Where are the headquarters of one of the six largest companies in the world in 2016 that owns 15 percent of the shares in Abu Dhabi Gas Industries Limited?
Royal Dutch Shell: Royal Dutch Shell plc (, ), commonly known as Shell, is a British–Dutch multinational oil and gas company headquartered in the Netherlands and incorporated in the United Kingdom. Royal Dutch Shell:  It is one of the six oil and gas "supermajors" and the sixth-largest company in the world measured by 2016 revenues (and the largest based in Europe).
i don't know