"People familiar with the matter" gave the story to the WSJ reporter, so likely people that were in some of the meetings. The WSJ story is more comprehensive:

"People familiar with the matter" gave the story to the WSJ reporter, so likely people that were in some of the meetings. The WSJ story is more comprehensive: https://archive.is/tyZq2#selection-6231.180-6234.0 https://archive.is/tyZq2#selection-6231.180-6234.0