Aramco was first formed from Standard Oil of California. Other companies bought into the oil fields in Saudi. In 1973, the Saudi Arabian government acquired a 25% stake in Aramco. It increased its shareholding to 60% by 1974, and finally took full control of Aramco by 1980, by acquiring a 100% percent stake in the company.
The oil production in Saudi Arabia is only by Saudi Aramco. There are some joint ventures within the country, but I do not believe they are oil production.
Any projections in the industry showing how many years of that level of production the Saudis could have left? At some point they have to hit a steep decline.