157,000	D

Explanation of Responses:

1. Each restricted share unit represents the contingent right to receive one (1) Class B ordinary share upon vesting.

2. These restricted share units were granted on March 25, 2026, and vest per annum in four equal installments over a 4-year period, starting from the first anniversary of May 31, 2026, subject to the reporting person's continued service through the applicable vesting date. The restricted share units do not have expiration dates.

	/s/ Kai Sun	03/27/2026
	** 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 4 (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 4: SEC 1474 (03-26)