STOCK TITAN

X-Energy (NASDAQ: XE) discloses officer’s initial share and option stakes

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
3

Rhea-AI Filing Summary

X-Energy, Inc. reported the initial equity holdings of officer Steven L. Miller. He directly holds 948,747 shares of Class A Common Stock, including 326,640 shares of restricted stock, indicating a substantial existing ownership stake rather than a new market transaction.

Miller also holds a stock option covering 254,740 underlying shares of Class A Common Stock at an exercise price of $23.00 per share, expiring on April 24, 2036. The option is vested as to 82,332 underlying shares, with additional tranches vesting in annual installments beginning in 2026 and 2027.

Positive

  • None.

Negative

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Insider MILLER STEVEN L
Role See Remarks
Type Security Shares Price Value
holding Stock Option -- -- --
holding Class A Common Stock -- -- --
Holdings After Transaction: Stock Option — 254,740 shares (Direct, null); Class A Common Stock — 948,747 shares (Direct, null)
Footnotes (1)
  1. Includes 326,640 shares of restricted stock. The stock option is vested as to 82,332 of the underlying shares. The stock option vests as to 75,883 of the underlying shares in two substantially equal annual installments beginning on January 1, 2027, and as to 96,525 of the underlying shares in four substantially equal annual installments beginning on December 23, 2026.
Direct common shares 948,747 shares Class A Common Stock held directly after reported holdings
Restricted stock 326,640 shares Included within reported Class A Common Stock holdings
Stock option underlying shares 254,740 shares Underlying Class A Common Stock for option position
Option exercise price $23.00 per share Exercise price for stock option on Class A Common Stock
Option expiration April 24, 2036 Expiration date of reported stock option
Currently vested option shares 82,332 shares Portion of underlying shares vested under stock option
Future vesting tranche 75,883 shares Underlying shares vesting in two equal annual installments from Jan 1, 2027
Future vesting tranche 96,525 shares Underlying shares vesting in four equal annual installments from Dec 23, 2026
restricted stock financial
"Includes 326,640 shares of restricted stock."
Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.
Stock Option financial
"The stock option is vested as to 82,332 of the underlying shares."
A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.
underlying shares financial
"The stock option is vested as to 82,332 of the underlying shares."
vested financial
"The stock option is vested as to 82,332 of the underlying shares."
annual installments financial
"vests as to 75,883 of the underlying shares in two substantially equal annual installments"
SEC Form 3
FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:3235-0104
Estimated average burden
hours per response:0.5
1. Name and Address of Reporting Person*
MILLER STEVEN L

(Last)(First)(Middle)
C/O X-ENERGY, INC.
530 GAITHER ROAD, SUITE 700

(Street)
ROCKVILLE MARYLAND 20850

(City)(State)(Zip)

UNITED STATES

(Country)
2. Date of Event Requiring Statement (Month/Day/Year)
04/24/2026
3. Issuer Name and Ticker or Trading Symbol
X-Energy, Inc. [ XE ]
3a. Foreign Trading Symbol
5. If Amendment, Date of Original Filed (Month/Day/Year)
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
See Remarks
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock948,747(1)D
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year)3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (2)04/24/2036Class A Common Stock254,740$23D
Explanation of Responses:
1. Includes 326,640 shares of restricted stock.
2. The stock option is vested as to 82,332 of the underlying shares. The stock option vests as to 75,883 of the underlying shares in two substantially equal annual installments beginning on January 1, 2027, and as to 96,525 of the underlying shares in four substantially equal annual installments beginning on December 23, 2026.
Remarks:
Executive Vice President, Chief Legal and Administration Officer. Exhibit 24 - Power of Attorney.
/s/ Elizabeth Petrone, Attorney-in-Fact04/24/2026
** Signature of Reporting PersonDate
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 5 (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 3: SEC 1473 (03-26)

FAQ

What insider holdings does XE officer Steven L. Miller report on this Form 3?

Steven L. Miller reports holding 948,747 shares of X-Energy Class A Common Stock and a stock option over 254,740 underlying shares. These positions reflect his initial beneficial ownership as an officer, rather than new purchases or sales in the market.

How many restricted XE shares are included in Steven L. Miller’s holdings?

Miller’s reported 948,747 Class A Common shares include 326,640 shares of restricted stock. Restricted stock typically vests over time or upon meeting conditions, aligning a portion of his stake with ongoing service or performance requirements at X-Energy.

What are the key terms of Steven L. Miller’s X-Energy stock option?

Miller holds a stock option tied to 254,740 underlying Class A shares at an exercise price of $23.00 per share. The option expires on April 24, 2036, providing long-dated equity exposure linked to X-Energy’s future performance and his continued service.

How much of Steven L. Miller’s XE stock option is currently vested?

The filing notes that 82,332 of the underlying shares under Miller’s stock option are currently vested. This means he can exercise that vested portion subject to plan terms, while the remaining unvested portion will vest over future years if conditions are met.

What is the vesting schedule for Steven L. Miller’s remaining XE stock options?

The option vests as to 75,883 underlying shares in two substantially equal annual installments beginning January 1, 2027, and 96,525 underlying shares in four substantially equal annual installments beginning December 23, 2026. This structure encourages longer-term retention and alignment.

Does this XE Form 3 show insider buying or selling activity?

No, the Form 3 reflects Miller’s initial beneficial ownership in X-Energy securities, not new trades. It lists existing common stock and option holdings, with transaction summaries showing no buy or sell entries, only holding information and vesting details for his equity awards.