[1][2] The company eventually became one of the largest regional brands in the United States producing over 40 varieties of pasta.

The company opened a pasta factory at 473 Kent Avenue in Brooklyn using an extruder made by I. DeFrancisci & Son, now called DEMACO.

American Italian Pasta Company eventually acquired the La Rosa brand.

In 1959, La Rosa purchased Tharinger Macaroni Company, makers of White Pearl brand, and acquired their factory at 3372 North Holton Street, Milwaukee, Wisconsin.

Tharinger was the successor to Lorenz Bros Macaroni Company, the original makers of White Pearl brand.