The biggest media company that has leaked "intelligence" agency information to besmirch Donald Trump has been the Washington Post.
As former Post reporter John Hanrahan told Alternet in 2013:
“It’s all so basic. Readers of the Washington Post, which reports frequently on the CIA, are entitled to know — and to be reminded on a regular basis in stories and editorials in the newspaper and online — that the Post’s new owner Jeff Bezos stands to benefit substantially from Amazon’s $600 million contract with the CIA. Even with such disclosure, the public should not feel assured they are getting tough-minded reporting on the CIA. One thing is certain: Post reporters and editors are aware that Bezos, as majority owner of Amazon, has a financial stake in maintaining good relations with the CIA — and this sends a clear message to even the hardest-nosed journalist that making the CIA look bad might not be a good career move.”