The Rockefeller Family still controls the oil monopoly and have for over 100 years. Nothing has changed.
Interesting, but the family names of people running the remnants of the Seven Sisters, let alone the NOCs which
control most of the worlds oil, isn't Rockefeller.
That's because there is a subtle difference between ownership and control. After Rockefeller was forced to divest his ownership of Standard Oil. Some stockholders then tried to oust him from the board. On paper he only owned 25% but he ended up voting 60% of the proxies. The monopolists have vehicles, like charities and banks that they control, to maintain their monopolies without owning the stock in their name.
For example, banks have pension funds, etc., that own the stock, but the bank votes the proxies. Charities, like the Rockefeller Foundation, are endowed with stock. The charity owns the stock but the family votes the proxies. So whose "name" owns the company is meaningless and only there to deceive the gullible, it's who votes the proxies that controls the monopoly.