Which of New Jersey based kosher food company became a public corporation in 1923?
Streit's:  It holds about 40 percent of the United States matzo market with its major competitor, New Jersey based Manischewitz. Manischewitz:  Founded in 1888, it became a public corporation in 1923 and remained under family control until 1990, when it was bought out by a private equity firm.
Manischewitz