[Form 4] X-Energy, Inc. Insider Trading Activity

Rhea-AI Filing Summary

X-Energy, Inc. filed a Form 4 identifying three entities — Ares Partners Holdco LLC, Ares X-Energy Holdings LP, and ACIP Investments Pooling LLC - Series 31 — as reporting persons, each described as a "Former 10% Owner". The filing does not report any insider share purchases, sales, derivative exercises, gifts, tax withholdings, or restructurings, as all transaction counts and share amounts are shown as zero.

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

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X

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^*

Ares Partners Holdco LLC

(Last) (First) (Middle)

C/O ARES MANAGEMENT LLC,

1800 AVENUE OF THE STARS, SUITE 1400

(Street)

LOS ANGELES CALIFORNIA 90067

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
X-Energy, Inc. [ XE ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/27/2026

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

	Form filed by One Reporting Person
X	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

1. Name and Address of Reporting Person^*

Ares Partners Holdco LLC

(Last) (First) (Middle)

C/O ARES MANAGEMENT LLC,

1800 AVENUE OF THE STARS, SUITE 1400

(Street)

LOS ANGELES CALIFORNIA 90067

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Ares X-Energy Holdings LP

(Last) (First) (Middle)

C/O ARES MANAGEMENT LLC,

245 PARK AVENUE, 44TH FLOOR

(Street)

NEW YORK NEW YORK 10167

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

ACIP Investments Pooling LLC - Series 31

(Last) (First) (Middle)

C/O ARES MANAGEMENT LLC,

1800 AVENUE OF THE STARS, SUITE 1400

(Street)

LOS ANGELES CALIFORNIA 90067

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

Remarks:

Upon the closing of the initial public offering of X-Energy, Inc. (the "Issuer") on April 27, 2026, the reporting persons' ownership of the Issuer's Class A common stock was diluted below 10% and the reporting persons are therefore no longer subject to Section 16 of the Securities Exchange Act of 1934, as amended. This exit report is made on a voluntary basis as the reporting persons have not acquired or disposed of any additional securities of the Issuer.

	Ares Partners Holdco LLC By: /s/ Anton Feingold; Authorized Signatory	04/29/2026
	Ares X-Energy Holdings LP By: /s/ Anton Feingold; Authorized Signatory	04/29/2026
	ACIP Investments Pooling LLC - Series 31 By: /s/ Noah Ehrenpreis; Authorized Signatory	04/29/2026
	** 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)