The Google Transparency Project is a Washington, DC group that’s laser-focused on letting Americans know about Google’s lobbying efforts. To get its message out, GTP has worked with journalists at Re/Code and The Intercept, which have run stories about Google’s many visits to the White House, the prevalence of ex-Googlers in the US Digital Service, and other links.

What wasn’t known, until today, is who was paying the bills for research by the “nonprofit watchdog” group. “The folks running the Google Transparency Project won’t say who is paying for it, which is odd for a group devoted to transparency,” noted Fortune’s Jeff John Roberts, one of many journalists who the group reached out to in April.

Today, Roberts has published a followup, confirming that based on a tip, he found at least one funder—Oracle. That’s the same company that lost a major copyright trial to Google and continues to spar with the search giant in court.