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Abstract
In competitive markets, companies search their positions according to their competitors with internal resources or make use of the services of market research firms. Various credit and rating agencies or co-ordination for sectors with some social and political remediation also examine and rank the companies in these sectors. These companies are listed on the Stock Exchange Istanbul. Petroleum and derivatives industries, which are important sources of energy for industrial and Turkey, have been reconsidered in the Fortune 500 ranking by MOORA and COPRAS optimization methods and with statistical factor analysis with various efficiency and size indicating financial ratios. The results obtained are consistent within themselves and differ from the Fortune 500 rank order. The difference between quality and quantity can lead companies to wrong strategies in this sort of ranking. The study might be important to bring out efficiency and productivity in the sense of planning possible strategic changes.