Shell Oil Company
Ownership
Shell Oil Company is ultimately owned by Shell plc .
…and Shell plc is itself held by
- BlackRock 7.6%
- BlackRock, Inc. 7.6%
- The Vanguard Group 4.8%
- Norges Bank Investment Management 3.0%
- State Street 1.3%
- Geode Capital Management 0.7%
Brands Shell Oil Company owns
These are brand names rather than separate companies, so they have no owner of their own beyond Shell Oil Company.
Also owned by Shell plc
Sakhalin Energy 
Shell V-Power 
Quaker State Similar companies
In Oil & Gas, under different ownership.
Rosnieft Websites
- shell.us
Sources
- Shell USA — Wikidata