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Unocal
AddedFeb 15, 2024
UpdatedJun 28, 2026
Unocal

Unocal

Acquired

Unocal, a major petroleum explorer and marketer, is a California-based mining company.

HQ
San Ramon, CA, US
Founded
1890
Overview
Compare
Employees

Unocal, originally known as Union Oil Company of California, was a major petroleum explorer and marketer headquartered in El Segundo, California. The company focused on the exploration, production, and marketing of petroleum products, serving a global market. Founded in the late 19th century, Unocal played a significant role in the energy sector through the 20th century and into the early 21st century.

Unocal achieved numerous milestones in petroleum exploration and marketing, contributing significantly to the global energy supply. The company was known for its innovative approaches to oil extraction and refining. Its impact on the energy industry was substantial, influencing both market practices and technological advancements in petroleum exploration.

Unocal - Similar Companies

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Unocal - Quick Facts

Who are Unocal's competitors?

Companies similar to Unocal include Chevron Corp. DL- 75, Citgo Petroleum, Occidental Petroleum Occid and Sunoco.

When was Unocal founded?

Unocal was founded in 1890.

Where is Unocal's headquarters located?

Unocal's headquarters is located in San Ramon, CA, US.

Unocal - Classification

Geographic Exposure
  • United States
NAICS
  • 210000Mining, Quarrying, and Oil and Gas Extraction
  • 211000Oil and Gas Extraction
  • 211100Oil and Gas Extraction
  • 211120Crude Petroleum Extraction
SIC
  • 1300Oil And Gas Extraction
  • 1310Crude Petroleum And Natural Gas
  • 1311Crude Petroleum And Natural Gas
ISIC
  • 610Extraction of crude petroleum
Show 18 more industry codes
NAICS
  • 220000Utilities
  • 221000Utilities
  • 320000Manufacturing
  • 440000Retail Trade
  • 457000Gasoline Stations and Fuel Dealers
  • 457100Gasoline Stations
  • 457120Other Gasoline Stations
  • 450000Retail Trade
  • 325000Chemical Manufacturing
SIC
  • 1380Oil And Gas Field Services
  • 1382Oil And Gas Field Exploration Services
  • 2890Miscellaneous Chemical Products
  • 2899Chemicals And Chemical Preparations, Not Elsewhere Classified
  • 5500Automotive Dealers And Gasoline Service Stations
  • 5540Gasoline Service Stations
  • 5541Gasoline Service Stations
  • 2800Chemicals And Allied Products
  • 5900Miscellaneous Retail