[Form 4] SES AI Corp Insider Trading Activity

Rhea-AI Filing Summary

SES AI Corp (SES) reported an insider stock transaction by its Chief Science Officer on a Form 4. On 11/17/2025, the officer exercised 150,000 stock options for Class A Common Stock at an exercise price of $0.15 per share, then sold 150,000 shares of Class A Common Stock at a weighted average price of $1.9015 per share, all pursuant to a Rule 10b5-1 trading plan entered into on August 14, 2025. Following these transactions, the officer beneficially owns 1,253,286 shares of Class A Common Stock, including 852,222 shares underlying restricted stock units that remain subject to forfeiture until they vest, and holds 93,277 derivative securities in the form of vested stock options.

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

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

X

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^*

Gan Hong

(Last) (First) (Middle)

C/O SES AI CORPORATION

35 CABOT ROAD

(Street)

WOBURN MA 01801

(City) (State) (Zip)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF SCIENCE OFFICER

3. Date of Earliest Transaction (Month/Day/Year)
11/17/2025

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

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 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	11/17/2025		M(1)		150,000	A	$0.15	1,403,286(2)	D
Class A Common Stock	11/17/2025		S(1)		150,000	D	$1.9015(3)	1,253,286(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
Stock Option (Right to Buy)	$0.15	11/17/2025		M(1)			150,000	(4)	03/13/2029	Class A Common Stock	150,000	$0	93,277	D

Explanation of Responses:

1. The option exercise and sale of Class A Common Stock of the issuer was executed pursuant to a Rule 10b5-1 plan entered into by the Reporting Person on August 14, 2025.

2. Includes 852,222 shares of Class A Common Stock underlying restricted stock units, which are subject to forfeiture until they vest.

3. The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.85 to $1.99, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4.

4. Reflects fully vested options granted on March 14, 2019.

	/s/ Kyle Pilkington, Attorney-in-Fact	11/18/2025
	** 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.

FAQ

What insider transaction did SES AI Corp (SES) report on this Form 4?

The Chief Science Officer of SES AI Corp reported exercising 150,000 stock options for Class A Common Stock at $0.15 per share and selling 150,000 shares of Class A Common Stock at a weighted average price of $1.9015 per share.

Was the SES AI Corp (SES) insider trade made under a Rule 10b5-1 plan?

Yes. The option exercise and sale of Class A Common Stock were executed under a Rule 10b5-1 trading plan that the reporting person entered into on August 14, 2025.

How many SES AI Corp (SES) shares does the insider own after this transaction?

After the reported transactions, the insider beneficially owns 1,253,286 shares of SES Class A Common Stock, which includes 852,222 shares underlying restricted stock units that are subject to forfeiture until they vest.

What derivative securities does the SES AI Corp (SES) insider hold following the transaction?

The insider holds 93,277 derivative securities in the form of stock options with an exercise price of $0.15 per share, which were originally granted on March 14, 2019 and are fully vested.

What was the price range of SES AI Corp (SES) shares sold in this Form 4?

The $1.9015 per share sale price is a weighted average. The shares were sold in multiple transactions at prices ranging from $1.85 to $1.99 per share, inclusive.

What is the role of the reporting person at SES AI Corp (SES)?

The reporting person is an officer of SES AI Corp, serving as the company’s Chief Science Officer.