One indictment unsealed today charged three people in the computer breach against the huge bank and other organizations. The other person was charged in an indictment for a bitcoin scheme to launder the proceeds of the hackers.
The bank revealed last year that a hack had compromised data on 76 million household customers and seven million businesses, including their names, email addresses and telephone numbers.
The indictment unsealed in New York federal court said the three defendants charged in the hacking led a "sprawling cybercriminal enterprise" which hit at least a dozen firms including banks and brokerages.
"We appreciate the strong partnership with law enforcement in bringing the criminals to justice," bank spokeswoman Patricia Wexler said in a statement.
"As we did here, we continue to cooperate with law enforcement in fighting cybercrime."
Other firms previously identified as victims included the Dow Jones media group and online brokers ETrade and Scottrade.
Two Israeli nationals -- Gery Shalon and Ziv Orenstein -- and US citizen Joshua Samuel Aaron were charged with multiple counts of fraud, conspiracy and other charges related to the hack.
In July, Shalon and Orenstein were arrested in Israel, and US officials detained Anthony Murgio, who was charged with operating an illegal money transfer service using the bitcoin virtual currency that helped launder the profits from the scheme.
Murgio was accused in a separate indictment of operating the Coin.Mx service that was used to conceal the gains of the hackers.
Aaron's whereabouts were not immediately known. In July, officials said he was believed to be in Russia.