Quanta Services Inc is trading 4.2% up at $732.01 today. - The advance is significantly driven by a new joint venture, HYOSUNG HICO BREAKER, LLC, with Hyosung Heavy Industries to produce high-voltage circuit breakers in Pennsylvania, announced on June 22, 2026. - This positive momentum is also sustained by strong Q1 2026 earnings reported on April 30, 2026, and a $1 billion stock repurchase program announced on May 22, 2026.