Ryan Cleary of Wickford, England, pleaded guilty to six of eight charges against him, while Davis, of Lerwick, England, admitted to two of the four charges against him.
The duo entered the guilty pleas in Britain's Southwark Crown Court today, according to .
Both Cleary and Davis still face charges of posting unlawfully obtained data on sites such as PasteBin and Pirate Bay.
Two other alleged members of the group, Ryan Ackroyd and an unnamed 17-year-old individual, pleaded not guilty to all charges filed against them, Bloomberg and several British newspapers reported today.
All four are scheduled to be tried in April 2013.