In NASDAQ trading today, Apple Inc. (AAPL) shares gained $2.60, or 0.41%, on slightly above average volume of 21,190,553 to set a new all-time closing high of $636.28.

Apple’s previous all-time closing high was $633.68, set on the last trading day before today, April 5, 2012.

Apple’s all-time intraday high is $639.83, also set set today. Apple’s 52-week low stands at $310.50.

Apple’s market value currently stands at $594.27 billion.

The top five U.S. publicly-traded companies, based on market value:
1. Apple (AAPL) – $594.27B
2. Exxon Mobil (XOM) – $395.86B
3. Microsoft (MSFT) – $261.96B
4. IBM (IBM) – $237.99B
5. GE (GE) – $203.27B

Selected companies’ current market values:
• Google (GOOG) – $205.49B
• Wal-Mart (WMT) – $205.17B
• Intel (INTC) – $138.94B
• Cisco (CSCO) – $107.75B
• Amazon (AMZN) – $87.40B
• Disney (DIS) – $77.53B
• Hewlett-Packard (HPQ) – $45.82B
• Dell (DELL) – $28.60B
• Sony (SNE) – $20.18B
• Nokia (NOK) – $19.11B
• Yahoo! (YHOO) – $18.35B
• Adobe (ADBE) – $16.51B
• Motorola Mobility (MMI) – $11.73B
• Research In Motion (RIMM) – $6.84B
• Sirius XM (SIRI) – $8.71B
• Advanced Micro Devices (AMD) – $5.41B
• RealNetworks (RNWK) – $0.34B

AAPL quote via NASDAQ here.

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