A Ukrainian drone technology startup saw the most explosive U.S. stock market debut in the last year during its first day trading on Nasdaq. Shares in Swarmer, whose software enables single pilots to control hundreds of drones at once, soared over 700% before closing at $31 on Tuesday. The company, based in Austin, Texas, but founded in Ukraine, has been used widely by the Ukrainian military since 2024. Erik Prince, the founder of the U.S. private military contractor Blackwater, joined Swarmer