"As of February 24, ICIJ is a fully independent nonprofit news organization, still headquartered in Washington and still committed to doing the best cross-border investigative reporting in the world," its statement said.
"We believe this new structure will allow us to extend our global reach and impact even farther and build on the lessons we've learned and the successes we've enjoyed."
The statement added that investigative journalism remains an important endeavor and that "today, more than ever, some stories are too big, too complex and too global to be tackled by lone-wolf investigative reporters or even individual news organizations."
The center's in-house staff totals less than 15, but works with nearly 200 affiliated journalists from more than 60 countries, and on occasion with journalists from other news organizations.
"We are fortunate to be living in a golden era of information that can empower and strengthen investigative journalism," the statement said.
"We believe investigative reporting ought to be taking better advantage of technology and the new abundance of information. Despite all the problems that mainstream journalism faces these days, we see this as a time of opportunity."
The New York Times reported last year that the ICIJ was being constrained by a financial squeeze at the Center for Public Integrity.
CPI was founded in 1989 and won a Pulitzer Prize in 2014 for its report on how doctors and lawyers, working at the behest of the coal industry, helped defeat the benefits claims of miners suffering from black lung disease.