The U.S. Equities Shares Outstanding (Detailed) dataset provides a granular, event-level history of shares outstanding for U.S. exchange-listed equity securities. It extends the basic shares outstanding dataset by exposing additional metadata and change attribution, enabling deeper analysis of share count dynamics over time. In addition to core fields such as algoseek SecId, ticker symbol, effective date, and shares outstanding, the detailed dataset includes the security name, the change in shares outstanding relative to the prior value, a unique event identifier for each update, the security’s listing date, and the current security status (e.g., active, in default, or inactive). The dataset is updated continuously throughout the trading day, providing timely visibility into newly reported or revised share count changes. It is designed to support valuation modeling, capitalization analysis, regulatory reporting, and research workflows that require event-level explainability and precise share count attribution.