Top 10 most valuable UK companies in the FTSE 100 : In the latest quarterly shuffle of the FTSE 100, SME Web looks at who has shifted into the top ten companies in the UK.
10. BG Group (£49bn)
A huge leap up the rankings for this oil and gas producer, due to rising fuel prices. In December 2009 it had commercial reserves of 2.6bn barrels of oil.
It is the largest supplier of Liquified Natural Gas to the US, seeing shares rise 12pc this year alone.
9. British American Tobacco (£49bn)
The United Kingdom's Imperial Tobacco Company merged with the American Tobacco Company in 1902, creating cigarette brands such as Dunhill, Rothmans, Lucky Strike and Kent. Shares are down 1pc since January 2011.
8. Unilever (£56bn)
An Anglo-Dutch corporation, Unilever owns many products you will find in your own home, such as PG tips, Dove and Hellman's.
This multi-national company fights off strong competition from other large corporations like Proctor and Gamble and Nestle.
Shares have fallen 6pc since December 31st.
7. GlaxoSmithKline (£61bn)
One of the worlds largest pharmaceutical company's with a wide range of products covering respiratory, gastro-intestinal, oncology and vassines.
Shares have dropped back roughly 5pc this year.
6. Rio Tinto (£86bn)
Founded in 1873 when investors purchased a mine complex on the Rio Tinto river in Spain from the Spanish government.
The company has since been growing through a long lone of mergers and acquisitions to name itself as one of the world leaders in the production of many commodities such as aluminium, copper, uranium, coal and diamonds.
Share are down 9pc this year over concerns of the rising fuel costs.
5. BP (£91bn)
British Petroleum took a massive hit after the controversy and disaster that was the explosion last April of the Deepwater Horizon rig in the Gulf of Mexico, in which 11 people died.
BP lost nearly half of its market capitalisation, falling from first to sixth in the FTSE 100.
New chief-executive Bob Dudley has been redeveloping deals with Rosneft to jointly take on the Russian arctic shelf with Reliance Industries.
Share are up 4pc since January.
4. Vodafone Group (£93bn)
Vodafone is the worlds largest mobile telecommunications company based purely on revenue.
It is the second largest based on subscribers (just behind China Mobile) with around 332m users worldwide.
They own 45% of Verizon Wireless, the single largest wireless telecommunications network in the US.
Shares have risen 8.7pc in 2011.
3. HSBC Holdings (£118bn)
Branches of the Hong Kong and Shanghai Banking Corporation were first opened in the far east in 1865. It is the world's 8th largest company, according to Forbes magazine.
Share price has risen 2.3pc this year amid worries from recent investors over reports that it could relocate its headquarters.
2. Royal Dutch Shell (£135bn)
This company was created in 1907 when the Royal Dutch Petroleum Company and Britain's 'Shell' Transport and Trading Company merged their operations in competition with Standard Oil.
The name Shell is thought to be linked to the founder Marcus Samuel's father, who ran an import business selling seashells.Shares have increased 0.9pc this year.
1. BHP Billiton (£148bn)
Again, another company which had two separate mergers; Australia's Broken Hill Proprietary Company (BHP) and the British-Dutch Billiton.
BP's disaster helped it become the biggest constituent of the FTSE 100, where it remains despite a 7pc drop in the prices of shares this year.
10. BG Group (£49bn)
A huge leap up the rankings for this oil and gas producer, due to rising fuel prices. In December 2009 it had commercial reserves of 2.6bn barrels of oil.
It is the largest supplier of Liquified Natural Gas to the US, seeing shares rise 12pc this year alone.
9. British American Tobacco (£49bn)
The United Kingdom's Imperial Tobacco Company merged with the American Tobacco Company in 1902, creating cigarette brands such as Dunhill, Rothmans, Lucky Strike and Kent. Shares are down 1pc since January 2011.
8. Unilever (£56bn)
An Anglo-Dutch corporation, Unilever owns many products you will find in your own home, such as PG tips, Dove and Hellman's.
This multi-national company fights off strong competition from other large corporations like Proctor and Gamble and Nestle.
Shares have fallen 6pc since December 31st.
7. GlaxoSmithKline (£61bn)
One of the worlds largest pharmaceutical company's with a wide range of products covering respiratory, gastro-intestinal, oncology and vassines.
Shares have dropped back roughly 5pc this year.
6. Rio Tinto (£86bn)
Founded in 1873 when investors purchased a mine complex on the Rio Tinto river in Spain from the Spanish government.
The company has since been growing through a long lone of mergers and acquisitions to name itself as one of the world leaders in the production of many commodities such as aluminium, copper, uranium, coal and diamonds.
Share are down 9pc this year over concerns of the rising fuel costs.
5. BP (£91bn)
British Petroleum took a massive hit after the controversy and disaster that was the explosion last April of the Deepwater Horizon rig in the Gulf of Mexico, in which 11 people died.
BP lost nearly half of its market capitalisation, falling from first to sixth in the FTSE 100.
New chief-executive Bob Dudley has been redeveloping deals with Rosneft to jointly take on the Russian arctic shelf with Reliance Industries.
Share are up 4pc since January.
4. Vodafone Group (£93bn)
Vodafone is the worlds largest mobile telecommunications company based purely on revenue.
It is the second largest based on subscribers (just behind China Mobile) with around 332m users worldwide.
They own 45% of Verizon Wireless, the single largest wireless telecommunications network in the US.
Shares have risen 8.7pc in 2011.
3. HSBC Holdings (£118bn)
Branches of the Hong Kong and Shanghai Banking Corporation were first opened in the far east in 1865. It is the world's 8th largest company, according to Forbes magazine.
Share price has risen 2.3pc this year amid worries from recent investors over reports that it could relocate its headquarters.
2. Royal Dutch Shell (£135bn)
This company was created in 1907 when the Royal Dutch Petroleum Company and Britain's 'Shell' Transport and Trading Company merged their operations in competition with Standard Oil.
The name Shell is thought to be linked to the founder Marcus Samuel's father, who ran an import business selling seashells.Shares have increased 0.9pc this year.
1. BHP Billiton (£148bn)
Again, another company which had two separate mergers; Australia's Broken Hill Proprietary Company (BHP) and the British-Dutch Billiton.
BP's disaster helped it become the biggest constituent of the FTSE 100, where it remains despite a 7pc drop in the prices of shares this year.
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