The AP reports that despite pledges to the contrary, the Democratic National Convention relied on at least $5 million in corporate donations.

Reports filed Wednesday with the Federal Election Commission show the convention’s host committee, Charlotte in 2012, raised $24 million, well short of its $36.7 million fundraising goal.

To help make up for the shortfall, committee officials spent $5 million raised directly from corporations to rent the cavernous basketball arena used as the convention hall. They spent nearly $8 million more from a line of credit provided by Charlotte-based Duke Energy, the nation’s largest electricity provider.

Democrats also pledged to regularly release the names of convention contributors, but some donors were kept secret until this week, when federal disclosure documents were filed.