The investments could create some 500 jobs, Szijjártó said.
Szijjártó arrived in Dallas on Sunday evening at the start of an official visit to the United States.
On Monday, he met with executives from American Airlines for talks on relaunching a direct flight between Hungary and the United States.
Szijjártó is travelling with deputy state secretary for European and American ties Kristóf Altusz, government commissioner for managing the impact of the Russian embargo Gyula Budai, and Hungarian Investment Promotion Agency (HIPA) chairman Róbert Ésik.
Today, the minister travels to New York, where he will participate at a round table talk with executives of Coca-Cola, Lilly, Pfizer and Warburg-Pincus, among other companies. He is also scheduled today to formally announce the establishment of the American-Hungarian Business Council, MTI said.