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Quikrete Owner Family Estimated at $18 Billion After 2025 Acquisition
The Winchester family built Quikrete from a small Ohio firm into a major packaged-concrete supplier. In February 2025 the company paid $11.5 billion for Summit Materials, increasing estimated annual revenue to $12 billion.
May 24, 8:30 AM·1m read1 source
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U.S. retailers. Forbes estimates the family’s 100 percent ownership is worth $18 billion, placing the firm at No. 43 on its ranking of America’s largest family businesses. Gene Winchester started the business in 1951 after developing Gemaco Quikrete, an early packaged dry-concrete product.
, in 1965 and renamed it Quikrete. The company expanded distribution across nearly 50 markets in the United States and Canada by the late 1980s.
Winchester’s three sons, Jim, Jack and Dennis, assumed leadership in 1981 and moved headquarters to Atlanta. Jim Winchester served as chief executive until at least 2015 and remains on the three-person board with his brothers. Non-family executive Will Magill has been chief executive since around 2020.
In 1985 the company began national television and print advertising featuring actor Don Knotts. Quikrete products are now used for small construction and repair jobs that do not require ready-mix delivery.
5 billion. Forbes estimates the purchase increased company revenue by about 50 percent to $12 billion. The family has kept a low public profile and declined interview requests for this article. Dennis Winchester donated $103,000 to the Trump 47 Committee in 2024, according to Federal Election Commission records.
The brothers have also contributed to community groups and their alma mater, John Carroll University.
