The Association of National Advertisers, whose members control $250 billion in ad spending, will release the results of a wide-ranging investigation into whether ad-buying agencies are pocketing undisclosed “rebates” from media companies, a source told The Post.

The report from the two companies hired to conduct the probe could be released as soon as Thursday, the source said. The ANA commissioned K2 and Ebiquity to investigate how clients’ money is being spent by their agency partners back in October.

Read the full New York Post article here.