About one-third of the 300 largest companies in the country voluntarily disclosed gifts to trade associations and other politically engaged nonprofits in 2012. We used those disclosures to make more than $173 million in previously dark money searchable.
Source: Center for Public Integrity review of corporate filings and IRS data
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Julie Patel, Erin Quinn, Sarah Whitmire, Ben Wieder and Adam Wollner contributed to this database.
Editor's note, Jan. 29, 2014, 5:15 p.m.: This item has been updated to reflect new data provided by Exelon Corp. Company officials now say the disclosures originally reviewed by the Center for Public Integrity contained inaccurate information, which caused about $13 million in payments to trade associations to be double-counted. See here for more.