Ares Partners Holdco LLC - 24 Apr 2026 Form 3 Insider Report for X-Energy, Inc. (XE)

Reporting relationship: 10%+ Owner
Issuer ticker: XE
Reported as of: 24 Apr 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 24 Apr 2026, 17:00:15 UTC
Next SEC filing: 29 Apr 2026
Source filing: View source filing
Reporting owner signature: Ares Partners Holdco LLC By: /s/ Anton Feingold; Authorized Signatory

Key filing fact

Ares Partners Holdco LLC filed Form 3 for X-Energy, Inc. (XE) on 24 Apr 2026.

Key facts

This page summarizes Ares Partners Holdco LLC's Form 3 filing for X-Energy, Inc. (XE).
0 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 24 Apr 2026, 17:00.

Change

No earlier filing in this sequence is available for direct comparison.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (3)

CIK 0001620263 Primary reporting owner

Ares Partners Holdco LLC

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC,, 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: Ares Partners Holdco LLC By: /s/ Anton Feingold; Authorized Signatory
Signature date: 24 Apr 2026

CIK 0002127049

Ares X-Energy Holdings LP

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC,, 245 PARK AVENUE, 44TH FLOOR, NEW YORK
Signature: Ares X-Energy Holdings LP By: /s/ Anton Feingold; Authorized Signatory
Signature date: 24 Apr 2026

CIK 0002127790

ACIP Investments Pooling LLC - Series 31

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC,, 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: ACIP Investments Pooling LLC - Series 31 By: /s/ Noah Ehrenpreis; Authorized Signatory
Signature date: 24 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

XE holding

Class A common stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,440,619
Date: 24 Apr 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3, F5

XE holding

Class A common stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,440,619
Date: 24 Apr 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3, F5

XE holding

Class A common stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,440,619
Date: 24 Apr 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3, F5

XE holding

Class B common stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 24,418,756
Date: 24 Apr 2026
Ownership: See Footnotes
Footnotes: F2, F3, F4, F5, F6

XE holding

Class B common stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 24,418,756
Date: 24 Apr 2026
Ownership: See Footnotes
Footnotes: F2, F3, F4, F5, F6

XE holding

Class B common stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 24,418,756
Date: 24 Apr 2026
Ownership: See Footnotes
Footnotes: F2, F3, F4, F5, F6

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

XE holding Derivative

Common Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 24 Apr 2026
Ownership: See Footnotes
Underlying class: Class A common stock
Underlying amount: 24,418,756
Exercise price
Footnotes: F2, F3, F4, F5, F6, F7

XE holding Derivative

Common Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 24 Apr 2026
Ownership: See Footnotes
Underlying class: Class A common stock
Underlying amount: 24,418,756
Exercise price
Footnotes: F2, F3, F4, F5, F6, F7

XE holding Derivative

Common Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 24 Apr 2026
Ownership: See Footnotes
Underlying class: Class A common stock
Underlying amount: 24,418,756
Exercise price
Footnotes: F2, F3, F4, F5, F6, F7

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 7 footnotes

Footnote F1

Consists of 5,440,619 shares of Class A common stock directly held by Ares X-Energy Holdings LP ("Ares X-Energy Holdings"). The reported securities do not include shares of Class A common stock held by Ares X-Energy Co-Invest LP because the reporting persons have no pecuniary interest in such shares.

Footnote F2

Ares Partners Holdco LLC ("Ares Partners") is the sole member of each of Ares Voting LLC ("Ares Voting") and Ares Management GP LLC ("Ares Management GP"), which are respectively the holders of the Class B and Class C common stock of Ares Management Corporation ("Ares Management"), which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco LLC ("Ares Holdco" and together with each of the foregoing entities, the "Ares Entities."), which is the general partner of Ares Holdings L.P. ("Ares Holdings").

Footnote F3

Ares Holdings is the sole member of Ares X-Energy Capital Investors GP LLC ("Ares X-Energy GP"), which is the general partner of Ares X-Energy Holdings. Each of the Ares Entities, Ares Holdings and Ares X-Energy GP may be deemed to share beneficial ownership of the securities directly held by Ares X-Energy Holdings but each of the foregoing disclaim beneficial ownership of such securities except to the extent of its respective pecuniary interest therein.

Footnote F4

Ares Holdings is the sole member of ACIP Investment Management LLC, which is the sole member of Ares CIP Management LLC, which is the general partner of Ares CIP Management, L.P., which is the managing member of ACIP Investments Pooling LLC (collectively, the "ACIP Entities"). ACIP Investments Pooling LLC - Series 31 ("ACIP Investments") is a registered series of ACIP Investments Pooling LLC. Each of the Ares Entities, Ares Holdings and ACIP Entities may be deemed to share beneficial ownership of the securities directly held by ACIP Investments but each of the foregoing disclaim beneficial ownership of such securities except to the extent of its respective pecuniary interest therein.

Footnote F5

Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over the Board Members' decisions. Each of these individuals expressly disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners, except to the extent of their respective pecuniary interest therein. The principal business office of the Ares Entities, Ares Holdings, and Ares X-Energy GP is c/o Ares Management LLC, 245 Park Avenue, 44th Floor, New York, NY 10167. The principal business office of the ACIP Entities and ACIP Investments is c/o Ares Management LLC, 1800 Avenue of the Stars, Suite 1400, Los Angeles, CA, 90067.

Footnote F6

Consists of (i) 21,762,476 Common Units and an equivalent number of shares of Class B common stock directly held by Ares X-Energy Holdings and (ii) 2,656,280 Common Units and an equivalent number of shares of Class B common stock directly held by ACIP Investments.

Footnote F7

The Common Units of X-Energy Reactor Company, LLC may be redeemed for shares of the Issuer's Class A common stock on a one-to-one basis at the election of the holder. In connection with any such redemption, an equivalent number of shares of the Issuer's Class B common stock will be cancelled upon the exchange of Common Units. The Common Units do not expire.

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