In an unprecedented collaboration between Anonymous and WikiLeaks, the secret spilling site began leaking Sunday night portions of a massive trove of e-mails from the private intelligence firm Stratfor that Anonymous obtained by hacking the company in December.

WikiLeaks did not mention the source of the reported five gigabytes of e-mails in its press release, but did say it has been working for months with 25 media outlets from around the world to analyze the documents.

The first batch of leaked e-mails purport to show that Stratfor monitored the political prankster group known as The Yes Men on behalf of Dow Chemical, which has been targeted by The Yes Men over the company’s handling of the Bhopal disaster. The e-mails also purport to show Stratfor’s attempt to set up an investment fund with a Goldman Sachs director to trade on the intelligence Stratfor collects, as well as give insight into how the private intelligence firm acquires, and sometimes pays for, information.

Stratfor, somewhat akin to a privatized CIA, sells its analyses of global politics to major corporations and government agencies.

Members of Anonymous with direct knowledge of the hack and transfer of data to WikiLeaks told Wired that the group decided to turn the information over to WikiLeaks because the site was more capable of analyzing and spreading the leaked information than Anonymous would be.

“WikiLeaks has great means to publish and disclose,” the anon told Wired. “Also, they work together with media in a way we don’t.”