Computer storage maker EMC today announced a 2-for-1 stock split. The record date for the stock split will be May 19, and the distribution date will be June 2. The stock split is the company's sixth since 1992, with the most recent 2-for-1 split last May. The company went public in 1986. Shares of EMC closed yesterday down $3, or about 2 percent, at $139.