<ul data-eligibleForWebStory="true">German defence start-up Helsing has raised 600 million euros ($693.30 million) in its latest investment round, led by Spotify founder Daniel Ek.The investment round has increased Helsing's value to $12 billion, positioning it among the top five private tech companies in Europe.Prima Materia, an investment company by Daniel Ek and Spotify investor Shakil Khan, led the investment round and doubled its investment in Helsing.Other investors in the round included Lightspeed Ventures, Accel, Plural, General Catalyst, and SAAB.Helsing, based in Munich, specializes in AI software and is expanding to produce drones, aircraft, and submarines.The start-up aims to capitalize on increased government defense spending due to rising geopolitical tensions.