Jane Street Group, LLC and two of its subsidiaries filed an amended beneficial ownership statement with the SEC on November 6, 2026, disclosing aggregate holdings of 8,161,276 shares of X-Energy, Inc. Class A common stock as of September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: Jane Street Group, LLC reported beneficial ownership of 8,161,276 shares, representing 2.8% of X-Energy's Class A common stock.
  • Subsidiary breakdown: Jane Street Capital, LLC reported 726,806 shares (0.3% of class); Jane Street Global Trading, LLC reported 7,434,470 shares (2.6% of class).
  • Voting and dispositive power: All reported shares are held with shared voting power and shared dispositive power; sole voting and sole dispositive power are each listed as 0.
  • Triggering event date: The event requiring this filing occurred on September 30, 2026.
  • Certification language: The filers certified that the securities "were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer."
  • Signatory: Jeremy Kahn signed as Authorized Signatory for all three reporting entities on November 6, 2026.

Jane Street Entities Disclose Combined Position in X-Energy Class A Shares

According to the filing, X-Energy, Inc. is the named issuer, with its principal executive offices listed at 251 Little Falls Drive, Wilmington, Delaware, 19808. The company's Class A common stock carries a par value of $0.0001 per share and is identified by CUSIP number 98386P102. X-Energy operates in the nuclear energy sector, and its shares trade on NASDAQ under the ticker XE, as indicated on the filing's cover.

The amendment was filed jointly by three Delaware-organized entities, all headquartered at 250 Vesey Street, 3rd Floor, New York, NY 10281. Jane Street Group, LLC is classified as a holding company (type HC) and is identified as the parent of the two subsidiaries named in Item 7: Jane Street Capital, LLC, classified as a broker-dealer (type BD), and Jane Street Global Trading, LLC, classified as type OO. The parent-level figures consolidate the positions held across those subsidiaries, the filing disclosed.

Item 5 of the filing states "Ownership of 5 percent or less of a class," confirming the aggregate position falls below the 5% threshold. Item 6 indicates that ownership of more than 5% on behalf of another person is "Not Applicable," and Item 8 notes that identification of group members is likewise "Not Applicable." All three entities reported zero sole voting power and zero sole dispositive power, with all 8,161,276 shares at the parent level held on a shared basis, according to the disclosure.

What Was Disclosed

Three Jane Street entities filed an amended beneficial ownership statement covering X-Energy, Inc. Class A common stock. The parent, Jane Street Group, LLC, reported 8,161,276 shares (2.8% of class) as of September 30, 2026, held entirely through shared voting and dispositive power across its two subsidiaries.