The request covers 75 potential subpoenas. In legal cases, two subpoenas are issued for each witness with one going to the individual and a second sent to the court.
A blank subpoena allows the government to fill in the name of a witness after it is served.
Mr. Mueller revealed little about the subpoenas in the two-page filing, saying only that the recipient must appear at the federal courthouse in Alexandria, Virginia on July 25 to testify.
Mr. Manafort’s Virginia trial for money laundering, tax evasion and other charges is scheduled to start on July 25.
Mr. Mueller’s latest request is separate from the 70 blank subpoenas he sought in May.
Mr. Manafort is next due in court on Friday in Washington, DC., where he also is facing charges. Last week, Mr. Mueller indicted Mr. Manafort on obstruction charges, accusing him of tampering with potential witnesses.