Heard had been seeing the billionaire inventor since her high-profile split with actor Johnny Depp.
But the couple had recently decided their careers were traveling in different directions, according to Us Weekly.
“The timing wasn’t good for them,” said a source quoted by the magazine. “He’s super busy and works all the time. Amber is filming [‘Aquaman’] in Australia until October. She’s in no position to settle with him. She feels her career is just starting.”
The two met in 2013 and started dating after the 31-year-old Heard filed for divorce with Depp after a 15-month marriage.