Iya ing mitatag ampong chairman ning Vulcan Inc., nung nu iti privadu yang asset management a cumpania, ampong chairman ning Charter Communications. I Allen atin ya naman multi-billion dollar investment portfolio nung nu kayabe makataya keng Digeo, real estate holdings, ampong maiggit a 40 aliwang technology, media, ampong content a cumpania. I Allen iya mu rin ing mikibandi kareng atlung aliwang professional sports teams: ing Seattle Seahawks na ning National Football League, ing Portland Trail Blazers na ning National Basketball Association, ampo ing Seattle Sounders FC franchise keng Major League Soccer a megumpisang mamialung keng 2009 season.