In the Ultimate Marvel Universe, Mole Man was a Baxter Building scientist named Dr. Arthur Molekevic. Nicknamed Mole Man by the students, he was fired due to his experiments in creating life after being warned off. He claimed the files as his own but was told by the governmental officials firing him, which included Sue and Johnny's father, Dr. Franklin Storm, that everything he created was the property of the United States government. He soon disappeared into caverns with his Moloids. These caverns contained advanced technology, which Mole Man claimed had been built by an ancient race. Parts of the caverns were also under the Baxter Building itself, which provided Mole Man with links into their security system. His ability to spy on the team fostered his delusion that he was a father figure to them. When the Fantastic Four gained their powers and were transported across the world, Sue, while unconscious, was kidnapped and transported to his caverns. Mole Man sends one of his created monsters to New York to retrieve the others. The other members of the team manage to defeat it. They follow the hole the monster made and confront Mole Man, eventually rescuing Sue. The Four defeat his forces but the Mole Man escapes. However, he returned and kidnapped several Baxter Building students while explaining more details of his life. He was eventually driven off when he left the students behind and went to confront the Fantastic Four, who had arrived to try to rescue them. The students created weaponry from the alien technology and drove off all parties (Mole Man, Fantastic Four and the government), intending to build their own civilization in the ruins of the city.