Hahn Bro's, Inc. founded in Muscatine, IA, primarily as a farming operation by the Hahn family.

Builders Sand & Gravel founded by Hans Koos in Davenport, IA.

Builders Sand & Gravel is a key material supplier for the construction of the Rock Island Arsenal.

W.G. Block is founded in Davenport, IA as a coal and Ice supplier.

Henry Hahn builds a sand plant on Muscatine Island, the operation fails within a few years.

Hahn Bro's, Inc. is the largest supplier of cabbage to the U.S. military in WWI.

Robert Hahn designs and builds the world's first roller bearing mounted centrifugal sand pump. He declines to get a patent. Hahn re-enters the sand business.

Builders Sand & Cement acquired by Miss Ethel Delarue.

Builders enters the ready mix concrete industry.

Edwards Ready Mix founded in Geneseo, IL.

Robert Hahn and his son Tom set up Hahn's first ready mix concrete batch plant in Muscatine.

After Miss Delarue's passing, Builders is sold to Alter Corp.

Tom Hahn sets up Hahn's first automated batch plant in Muscatine.

Hahn Ready Mix acquires Grunder & Sons Ready Mix with locations in West Liberty, Wilton, Durant and Walcott.

Hahn acquires Mercer County Ready Mix in Aledo, IL.

Alter Corp sell Builders Sand & Cement to Ira Weindruch.

Hahn sets up their first portable batch plant to service the construction of the IPSCO Steel Plant in Blue Grass, IA. The project consisted of over 90,000 cubic yards of concrete.

Builders Sand and Cement acquired by Brian Hahn.

W.G. Block Co. and Edwards Ready Mix acquired by Brian Hahn.

Block Ready Mix Group And Builders Sand & Cement merged into Hahn Ready Mix.

Hahn Ready Mix is selected to supply the concrete for the new I-74 Bridge in the Quad Cities. Eventually the winner of the 2023 ACI International Excellence in Concrete Infrastructure Award, Hahn supplied over 215,000 cubic yards to the project over four and a half years.