PWR is trading at $707.92, down 4.4% in pre-market, as the stock undergoes a partial pullback from its recent sharp advance amid a broadly weaker U.S. equity backdrop. - The decline follows a 5.4% gain to $740.14 on June 22, 2026, a move driven by company-specific catalysts. - On June 22, Quanta Services announced a new joint venture with Hyosung Heavy Industries to produce high-voltage circuit breakers and raised its full-year earnings guidance. - Additionally, the company authorized a $1 billion stock repurchase program.