9. Royal Dutch Shell — BG Group
How much? $81.5 billion
In April 2015, the oil and gas company Royal Dutch Shell bought the British oil and gas BG Group in a deal totaling> $81.5 billion.
According to Forbes' world's biggest public companies list, Royal Dutch Shell is the 14th biggest public company in the world and has a $195.4 billion market value as of May 2015. The company is headquartered in The Hague, Netherlands.
8. Exxon — Mobil
How much? $85.6 billion
In December 1998, the American oil and gas company Exxon and the American oil and gas company Mobil merged after signing an agreement to form ExxonMobil.
According to Forbes' world's biggest public companies list, ExxonMobil is the 7th biggest public company in the world and has a $357.1 billion market value as of May 2015. The company is headquartered in Irving, Texas.
7. Royal Bank of Scotland Group — ABN AMRO Holding
How much? $95.6 billion
In April 2007, the British banking and insurance holding company Royal Bank of Scotland Group bought the Dutch bank ABN AMRO in a deal totaling $95.6 billion.
According to Forbes' world's biggest public companies list, RBS is the 430th biggest public company in the world and has a $60.2 billion market value as of May 2015. The company is headquartered in Edinburgh, Scotland.
6. AT&T — BellSouth
How much? $101.9 billion
In March 2006, the American multinational telecommunications corporation AT&T bought BellSouth in a deal totaling $95.6 billion.
According to Forbes' world's biggest public companies list, AT&T is the 27th biggest public company in the world and has a $173 billion market value as of May 2015. The company is headquartered in Dallas, Texas.
5. Altria Group — Philip Morris International
How much? $111.3 billion
In January 2008, the American tobacco and cigarette corporation Altria Group bought Phillip Morris International in a deal totaling $111.3 billion.
According to Forbes' world's biggest public companies list, Altria Group is the 237th biggest public company in the world and has a $101.4 billion market value as of May 2015. The company is headquartered in Richmond, Virginia.
4. Pfizer — Warner-Lambert
How much? $111.8 billion
In January 2008, the American multinational pharmaceutical corporation Pfizer bought Warner Lambert in a deal totaling $111.8 billion.
According to Forbes' world's biggest public companies list, Pfizer is the 48th biggest public company in the world and has a $211.7 billion market value as of May 2015. The company is headquartered in New York City, New York.
3. America Online — Time Warner Inc
How much? $112.1 billion
In January 2000, the American multinational mass media corporation America Online, known as AOL, and Time Warner Inc merged after signing an agreement to form AOL Time Warner.
According to Forbes' world's biggest public companies list, Time Warner, which spun off AOL in 2009, is the 163rd biggest public company in the world and has a $70.8 billion market value as of May 2015. The company is headquartered in New York City, New York.
2. Verizon Communications — Verizon Wireless
How much? $130.1 billion
In September 2013, the American broadband and telecommunications company Verizon Communications, bought Vodafone's 45% stake in Verizon Wireless.
According to Forbes' world's biggest public companies list, Verizon Communications is the 22nd biggest public company in the world and has a $202.5 billion market value as of May 2015. The company is headquartered in New York City, New York.
Vodafone AirTouch — Mannesmann
How much? $172 billion
In November 1999, the British multinational telecommunications company Vodafone AirTouch, bought German telephony and internet company Mannesmann in a deal totaling $172 billion.
According to Forbes' world's biggest public companies list, Vodafone Group plc, which reverted to its original name in 2000, is the 40th biggest public company in the world and has a $88 billion market value as of May 2015. The company is headquartered in London, England.