Market Cap Chart

View Market Cap for ATO.
Upgrade now.
Sep '18
Jan '19
May '19
 
285.00
270.00
255.00
240.00
View Market Cap Chart
Start Trial

Historical Market Cap Data

View and export this data back to 1990. Start Trial.
Date Value
August 24, 2026 28.36B
August 21, 2026 28.20B
August 20, 2026 28.82B
August 19, 2026 28.95B
August 18, 2026 28.81B
August 17, 2026 28.71B
August 14, 2026 28.71B
August 13, 2026 28.72B
August 12, 2026 28.66B
August 11, 2026 28.59B
August 10, 2026 28.38B
August 07, 2026 28.76B
August 06, 2026 29.06B
August 05, 2026 29.10B
August 04, 2026 29.18B
August 03, 2026 29.22B
July 31, 2026 29.20B
July 30, 2026 29.45B
July 29, 2026 30.02B
July 28, 2026 30.31B
July 27, 2026 30.12B
July 24, 2026 30.29B
July 23, 2026 30.09B
July 22, 2026 30.16B
July 21, 2026 29.58B
Date Value
July 20, 2026 29.97B
July 17, 2026 30.03B
July 16, 2026 30.09B
July 15, 2026 29.57B
July 14, 2026 30.16B
July 13, 2026 30.33B
July 10, 2026 29.78B
July 09, 2026 29.53B
July 08, 2026 29.93B
July 07, 2026 30.01B
July 06, 2026 29.37B
July 02, 2026 29.89B
July 01, 2026 29.24B
June 30, 2026 29.11B
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

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.

Read full definition.

Market Cap Range, Past 5 Years

View Market Cap Range, Past 5 Years
Start Trial
--
Minimum
--
Maximum
--
Average
--
Median

Market Cap Benchmarks

Market Cap Related Metrics