Epsilon (the global marketing technology and consumer intelligence agency) is not a standalone publicly traded company; rather, it operates as a wholly owned subsidiary of Publicis Groupe, which is publicly traded on the Euronext Paris exchange under the ticker symbol PUB (and over-the-counter in the U.S. as PUBGY). However, independent corporate entities sharing the name—such as Epsilon Energy Ltd.—are directly publicly traded on public stock exchanges, specifically listed on the NASDAQ exchange under the ticker symbol EPSN.