Market Cap Chart

View Market Cap for ATO.
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Sep '18
Jan '19
May '19
 
285.00
270.00
255.00
240.00
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Historical Market Cap Data

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Date Value
July 02, 2026 29.52B
July 01, 2026 28.88B
June 30, 2026 28.76B
June 29, 2026 29.18B
June 26, 2026 29.24B
June 25, 2026 28.99B
June 24, 2026 28.81B
June 23, 2026 28.56B
June 22, 2026 28.31B
June 18, 2026 28.39B
June 17, 2026 28.32B
June 16, 2026 28.31B
June 15, 2026 28.31B
June 12, 2026 28.37B
June 11, 2026 28.08B
June 10, 2026 28.25B
June 09, 2026 27.98B
June 08, 2026 28.02B
June 05, 2026 28.42B
June 04, 2026 28.04B
June 03, 2026 28.09B
June 02, 2026 28.17B
June 01, 2026 27.90B
May 29, 2026 28.23B
May 28, 2026 28.88B
Date Value
May 27, 2026 29.42B
May 26, 2026 29.66B
May 22, 2026 29.68B
May 21, 2026 29.62B
May 20, 2026 29.38B
May 19, 2026 29.67B
May 18, 2026 29.80B
May 15, 2026 29.46B
May 14, 2026 30.19B
May 13, 2026 30.04B
May 12, 2026 30.37B
May 11, 2026 30.40B
May 08, 2026 30.19B
May 07, 2026 30.36B
May 06, 2026 30.84B
May 05, 2026 31.26B
May 04, 2026 31.34B
May 01, 2026 31.47B
April 30, 2026 31.71B
April 29, 2026 31.00B
April 28, 2026 31.24B
April 27, 2026 30.98B
April 24, 2026 30.95B
April 23, 2026 31.35B
April 22, 2026 30.46B

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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