Space and defense technology company Firefly Aerospace on Friday filed for an initial public offering in the United States. The U.S. IPO market is witnessing renewed vigor as investors return after months of sluggish activity triggered by trade policy uncertainty under President Donald Trump earlier this year. Texas-based Firefly designs and manufactures small and medium lift launch vehicles, lunar landers and orbital transfer vehicles, leveraging common flight-proven technologies. It will list on the Nasdaq under the symbol "FLY". Goldman Sachs, JPMorgan, Jefferies and Wells Fargo are the lead underwriters for the offering.