According to insiders, Elon Musk is on the home stretch of the $43 billion takeover of Twitter.
A deal is imminent and could be announced as early as Monday, several people familiar with the matter told Reuters.
The US short message service is ready to accept the Tesla boss's offer of $ 54.20 per share.
The board has yet to meet to recommend the transaction to Twitter shareholders.
However, failure at the last minute is still possible.
Both parties had started negotiations on Monday night.
According to insiders, some shareholders wanted to get a higher price.
Musk had described his offer as his best and last.
The shares closed at $48.93 on Friday.
Twitter and Musk, who according to Forbes are the richest man in the world with assets of $265 billion, were initially unavailable for comment.
According to insiders, Twitter is currently not allowed to solicit any further offers.
Nevertheless, it would be possible for the US company to accept a third-party offer if a termination fee is paid to Musk.
Musk, who is followed by more than 80 million people on Twitter, now holds more than nine percent of the Internet network.
He has announced his intention to delist Twitter and make it a "real" platform for freedom of expression.