York Space Systems Raises $629 Million in Upsized US IPO

York Space Systems Inc. raised $629 million in its upsized US initial public offering, pricing its shares at the top of the marketed range.

The space and defense firm sold 18.5 million shares for $34 each, according to a statement. York had marketed 16 million shares for $30 to $34 each. The offering was multiple times oversubscribed, people familiar with the matter have said.

The IPO price gives the company a market value of about $4.3 billion, based on outstanding shares listed in its filings.

York’s move to go public comes amid intense interest in the defense sector. President ...