Tax withholding on 133K SES AI (SES) shares for CEO Hu Qichao

Rhea-AI Filing Summary

SES AI Corp CEO and Chairman Hu Qichao reported a tax-related share disposition tied to RSU vesting. On this Form 4, 133,303 shares of Class A Common Stock were withheld at $1.10 per share to cover withholding tax obligations when restricted stock units vested.

These shares were not sold on the market. After the withholding, Hu Qichao directly holds 3,945,182 shares of Class A Common Stock, including 1,993,239 shares underlying RSUs that remain subject to forfeiture until they vest.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Hu Qichao

Role CEO & CHAIRMAN

Type	Security	Shares	Price	Value
Tax Withholding	Class A Common Stock	133,303	$1.10	$147K

Holdings After Transaction: Class A Common Stock — 3,945,182 shares (Direct)

Footnotes (1)

1. Represents shares withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units ("RSUs"). These shares were not sold by the Reporting Person. Includes 1,993,239 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

Key Figures

Tax-withheld shares: 133,303 shares Withholding price: $1.10 per share Shares held after transaction: 3,945,182 shares +1 more

4 metrics

Tax-withheld shares 133,303 shares Shares withheld to cover tax obligations on RSU vesting

Withholding price $1.10 per share Value used for tax-withholding disposition of SES AI shares

Shares held after transaction 3,945,182 shares Direct Class A Common Stock holdings after withholding

Unvested RSU underlying shares 1,993,239 shares Class A Common Stock underlying RSUs subject to forfeiture until vesting

Key Terms

restricted stock units ("RSUs"), withholding tax obligations, Class A Common Stock

3 terms

restricted stock units ("RSUs") financial

"in connection with the vesting of restricted stock units ("RSUs")."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

withholding tax obligations financial

"shares withheld to cover the Reporting Person's withholding tax obligations"

Class A Common Stock financial

"Includes 1,993,239 shares of Class A Common Stock underlying RSUs"

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.

Form 4 Insider Transactions: What Each Field Means →

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^*

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)
04/14/2026

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	04/14/2026		F(1)		133,303(1)	D	$1.1	3,945,182(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 withheld to cover the Reporting Person's withholding tax obligations in connection with the vesting of restricted stock units ("RSUs"). These shares were not sold by the Reporting Person.

2. Includes 1,993,239 shares of Class A Common Stock underlying RSUs, which are subject to forfeiture until they vest.

	/s/ Kyle Pilkington, Attorney-in-Fact	04/16/2026
	** 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)

FAQ

What did Hu Qichao report in the latest SES (SES) Form 4 filing?

Hu Qichao reported a tax-related disposition of SES AI Corp Class A Common Stock. 133,303 shares were withheld at $1.10 per share to satisfy withholding tax obligations arising from the vesting of restricted stock units, and were not sold on the open market.

How many SES AI shares were withheld for Hu Qichao’s tax obligations?

SES AI withheld 133,303 shares of Class A Common Stock for Hu Qichao’s tax obligations. The withholding occurred in connection with the vesting of restricted stock units, meaning these shares covered taxes rather than representing an open-market sale of stock.

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

After the tax-withholding transaction, Hu Qichao directly holds 3,945,182 SES AI Class A Common shares. This total includes both vested shares and shares underlying restricted stock units that have not yet fully vested and remain subject to forfeiture conditions.

What does the Form 4 say about Hu Qichao’s SES restricted stock units (RSUs)?

The Form 4 states Hu Qichao’s holdings include 1,993,239 SES AI shares underlying RSUs. These RSUs are subject to forfeiture until they vest, meaning the underlying shares are not fully owned until vesting conditions are satisfied over time.

Was Hu Qichao’s SES AI tax-withholding transaction an open-market sale?

No, the filing specifies the 133,303 SES AI shares were withheld to cover Hu Qichao’s withholding tax obligations. The footnote clarifies these shares were not sold by the reporting person, distinguishing this from a discretionary open-market sale of stock.