Apple Online StoreApple Inc. shares today rose $2.78, or 0.81%, on below-average volume of 10,602,391 shares to set a new all-time closing high of $344.42.

Apple’s previous all-time closing high was $$342.46 set on January 10, 2011. Apple’s all-time intraday high stands at $344.96, set yesterday, january 11, 2011. Apple’s 52-week low is $190.25.

At market close, Apple’s market value stands at $315.94 billion.

The top five U.S. publicly-traded companies, based on market value, are:
1. Exxon Mobil (XOM) – $386.16B
2. Apple (AAPL) – $315.94B
3. Microsoft (MSFT) – $244.26B
4. Berkshire-Hathaway (BRKA) – $199.62B
5. General Electric (GE) – $198.92B

Selected companies’ current market values:
• Google (GOOG) – $197.26B
• Wal-Mart (WMT) – $195.38B
• IBM (IBM) – $185.24B
• Intel (INTC) – $118.83B
• Cisco (CSCO) – $117.06B
• Hewlett-Packard (HPQ) – $99.97B
• Amazon (AMZN) – $82.62B
• Disney (DIS) – $74.17B
• Nokia (NOK) – $39.91B
• Sony (SNE) – $36.53B
• Research In Motion (RIMM) – $32.99B
• Dell (DELL) – $27.78B
• Yahoo! (YHOO) – $21.704B
• Motorola Mobility (MMI) – N/A
• Adobe (ADBE) – $17.01B
• Advanced Micro Devices (AMD) – $5.72B
• RealNetworks (RNWK) – $544.02M

AAPL quote via NASDAQ here.