Top 10 Biggest Oil Deals Ever!  

Fuel for thought

Top 10 Biggest Oil Deals Ever!  

27 Aug, 2015

Published over 10 years ago. See the latest and most current information on Fuel for thought.

Earlier this year Royal Dutch Shell took over BG Group for a cool price tag of £47 billion. While the figure may seem eye-wateringly high it actually only clocks in as the world’s 14th largest oil M&A deal. So what deals have made the top 10? Read on for an overview of the biggest M&A deals on the planet that have categorically shaped the face of the industry as we know it.

  • Exxon and Mobil merger

In 1999 Exxon and Mobil merged to form ExxonMobil, an American owned, Taxas based multinational oil and gas corporation. The deal was worth a huge $80.3 billion and went on to help the company emerge as one of the biggest oil producers on the planet.

  • Royal Dutch and Shell Transport and Trading merger

In 1995 Royal Dutch and Shell Transport and Trading officially merged to the tune of $80.1 billion. As of 2014 it was the 4th largest company in the world and is considered one of the big six ‘supermajors’ in the oil and gas industry.

  • TNK-BP acquirer by Rosneft

In 2012 Russian integrated oil company majority Rosneft bought out BP’s 50% stake in affiliate firm, TNK. It forked out $55.4 billion which saw it become the world's largest listed oil company by output, producing over 4.5 million barrels a day.

  • BG Group acquirer by Royal Dutch Shell

Earlier this year Royal Dutch Shell signed an acquirer deal to take over BG Group for a huge $70.1 billion. As mentioned above it’s the most recent major M&A deal to make global headlines and reflects the industry’s new strategy to capitalise on the weak state of the current oil and gas market.

  • Brazilian Oil & Gas Asset acquirer by Petrobras

Back in 2010 semi-public Brazilian multinational energy corporation Petrobras snagged a plethora of the government’s oil and gas assets as part of a $42.6 billion deal.  

  • Burlington Resources acquirer by ConocoPhillips

In 2005 American multinational energy corporation ConocoPhillips acquired Burlington Resources for the bargain price of $35.6 billion. The idea was to elevate the company closer to the supermajor category.  

  • Baker Hughes acquirer by Halliburton

Last year Halliburton took over Baker Hughes at the cost of $35.5 billion.

  • Hydro Nordisk acquirer by Statoil

2006 saw Statoil claim ownership of oil and gas assets sold by Hydro Nordisk to the value of $30.5 billion.

  • XTO Energy acquirer by Exxon Mobil

In 2009 Exxon Mobil cemented its status as one of the world’s oil and gas goliaths with a $24.9 billion overtake of XTO Energy.

  • Phillips 66 acquirer by Shareholders of ConocoPhillips

In an endeavour by ConocoPhillips shareholders Phillips 66 was acquired at a cost of $20.7 billion.

Every one of these companies has worked its way to the top by taking a meticulous approach to safety and leak management. ‘Mitigating Oil & Gas Casing Failures’ highlights the importance of robust casing and suggests a series of best practice procedures for purchasing, record keeping and inspection.

PIN 27.2 Apr/May 2026

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