Almost half of the U.K.’s top companies are unaware of how U.S. anti-corruption legislation affects them, according to new research.

Forty-six percent of respondents to a survey of more than 100 FTSE 350 companies conducted by accountancy firm KPMG said that they while they did business in the U.S. they either thought that they were not subject to the United States’ Foreign Corrupt Practices Act or did not know if it would affect them.