Here's a list of the 10 biggest publicly traded oil companies, ranked by daily production levels. The ranking is adjusted to reflect Rosneft's takeover of TNK-BP announced Monday.
|Company||Millions of barrels of oil equivalent produced per day (as of June 2012 unless stated otherwise)|
|PetroChina||3.5 (as of end of 2011)|
|Royal Dutch Shell (Holland, UK)||3.1|
|Petrobras Petroleo Brasileiro||2.6|
|Pemex||2.6 (as of end of 2011)|
|Lukoil (Russia)||2.1 (as of end of 2011)|