A ranking of companies based on a set of criteria such as revenue, earnings, deals or any other relevant metrics. The rankings are organized into lists, which can be used for investment research purposes or as promotional material for the companies on the list.
Below is an example of a league table comparing the revenue and % revenue share of four different banks. 
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Some of the most well-known league tables are those that track the dealings of investment banks, such a tables that tally the ongoing deals done by various banks.
For example, a league table put out by a financial information provider may show all of the merger and acquisition deals that each bank has managed during a yearly period, illustrating the date in terms of the combined dollar value of the deals as well as the share of the merger and acquisition deal market for the period.
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