United Rentals Inc. (NYSE: URI) suffered a significant 15.1% decline in stock value after reporting fourth-quarter earnings that fell short of Wall Street expectations, with revenue at $4.21 billion. The equipment rental giant's disappointing results included adjusted earnings per share of $11.09, which were 6.1% below forecasts, and a forecasted full-year revenue of $16.8 billion to $17.3 billion. Despite these challenges, United Rentals maintains a strong cash position of $459 million and has announced a $5 billion share repurchase program to enhance shareholder value.