The request was made in a filing on Wednesday. The subpoenas would require their recipients to testify in the U.S. District Court in Alexandria on July 25, when Manafort’s trial in Virginia is set to begin.
No further information was provided in the filing, and a spokesman for the special counsel declined to comment on the request.
The request comes roughly a month after Mueller filed a request for 150 blank subpoenas.
Manafort is facing numerous charges, including tax evasion, bank fraud and failing to report foreign bank accounts. He has pleaded not guilty to the charges and has sought to delay the trial and move the venue to Roanoke from Alexandria.
Manafort has been held in the Northern Neck Regional Jail in Warsaw, Va., since last month, when a federal judge in Washington, where he is facing separate charges, revoked his bail in response to new charges that the former Trump campaign chair sought to sway the testimony of two witnesses in his trial.