the indictment mentions 3 unnamed co-conspirators.

we know roger stone and political operative chuck johnson communicated with guccifer. chuck johnson has been proven to actually have received stolen material directly from guccifer.

roger stone is looking likely to be indicted.
https://abcnews.go.com/Politics/mueller-team-pushing-information-roger-stone-wikileaks-sources/story?id=56509716

both of them are real cool with matt gaetz.
https://pbs.twimg.com/media/DbQFxUbX0AAI9Ve.jpg

gaetz even took chuck johnson to the last state of the union address.
https://www.thedailybeast.com/florida-congressman-invited-infamous-troll-chuck-johnson-to-trumps-state-of-the-union