Abstract
This paper investigates the usefulness of the neural network, namely Kohonen's self-organization map methodology as an alternative to the hierarchical clustering and K-means methodology in classifying the listed companies on the Egyptian Stock. In order to achieve that, 26 financial indicators have been used for 32 companies included in the investigation, published in the Statistical Yearbook issued by the Egyptian Organization for Censorship. The results indicate that Kohonen's self-organizing map is the best tool for classification of financial data.