Market Cap Chart

View Market Cap for MPLX.
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255.00
240.00
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Historical Market Cap Data

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Date Value
August 21, 2026 59.23B
August 20, 2026 59.42B
August 19, 2026 59.51B
August 18, 2026 60.19B
August 17, 2026 59.91B
August 14, 2026 60.31B
August 13, 2026 59.64B
August 12, 2026 60.78B
August 11, 2026 60.13B
August 10, 2026 59.52B
August 07, 2026 59.67B
August 06, 2026 61.27B
August 05, 2026 60.12B
August 04, 2026 61.36B
August 03, 2026 59.73B
July 31, 2026 59.27B
July 30, 2026 58.42B
July 29, 2026 58.60B
July 28, 2026 60.03B
July 27, 2026 59.18B
July 24, 2026 59.47B
July 23, 2026 58.32B
July 22, 2026 57.40B
July 21, 2026 57.28B
July 20, 2026 57.93B
Date Value
July 17, 2026 57.86B
July 16, 2026 57.97B
July 15, 2026 57.20B
July 14, 2026 57.30B
July 13, 2026 58.01B
July 10, 2026 57.75B
July 09, 2026 57.99B
July 08, 2026 58.24B
July 07, 2026 58.32B
July 06, 2026 57.77B
July 02, 2026 57.96B
July 01, 2026 56.70B
June 30, 2026 57.12B
June 29, 2026 57.06B
June 26, 2026 57.37B
June 25, 2026 56.91B
June 24, 2026 57.07B
June 23, 2026 58.55B
June 22, 2026 57.75B
June 18, 2026 57.69B
June 17, 2026 56.75B
June 16, 2026 56.92B
June 15, 2026 56.51B
June 12, 2026 57.72B
June 11, 2026 57.34B

Market Capitalization Definition

Market Capitalization measures the total value of a company based on their stock price multiplied by the shares outstanding. This metric is important because it gives you an idea of the size of a company, and how the size has changed over time. When studying companies from a relative basis, it would make sense to compare companies that have a similar market capitalization because factors like market share, economies of scale, and business models would also be similar.

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Market Cap Range, Past 5 Years

View Market Cap Range, Past 5 Years
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