Firefly Aerospace soared in its public market debut Thursday, beginning trading at $70, over 55% higher than its IPO price.

Space technology company Firefly Aerospace Inc. successfully debuted on the Nasdaq today and saw its share price close regular trading up 34% from its initial public offering price.

Medical technology firm Heartflow said on Thursday it had raised $316.7 million in its U.S. initial public offering, setting the stage for its Nasdaq debut in another test of investor appetite for ...