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Amazon-backed X-energy raises over $1bn in upsized IPO

economy-finance · 2026-04-24

X-energy, a nuclear technology startup supported by Amazon, successfully secured more than $1 billion through an expanded initial public offering. The company, based in Rockville, Maryland, offered 44.3 million shares priced at $23 apiece, significantly exceeding its anticipated range of $16 to $19.

Key facts

  • X-energy raised over $1 billion in its IPO.
  • The company sold 44.3 million shares.
  • Shares priced at $23 each.
  • The marketed range was $16 to $19.
  • X-energy is based in Rockville, Maryland.
  • Amazon is a backer of X-energy.
  • The IPO was upsized.

Entities

Institutions

  • X-energy
  • Amazon

Locations

  • Rockville
  • Maryland

Sources