The Pulitzers, journalism's highest honour, will be announced today. Revelations about the spy programs were first published in The Guardian and The Washington Post in June.
The disclosures showed that the National Security Agency has collected information about millions of Americans' phone calls and emails based on its classified interpretations of laws passed after the 2001 terrorist attacks.
The documents revealed that telephone and Internet companies such as Verizon, AT&T, Apple, Microsoft and Facebook have been cooperating with the government on these national security programs.
The public was outraged to learn of the dragnet surveillance. And the disclosures have led to proposed overhauls of some US surveillance programs, changes in the way the government spies on foreign allies, additional disclosures to defendants in some terrorism cases and demands from private companies to share details about government cooperation with their customers and shareholders.
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In January, President Barack Obama called for some immediate changes to the phone records collection program, including that a secret court approve all of the searches the NSA does within the database before the search takes place.
He also limited the number of phone records it could search to phone numbers a terrorist called and the numbers who those people called.
Last month, Obama called for an end to the government's collection and storage of the records and said his administration would work with Congress to come up with a new program.