A securities fraud class action suit against Equifax Inc. and its officers related to the massive 2017 data breach that exposed the personal information of over 148 million Americans was partially dismissed Jan. 28.

The claims against three Equifax corporate officers were dismissed, but the claims against the company itself and its former CEO survived.

A class of investors that bought Equifax securities in 2016 and 2017 sued the credit reporting agency and corporate officers alleging they made false or misleading statements and omissions about the breach. The investors claim that these statements and omissions artificially inflated the value of...