The German defense industry is coming together: What the tank supplier's brilliant stock market debut means. The Renk large gearboxes are used in tanks, which are experiencing a boom in the wake of global armament.

The issue was increased by 50 million euros at the last minute due to high demand. German fund companies are still shying away from defense stocks because of their strict ESG guidelines, a banker said. “But Germany needs to invest more in defense, and the always skeptical German investors are now thinking more about it,” he said.