In 2001, Kubert drew the new Ultimate X-Men title, penciling the first four issues, and then illustrating 16 various issues beginning with #7, before leaving the title with issue #33 (July 2003). In 2004, he began a run on Ultimate Fantastic Four, once again with Writers Mark Millar and Brian Michael Bendis, illustrating that series' first six issues, and then issues 13-18.