The Daily Beast:

ABC News President Ben Sherwood provided an important boost, having lunch with Couric and making clear he wanted her to contribute to his news division as well.
The result, people familiar with the situation say, is that Couric is close to signing with ABC, and while the final negotiating points haven’t been resolved, an announcement is likely in early June. The only other contender at this point is CBS Corp., which has formally withdrawn its offer but—under a contract that expires June 5—retains the right to match ABC’s final deal.
ABC has given Couric’s team the full-court press, starting with the L.A. contingent of Iger, who met with her in New York, and ABC President Anne Sweeney. The courtship continued in Manhattan, where Sherwood, a longtime fan who recently took over the news division, is doing his best to make Couric feel wanted.