How The Quikrete Family Made Billions Selling Concrete In A Bag

ByMatt Durot,

Forbes Staff.

F

or decades, DIYers and construction pros have picked up yellow and red bags of Quikrete concrete mix from the shelves of America’s big box stores like Home Depot and used it for everything from anchoring mailboxes to patching driveways and making outdoor benches and steps. That in turn has generated billions of dollars for the little-known company and the little-known family behind the brand.

But their time in the shadows may have come to an end. In February 2025, the privately-held building materials firm made a big splash when it paid $11.5 billion to acquire publicly traded competitor Summit Materials. The deal, which Forbes estimates boosted Quikrete’s revenue by around 50% to an estimated $12 billion, helped propel the Atlanta-based company onto Forbes’ first ever ranking of America’s Largest Family Businesses, published this week, at No. 43. Based on Forbes’ estimates, Quikrete is the 17th most valuable privately-held family business in America, making its founding Winchester family one of the country’s richest clans, worth an estimated $18 billion, thanks to their estimated 100% ownership of Quikrete.