SES AI CEO granted 1.50M restricted stock units

Hu Qichao reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Hu Qichao reported acquisition or exercise transactions in this Form 4 filing.

SES AI Corp CEO and Chairman Hu Qichao received a large equity award in the form of restricted stock units. On May 18, 2026, he was granted 1,504,425 RSUs tied to Class A common stock at no cash purchase price, as part of the company’s 2021 Incentive Award Plan.

The RSUs vest in three equal installments on the first, second, and third anniversaries of the grant date, subject to continued employment or service. After this grant, Hu Qichao holds 5,449,607 shares of Class A common stock, including 3,497,664 shares underlying RSUs that remain subject to forfeiture until they vest.

Insider Trade Summary

Grant/Award: 1,504,425 shares

Grant/Award 1 txn

Insider Hu Qichao

Role CEO & CHAIRMAN

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock	1,504,425	$0.00	$0.00

Holdings After Transaction: Class A Common Stock — 5,449,607 shares (Direct)

Footnotes (2)

1. F1. Represents shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), underlying restricted stock units ("RSUs") granted to the reporting person on May 18, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, in three equal installments on the first, second and third anniversaries of the Grant Date, subject to continued employment or service through each applicable vesting date.
2. F2. Includes 3,497,664 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

Key Figures

RSUs granted: 1,504,425 RSUs Grant price per share: $0.0000 per share Total shares after grant: 5,449,607 shares +1 more

4 metrics

RSUs granted 1,504,425 RSUs Restricted stock units granted on May 18, 2026

Grant price per share $0.0000 per share Stated price for Class A common stock underlying RSUs

Total shares after grant 5,449,607 shares Class A common stock held following the reported transaction

Unvested RSU underlying shares 3,497,664 shares Class A shares underlying RSUs subject to forfeiture until vesting

Key Terms

restricted stock units, RSUs, 2021 Incentive Award Plan, Class A Common Stock

4 terms

restricted stock units financial

"Represents shares of Class A common stock ... underlying restricted stock units ("RSUs") granted to the reporting person"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

RSUs financial

"Includes 3,497,664 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture"

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

2021 Incentive Award Plan financial

"RSUs granted ... pursuant to the Issuer's 2021 Incentive Award Plan"

Class A Common Stock financial

"Represents shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock")"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did SES (SES) CEO Hu Qichao report in this Form 4?

Hu Qichao reported receiving 1,504,425 restricted stock units tied to SES AI Corp Class A common stock. These RSUs are part of the 2021 Incentive Award Plan and represent a compensation-related equity grant, with no cash purchase price per share disclosed in the filing.

How do Hu Qichao’s new SES RSUs vest over time?

The 1,504,425 SES RSUs vest in three equal installments on the first, second, and third anniversaries of the May 18, 2026 grant date. Each vesting tranche requires Hu Qichao to maintain continued employment or service through the applicable vesting date to receive the underlying shares.

How many SES shares does Hu Qichao hold after this Form 4 transaction?

Following this equity grant, Hu Qichao holds 5,449,607 shares of SES AI Corp Class A common stock. This figure includes 3,497,664 shares underlying RSUs that remain subject to forfeiture until they vest, reflecting both currently issued shares and unvested restricted stock units.

What is the nature of the SES RSU grant reported by Hu Qichao?

The filing describes the 1,504,425 units as restricted stock units, or RSUs, granted under SES AI Corp’s 2021 Incentive Award Plan. RSUs convert into an equal number of Class A common shares upon vesting, subject to service-based conditions, rather than being purchased for cash in the market.

Does this SES Form 4 show a market purchase or sale by Hu Qichao?

No market purchase or sale is reported. The Form 4 reflects a grant of 1,504,425 RSUs as compensation, with a stated price per share of $0.0000. The transaction increases his potential share ownership as the RSUs vest, rather than recording an open-market trade.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/20/2026 - 05:30 PM EDT 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
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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^*

Hu Qichao

(Last) (First) (Middle)

C/O SES AI CORPORATION

35 CABOT ROAD

(Street)

WOBURN MASSACHUSETTS 01801

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SES AI Corp [ SES ]

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

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	CEO & CHAIRMAN

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/18/2026

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
Class A Common Stock	05/18/2026		A(1)		1,504,425(1)	A	$0	5,449,607(2)	D

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

Explanation of Responses:

1. Represents shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), underlying restricted stock units ("RSUs") granted to the reporting person on May 18, 2026 (the "Grant Date") pursuant to the Issuer's 2021 Incentive Award Plan. The RSUs will vest, and an equal number of shares of Class A Common Stock will be deliverable to the reporting person, in three equal installments on the first, second and third anniversaries of the Grant Date, subject to continued employment or service through each applicable vesting date.

2. Includes 3,497,664 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

	/s/ Kyle Pilkington, Attorney-in-Fact	05/20/2026
	** 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)