High Quality Content by WIKIPEDIA articles! Dunder Mifflin Paper Company, Inc. is a fictional paper sales company featured in the United States television series The Office. Until very late 2009, it supposedly traded on the New York Stock Exchange under the ticker symbol DMI,; in early 2010 it was absorbed by the (fictional) Tallahassee, Florida-based electronics conglomerate Sabre, and is now known as "Dunder Mifflin Paper Company, Inc. - A Division of Sabre".