Qatar Petroleum is the national oil company of Qatar, established in 1974 and headquartered in Doha, covering oil and gas exploration, exploitation, transportation and storage, with its turnover accounting for about 60% of Qatar's GDP.

Industries Qatar Qatar's leading industrial company, ranked 900th in the Global Business 2000 in 2014.

Qatar Investment Authority (abbreviated: QIA) is a Qatar sovereign wealth fund established in 2005, headquartered in Doha and funded mainly by Qatar oil revenues, with total assets of US$170 billion in 2013.

Ezdan Holding Group (Ezdan Holding Group), a leading Qatar listed group, was listed on the Qatar Stock Exchange in February 2008 and was ranked 1613th in the Global Business 2000 in 2014.