Abstract: Computer system and method for performing valuation of stock options issued by a corporation to employees are provided. The computer system may comprise a historical employee stock option database populated with information regarding employee stock option awards issued by said corporation. The computer system may further comprise a historical stock price database populated with historical stock prices and dividends, if any, issued by that corporation. An employee database may be populated with information regarding employees who have been issued stock options. A first data feed may provide present stock prices of the corporation. A second data feed may provide present risk-free interest rate structure. A processor may be configured to extract from data stored in the databases at least one historical-based parameter affecting a valuation of employee stock options.