BENGALURU, Jan. 1 -- Cognizant Technology Solutions Corp is facing multiple class action lawsuits in the US alleging that its healthcare claims processing unit, TriZetto, failed to make timely disclosures after a cyberattack that allegedly went undetected-or undisclosed-for nearly a year.

According to the petitioners, the breach impacted at least 100 individuals across several US states, who said they lost personal information held by TriZetto. At least one complainant alleged that the Nasdaq-listed company was aware of the breach but still did not inform affected parties, a claim that could raise concerns for investors.

"In or about November 2024, hackers gained access to Defendants' (Cognizant) computer network and accessed protected ...