The US Dept. of Injustice press release actually names it a ‘Second Superceding Indictment’ in this June 24, 2020 Press Release: “WikiLeaks Founder Charged in Superseding Indictment:

New Allegations Assert Assange Conspired With “Anonymous” Affiliated Hackers, Among Others  [including LulzSec]

A federal grand jury returned a second superseding indictment today charging Julian P. Assange, the founder of WikiLeaks, with offenses that relate to Assange’s alleged role in one of the largest compromises of classified information in the history of the United States.