How we calculated the Top 50

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Figures for the Post-Gazette's Top 50 lists were derived from company reports and Bloomberg and Post-Gazette research.

Revenue, net income and return on equity data are based on the most recent fiscal year reports filed by each company, as of close of business March 14. In most cases, that is the 2011 calendar year.

Stock prices and price changes are for calendar year 2011. For each of the companies that went public during 2011, the price change is based on the stock's initial offering price. Market capitalization, which is based on shares outstanding and stock price, was measured at the end of December.

For overall rankings, an average score was determined for each of the seven performance categories: revenue, revenue change, net income, net income change, stock price change, market capitalization and return on equity.

Those averages were subtracted from individual company scores in each category, with the difference divided by the standard deviation for each of the categories to give each company a weighted score in each category.

The weighted scores for each company in each category were then added up to determine the overall scores.

An identical procedure was followed to arrive at the growth rankings, using the categories of revenue change, net income change, stock price change and return on equity.


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