Shell Offshore Inc.
Ownership
Shell Offshore Inc. is ultimately owned by Shell .
…and Shell is itself held by
- BlackRock 7.6%
- BlackRock, Inc. 7.6%
- The Vanguard Group 4.8%
- Norges Bank Investment Management 3.0%
- State Street Corporation 1.3%
- Geode Capital Management 0.7%
Also owned by Shell
Sakhalin Energy 
Shell Canada 
Quaker State 
Shell V-Power Similar companies
In Oil & Gas, under different ownership.
Rosneft Sources
- SHELL OFFSHORE INC. — GLEIF
- 20-F EX-21 — subsidiaries as filed — SEC EDGAR