Summit Materials is a leading construction materials company that supplies aggregates, cement, ready-mix concrete, asphalt, and paving services. They operate a network of quarries, cement plants, and distribution facilities across the United States and Canada. Summit Materials serves a wide range of customers, including contractors, builders, and infrastructure developers, providing essential materials for various construction projects, including roads, bridges, buildings, and more.

The stock of Summit Materials, ticker symbol SUM, is currently in an uptrend and has just completed a long-term breakout. 

A breakout occurs when the stock price moves above a significant resistance level, indicating a potential shift in market sentiment and a breakout from a period of consolidation. Completing a long-term breakout is often seen as a bullish signal, suggesting that the stock may have the potential for further upward movement.