Washington (CNN) Acting Attorney General Matthew Whitaker revised his financial disclosure forms five times after being appointed to the top Justice Department role earlier this month, according to the forms, which were released Tuesday.

Revisions to disclosure filings are not uncommon, but the release of Whitaker's forms comes amid pressure from government watchdog groups who raised concerns in recent days about why their requests for the documents had gone unfulfilled.

The forms show that in the months before then-Attorney General Jeff Sessions hired him as chief of staff in 2017, Whitaker was paid hundreds of thousands of dollars in salary from a conservative oversight group he founded in 2014.

Financial records show that The Foundation for Accountability and Civic Trust, or FACT, received nearly all of its funding from a group called DonorsTrust, whose contributors are mostly anonymous but are known to include major Republican donor Charles Koch.

Whitaker was paid a total of $904,000 over 2016 and most of 2017, according to his first disclosure form.