The QuantQuote Historical Stock Splits API provides a complete record of stock split events for US-listed equities. Stock splits alter the number of shares outstanding and the per-share price without changing the company's total market capitalisation. Accurate split data is critical for adjusting historical price series, calculating true returns, and ensuring that backtesting engines handle corporate actions correctly.
Each record includes the execution date and the split ratio. For example, a 4-for-1 split is represented as a ratio of 4.0, meaning each existing share became four shares. Reverse splits are represented as fractional ratios (e.g., 0.5 for a 1-for-2 reverse split). Data is returned in JSON or CSV format via a simple REST endpoint.
Fetch stock split history for AAPL.
Click Generate JSON to fetch AAPL stock split history.
Each record in the splits_data array contains the following fields.
| Field | Name | Description |
|---|---|---|
| execution_date | Execution Date | The date on which the stock split takes effect and shares are adjusted in shareholder accounts. |
| split_ratio | Split Ratio | The ratio of new shares to old shares. For example, 4.0 means a 4-for-1 split where each existing share becomes four shares. Fractional values indicate reverse splits. |