|Traded as||NYSE: MRO
S&P 500 Component
|Industry||Oil and gas industry|
|Predecessor(s)||The Ohio Oil Company|
|Headquarters||Marathon Oil Tower
Houston, Texas, United States
|Key people||Thomas J. Usher
Clarence P. Cazalot, Jr.
(President) & (CEO)
|Revenue||$ 14.6 billion (FY 2011)|
|Operating income||$ 4.8 billion (FY 2011)|
|Net income||$2.9 billion (FY 2011)|
|Total assets||$ 31.3 billion (FY 2011)|
|Total equity||$ 17.1 billion (FY 2011)|
|Employees||3,322 (December 2011)|
Marathon Oil Corporation is a United States-based oil and natural gas exploration and production company. Principal exploration activities are in the United States, Norway, Equatorial Guinea, Poland, Angola and Iraqi Kurdistan. Principal production activities are in the United States, the United Kingdom, Norway, and Equatorial Guinea. Within the United States, Marathon Oil has recently focused development efforts on liquids-rich shale plays, including the Bakken and Eagle Ford formations. Marathon Oil owns interests developing Athabasca oil sands (Canada) resources and in Waha Oil Company (Libya). Marathon's headquarters facility is the Marathon Oil Tower in Houston, Texas.
Marathon began as The Ohio Oil Company in 1887. In 1889, it was purchased by John D. Rockefeller's Standard Oil trust. It remained a part of Standard Oil until the trust was broken in 1911. In 1930, The Ohio bought the Transcontinental Oil Company, giving it the "Marathon" brand name. In 1962, the company changed its name to "Marathon Oil Company" after its main brand name. Mobil wanted to buy the company in 1981. The residents of Findlay, Ohio, the corporation's home town, worried that the Findlay jobs would be lost so Marathon looked for a white knight. They found one in 1982 when United States Steel bought the company. The headquarters moved to Houston in 1990 but the company maintained downstream operations in Findlay (which are now Marathon Petroleum). In 2001, USX, the holding company that owned United States Steel and Marathon, spun off the steel business and in 2002 USX renamed itself Marathon Oil Corporation.
In 1998, Marathon and Ashland, Inc., formed Marathon Ashland Petroleum LLC to refine, market and transport crude oil and petroleum products, primarily in the Midwest, the upper Great Plains and southeastern United States.
In late 2003, Marathon Oil and partners (Noble Energy, AMPCO) started the Bioko Island Malaria Control Project (BIMCP) in Equatorial Guinea. Malaria control activities included indoor residual spraying, improved diagnosis and case management, and capacity building to contain future outbreaks. As of late 2005, BIMCP had proven being successful in reducing malaria transmission, reducing the proportion of children with malaria parasites, and improving iron status. BIMCP is perceived as a model of hands-on corporate involvement in a humanitarian effort with government, non-profits and academic organizations to reduce the burden of malaria in countries located in Equatorial Africa. Equatorial Guinea's President Obiang Nguema is one of the world's worst dictators, according to Parade Magazine. Marathon's humanitarian efforts have mitigated some of the criticism resulting from their dealings with Nguema's regime.
Marathon Oil is a signatory participant of the Voluntary Principles on Security and Human Rights.
Environmental record 
The Political Economy Research Institute ranks Marathon Oil 51st among corporations emitting airborne pollutants in the United States. The ranking is based on the quantity (1.5 million pounds in 2005) and toxicity of the emissions. In 2000, the Kentucky Natural Resources and Environmental Cabinet demanded that Marathon pay a $170,000 penalty for a pipeline spill earlier that year. This case was settled in 2002. That same year Texas sent a “Notice of Enforcement” citing Marathon for “excess air emissions” from its Yates Gas Plant. Marathon was prosecuted for air permit violations in 2003 by Louisiana. The Environmental Protection Agency then prosecuted Marathon for not following a pollution prevention plan as well as not complying with the stormwater permit. In November 2006 The Environmental Protection Agency published the list of PCB violations by Marathon Oil company for sum of $38,000.
See also 
- "3M 2011 Annual Report, Form 10-K, Filing Date Feb 29, 2012". secdatabase.com. Retrieved July 6, 2012.
- "Contact Us." Marathon Oil. Retrieved on August 22, 2009.
- Rigzone article on 2003 Kinder Morgan acquisition
- "Marathon spin-off gives Ohio fifth largest refiner". Associated Press via Yahoo! Finance. Retrieved July 1, 2011.
- "Toxic 100 Index". Political Economy Research Institute. 2008-09-11. Retrieved 2009-05-23.
- "MARATHON OIL CORP - MRO Annual Report (10-K) Item 3. Legal Proceedings". EDGAR-Online. Retrieved 2007-11-07.
- Daniel Duncan (2006). "Marathon Oil Company settles PCB Violations for $38,000". EPA. Retrieved April 16, 2008.
- Droz, R.V. (2004). Standard Oil : Today. Retrieved June 26, 2005.
- Marathon Oil Corporation (2003). Our History. Retrieved June 26, 2005.
- Marathon Oil
- Confex Tech Program - Marathon Oil
- Marathon Oil stock performance chart
- Marathon CEO discusses America's energy security (BIC Magazine, September 2007)