> For the complete documentation index, see [llms.txt](https://docs.alphanume.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.alphanume.com/documentation/datasets/historical-market-cap.md).

# Historical Market Cap

The Historical Market Cap dataset provides a clean, point-in-time view of equity size over time. 

It tracks historical shares outstanding by ticker and date, allowing users to reconstruct market capitalization using information available at each moment in time.

The dataset is designed to support **survivorship-safe** research, universe construction, and market cap–based analysis without forward-looking bias.

Use the sections below to learn:

* what the dataset represents and how it’s constructed
* how to discover available tickers and valid date ranges
* how to query historical market cap data correctly
* the structure and meaning of each field
* how and when the data is updated