The premier met with representatives of 28 companies under the US-Asean Business Council (USABC) at the Foreign Affairs Ministry. He also also spoke to another 11 USABC members via video, said government spokesman Anucha Burapachaisri.
Prayut hailed the EEC as a key engine driving the Thai economy.
He also told US company representatives that the government was focusing on boosting public health security and economic recovery from the impact of Covid-19.
The council's president, Alexander C Feldman, praised the government for its effective control of the outbreak, which he said was helping to support a favourable investment climate.