On Friday, Moody's downgraded Quikrete to Ba3 from Ba2, citing an increase in leverage and the execution risks involved in integrating with Summit, which has 7,000 employees and acquired Argos USA ...

Quikrete, the largest cement maker in the U.S., announced Monday plans to buy Summit Materials Inc. for $11.5 billion ahead of a potential rise in construction activity as the cost of financing ...