[4] Rosati's has over $211 million in revenue[5] and was founded in 1926 by Saverio Rosati at the corner of Pulaski and Madison in Chicago's west side.

[6] That location closed down and in 1964 reopened in Mount Prospect, IL.

In 1995 Saverio's five sons, Fred, Richard, Al, Bill and Ronald grew the company to be the fourth largest pizza chain in the Chicago area behind Pizza Hut, Domino's and Little Caesars,[6] in 2018 they were listed as number 21 on Pizza Today's list of the top 100 pizzerias.

[5] With an increase of sales in 2019, Rosati's was ranked in the top twenty of Pizza Today's list of "America’s 100 Largest Pizza Chains".

[7] There are two competing restaurant chains using the Rosati's name as the result of "an unfortunate family quarrel".