If Pixar's board, which is led by Steve Jobs, accepts the offer, an announcement regarding the deal could be possible Tuesday, The Los Angeles Times reported.
Disney reportedly is offering about $59 a share for the company that pioneered computer animation with such blockbusters as "The Incredibles," "Finding Nemo" and the "Toy Story" films.
If Pixar agrees, it would make Jobs the top Disney shareholder. Analysts openly wonder about the feasibility of Jobs, not known as a passive investor, and Disney chief executive Bob Iger getting along.
Jobs and Eiger's predecessor, Michael Eisner, were famously incompatible and eventually broke their companies' once-lucrative relationship.
"It may be a fairly lengthy adjustment process," said independent media analyst Harold Vogel. "Steve Jobs is known to be quite active in everything he does -- he won't sit back quietly."