Optum and Change Healthcare are extending their merger agreement to the end of the year, ahead of their scheduled trial starting August 1.

The new merger deadline is December 31.

As part of the extension, Optum will pay a $650 million fee to Change Healthcare in the event the merger is unable to be completed because of the court’s decision. Change Healthcare will pay a special cash dividend of $2 per share to its shareholders at or about the time of the closing.