- EA Games – EA is from Electronic Arts. The company was founded in May 1982 as Amazin' Software and changed its name to Electronic Arts in October the same year.
- eBay – Pierre Omidyar, who had created the Auction Web trading website, had formed a web consulting concern called Echo Bay Technology Group. "Echo Bay" did not refer to the town in Nevada, "It just sounded cool", Omidyar reportedly said. Echo Bay Mines Limited, a gold mining company, had already taken EchoBay.com, so Omidyar registered what (at the time) he thought was the second best name: eBay.com.
- EDS – Electronic Data Systems, founded in 1962 by former IBM salesman Ross Perot. According to the company history: "He chose Electronic Data Systems from potential names he scribbled on a pledge envelope during a service at Highland Park Presbyterian Church in Dallas."
- Eidos – named from a Greek word meaning "species". The company became well known for its Tomb Raider series of games.
- Eletropaulo – One of the largest Brazilian companies in electricity generation and distribution, its name derives from Companhia de Electricidade de São Paulo.
- Embraer – Brazilian aircraft manufacturer, its name is an abbreviation of Empresa Brasileira de Aeronáutica (Brazilian Aeronautics Company).
- EMBRAPA – Brazilian state agricultural research and development company, its name is an abbreviation of Empresa Brasileira de Pesquisa Agropecuária (Brazilian Agriculture Research Company).
- EMBRATEL – an abbreviation of Empresa Brasileira de Telecomunicações (Brazilian Telecommunications Company). Brazil's largest telecommunications company, it was a state monopoly until 1992 when it was privatized and sold to MCI, then later resold to Telmex.
- EMC Corporation – named from the initials of the founders, Richard Egan and Roger Marino. There has long been a rumor that another partner provided the third letter (C). Other reports indicate the C stands for Company. EMC adopted the EMC² notation to refer to Einstein's famous equation, E = mc².
- EMI – formerly Electric and Musical Industries Ltd.
- Emporis – Empor comes from the German and means "aloft, rising". One of the world's largest providers of data concerning buildings.
- Equifax – Equitable and factual
- Ernst & Young – Named for the company's founders, A.C. Ernst and Arthur Young.
- Ericsson – Telefonaktiebolaget LM Ericsson is named after its founder Lars Magnus Ericsson, who opened a telegraph equipment repair shop in Stockholm, Sweden, in 1876.
- ESPN – Entertainment and Sports Programming Network
- ESRI – Environmental Systems Research Institute, the first geographic information system (GIS) software company founded by Jack and Laura Dangermond in Redlands, California, in 1969
- Epson – Epson Seiko Corporation, the Japanese printer and peripheral manufacturer, was named from "Son of Electronic Printer" after a highly successful model, the EP-101
- Esso – the enunciation of the initials S.O. in Standard Oil of New Jersey.
- Evernote – combination of the words forever and note to indicate the core service that the app provides.
- Exxon – a name contrived by Esso (Standard Oil of New Jersey) in the early 1970s to create a neutral but distinctive label for the company. Within days, Exxon was being called the "double cross company" but this eventually subsided. (Esso is a trademark of ExxonMobil.) Esso had to change its name in the U.S. because of restrictions dating to the 1911 Standard Oil antitrust decision.
Read more about this topic: List Of Company Name Etymologies