Delek Group is of one Israel's largest companies, owned by Yitzhak Tshuva (Isaac Sharon), a self-made multi-millionaire. Delek Group is involved in the energy and infrastructure, with investments in upstream and downstream energy, water desalination and power plants. Delek Group' subsidiaries are also involved in insurance and financial services. Delek Group is listed on the Tel Aviv stock exchange under the ticker symbol, DLEKG,> and is a member of the TA-25 Index of leading Israeli companies, as of July 2012 two of the group's subsidiaries are also listed on the TA-25 Index, Avner Oil Exploration LP and Delek Drilling LP. The group's USA operations, Delek US Holdings, Inc. (NYSE|DK), are listed on the New York Stock Exchange.  Wikipedia