Amazon-Backed X-Energy Climbs 27% After $1.02 Billion US IPO (1)

X-Energy Inc. shares closed 27% above their IPO price, after the nuclear energy firm raised $1.02 billion in an upsized US initial public offering.

Shares of the Rockville, Maryland-based company backed by Amazon.com Inc. ended their first trading session at $29.20 each on Friday, versus an IPO price of $23. The listing priced above the marketed $16 to $19 range.

The trading gives X-Energy a market value of $11.6 billion based on the outstanding shares listed in its filings. The IPO ended more than 15 times oversubscribed, people familiar with the matter have said.

“This is a validation of ...