(Reuters) – Equifax Inc, a provider of consumer credit scores, said on Thursday that personal details of as many as 143 million U.S. consumers were accessed by hackers between mid-May and July, in what could be one of the largest data breaches in the United States.
The company’s shares fell nearly 19 percent in after-market trading as investors reacted to possible consequences of the exposure of sensitive data of nearly half of the U.S. population.