Royal Dutch Shell PLC, commonly known as Shell, is a British-Dutch oil and gas company headquartered in the Netherlands and incorporated in the United Kingdom. In the 2019 Forbes Global 2000, Shell was ranked as the ninth-largest company in the world (and the largest outside China and the United States), and the largest energy company. Shell was first in the 2013 Fortune Global 500 list of the world's largest companies; in that year its revenues were equivalent to 84% of the Dutch national $556 billion GDP.
Shell is vertically integrated and is active in every area of the oil and gas industry, including exploration and production, refining, transport, distribution and marketing, petrochemicals, power generation and trading. It also has renewable energy activities, including biofuels, wind, energy-kite systems, and hydrogen. Shell has operations in over 70 countries, produces around 3.7 million barrels of oil equivalent per day and has 44,000 service stations worldwide.
Shell has a primary listing on the London Stock Exchange and is a constituent of the FTSE 100 Index. It had a market capitalisation of £216 billion at the close of trading on 27 June 2019, by far the largest of any company listed on the London Stock Exchange and among the highest of any company in the world.
Shell was formed in 1907 through the amalgamation of the Royal Dutch Petroleum Company of the Netherlands and the "Shell" Transport and Trading Company of the United Kingdom. Until its unification in 2005 the firm operated as a dual-listed company, whereby the British and Dutch companies maintained their legal existence but operated as a single-unit partnership for business purposes. Shell first entered the chemicals industry in 1929.
In 1970 Shell acquired the mining company Billiton, which it subsequently sold in 1994 and now forms part of BHP Billiton. In recent decades gas exploration and production has become an increasingly important part of Shell's business. Shell acquired BG Group in 2016, making it the world's largest producer of liquefied natural gas (LNG).
According to en.wikipedia