Ultramar plc
| Industry | Oil and gas | 
|---|---|
| Founded | 1935 | 
| Defunct | 1991 | 
| Fate | Acquired | 
| Successor | LASMO | 
| Headquarters | London, UK | 
| Key people | John Darby (Chairman) | 
Ultramar plc was a leading British oil and gas exploration and production business. It was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index.