April 15 (Reuters) - Amazon ( AMZN )-backed X-Energy said on Wednesday it was targeting a valuation of up to $7.51 billion in its initial public offering in the United States.

The Maryland-based nuclear reactor developer is seeking up to $814.3 million by offering roughly 42.9 million shares priced between $16 and $19 apiece.

J.P.Morgan, Morgan Stanley, Jefferies, Moelis & Co, ​Cantor Fitzgerald, Guggenheim Securities, Nomura Securities and TD Securities are among the underwriters for ​the IPO.

It will list its Class A common stock ​on the Nasdaq under the symbol "XE".