America's 20 largest corporate giants

Oil giant Exxon Mobil has toppled Wal-Mart Stores to become America's largest corporation. It is the 13th time that Exxon has taken first place in the Fortune 500 list.

Take a look at America's 20 largest corporate giants...

Exxon Mobil Corporation (Rank 1)

Exxon Mobil, a multinational oil and gas corporation was formed on November 30, 1999, with the the merger of Exxon and Mobil.

ExxonMobil is one of the world's largest publicly traded companies by market capitalisation and the second largest company in the world by revenue.

Revenue: $452,926 mn
Profit: $41,060 mn
Assets: $331,052 mn

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Wal-Mart Stores (Rank 2)

Wal-Mart Stores, a multinational retailer runs large discount department stores and warehouse stores across the world.

It is also the biggest private employer in the world with over two million employees, and is the largest retailer in the world.
Walmart remains a family-owned business, as the company is controlled by the Walton family who own a 48% stake in Walmart. The company was founded by Sam Walton in 1962.

Revenue: $446,950 mn
Profits: $15,699 mn
Assets: $193,406 mn

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Chevron (Rank 3)

Chevron Corporation is an American multinational energy corporation headquartered in California, with presence in more than 180 countries.

Chevron is one of the world's 6 'supermajor' oil companies. For the past five years, Chevron has been continuously ranked as one of America's 5 largest corporations by Fortune 500.

In 2011 it was named the 16th largest public company in the world by Forbes Global 2000.

Revenues: $245,621 mn
Profits: $26,895 mn
Assets: $209,474 mn

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ConocoPhillips (Rank 4)

ConocoPhillips Company is the fifth largest private sector energy corporation in the world and one of the six 'supermajor' oil companies.

It sells fuel under the Conoco, Phillips 66 and Union 76 brands in North America, and Jet in Europe. ConocoPhillips was created through the merger of Conoco Inc and the Phillips Petroleum Company on August 30, 2002.

Revenue: $237,272 mn
Profit: $12,436 mn
Assets: $153,230 mn

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General Motors (Rank 5)

General Motors Company is an American multinational automotive corporation headquartered in Detroit, Michigan. It was the world's largest automaker by vehicle unit sales in 2011.

General Motors manufactures cars and trucks in 31 countries.

Revenue: $150,276 mn
Profit: $9,190 mn
Assets: $144,603 mn

General Electric (Rank 6)

A multinational conglomerate, General Electric Company was ranked 6th largest firm in the US and the 14th most profitable company by Fortune in 2011.

Charles Coffin, Edwin Houston, Elihu Thomson, Thomas Edison founded the company in 1892.

Revenue: $147,616 mn
Profit: $14,151 mn
Asset: $717,242 mn

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Berkshire Hathaway (Rank 7)

Berkshire Hathaway and its subsidiaries engage in diverse business activities including property and casualty insurance and reinsurance, utilities and energy, freight rail transportation, finance, manufacturing, retailing and services.

Warren Buffett is the company's chairman and CEO.

Revenue: $143,688 mn
Profit: $10,254 mn
Assets: $392,647 mn

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Fannie Mae (Rank 8)

The Federal National Mortgage Association commonly known as Fannie Mae, was founded in 1938 during the Great Depression as part of the New Deal.

It is a government-sponsored enterprise (GSE), though it has been a publicly traded company since 1968.

Revenue: $137,451 mn
Assets: $ 3,211,484 mn

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Ford Motor (Rank 9)

Ford Motor Company was founded by Henry Ford and incorporated on June 16, 1903. In addition to the Ford and Lincoln brands, Ford owns a small stake in Mazda in Japan and Aston Martin in the UK.

The company is controlled by the Ford family, which owns a controlling stake in Ford Motor.

Revenue: $136,264 mn
Profit: $20,213 mn
Assets: $178,348 mn

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Hewlett-Packard (Rank 10)

World's leading PC manufacturer, Hewlett-Packard provides products, technologies, software, solutions and services to consumers, small- and medium-sized businesses (SMBs) and large enterprises, including customers in the government, health and education sectors.

The company was founded in a garage in Palo Alto by William (Bill) Redington Hewlett and Dave Packard.

Revenues: $127,245 mn
Profit: $7,074 mn
Assets: $129,517 mn

AT & T (Rank 11)

AT&T Inc is the second largest provider of mobile telephony and largest fixed telephony provider in the United States, and a provider of broadband subscription television services.

It is the 20th largest mobile telecom operator in the world with over 100.7 million mobile customers.

Revenue: $126,723 mn
Profit: $3,944 mn
Assets: $270,344 mn

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Valero Energy

Valero Energy Corporation is an international manufacturer and a marketer of transportation fuels and other petrochemical products.

The company owns and operates 15 refineries throughout the United States, Canada, United Kingdom, and the Caribbean region.

Revenue: $125,095 mn
Profit: $2,090 mn
Assets: $42,783 mn

Bank of America (Rank 13)

Bank of America is the second-largest bank holding company in the United States by assets, and the fourth-largest bank in the US by market capitalisation.

Bank of America has its presence in more than 150 countries.

Revenue: $115,074 mn       
Profit: $1,446 mn
Assets: $2,129,046 mn

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14. McKesson (Rank 14)

McKesson Corporation is the largest pharmaceuticals company in the world, which provides medicines, pharmaceutical supplies, information and care management products and services across the healthcare industry.

Founded in New York City as Olcott & McKesson by Charles Olcott and John McKesson in 1833, it is the 15th largest company in the United States.

Revenue: $112,084 mn
Profit: $1,202 mn
Assets: $30,886 mn

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Verizon Communications (Rank 15)

Verizon Communications Inc is a global broadband and telecommunications company. It started in 1983 as Bell Atlantic based in Philadelphia.
 
Revenue: $10,875 mn
Profit: $2,404 mn
Assets: $230,461 mn     

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J.P. Morgan Chase & Co (Rank 16)

JPMorgan Chase & Co is a multinational banking corporation of securities, investments and retail. It is the largest bank in the United States by assets and market capitalization.

JPMorgan Chase is one of the Big Four banks of the United States with Bank of America, Citigroup and Wells Fargo.

Revenues: $110,838 mn
Profits: $18,976 mn
Assets: $2,265,792 mn

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Apple Inc (Rank 17)

Apple Inc designs and sells consumer electronics, computer software, and personal computers.

The company's best-known hardware products are the Macintosh line of computers, iPod, iPhone and the iPad.

Established on April 1, 1976, Apple Inc is the largest publicly traded company in the world by market capitalization, as well as the largest technology company in the world by revenue and profit.

Revenue: $108,249 mn
Profit: $25,922 mn
Assets: $116,371 mn

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CVS Caremark (Rank 18)

CVS Caremark Corporation provides pharmacy services through its over 7,000 CVS/pharmacy and Longs Drugs stores.

As of December 31, 2011, the company had 200,000 employees, more than 7,327 retail stores, 30 onsite pharmacies and 31 specialty pharmacy stores.

Revenue: $107,750 mn
Profits: $3,461 mn
Assets: $64,543 mn

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International Business Machines (Rank 19)

Multinational technology and consulting corporation, IBM manufactures and sells computer hardware and software.

The company was founded in 1911 as the Computing Tabulating Recording Corporation through a merger of three companies.

Revenue: $106,916 mn
Profit: $15,855 mn
Assets:$116,433 mn

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Citigroup (Rank 20)

Citigroup Inc was formed from one of the world's largest mergers in history by combining the banking giant Citicorp and financial conglomerate Travelers Group on April 7, 1998.

Citigroup has the world's largest financial services network, spanning 140 countries with 16,000 offices worldwide.

Revenue: $102,939 mn       
Profit: $11,067.0 mn      
Assets: $1,873,878 mn