The document by the NIA was filed in the court of Special Judge.
Pragya is under judicial custody at the moment.
Apart form her, the other accused include Rajendra Choudhary, Lokesh Sharma, Jitendra Sharma, NIA said in a press release.
“The charge sheet also cites supplementary evidence against Pragya Singh Kushwaha for her role in the crime, since she has been charged earlier in the chargesheet by Madhya Pradesh police in 2011″, it said, as per PTI.
Joshi was shot dead on December 29, 2007 near Dewas, about 150km from here.
Pragya, who is ailing and undergoing treatment at a city hospital, is also an accused in the 2008 Malegaon blast case.
According to NIA, Rajendra and Lokesh had fired at Joshi. Jitendra had arranged the murder weapon (pistol) and given it to Balbir.
Earlier reports were also doing the rounds Pragya had got Joshi eliminated due to his sexual advances towards her.
As per a newspaper report, the Sadhvi was wary of his sexual advances and was scared that the plan for Malegaon blasts would leak.
According to the NIA, Rajendra and Lokesh killed Joshi on the night of December 29, 2007 in Dewas.
The pistols and magazines were procured and hidden by Jitendra Sharma and Balbir Singh, according to the report which will be filed next week.