FASTENAL CO (FAST) Short Interest API

• cURL
• Python
• JavaScript

curl "https://financialdata.net/api/v1/short-interest?identifier=FAST&key=API_KEY"

import requests

                                                url = 'https://financialdata.net/api/v1/short-interest?identifier=FAST&key=API_KEY'    
                                                response = requests.get(url)

                                                print(response.json())
                                            

const url = 'https://financialdata.net/api/v1/short-interest?identifier=FAST&key=API_KEY';
                                            
                                                const response = await fetch(url);
                                                const data = await response.json();

                                                console.log(data);
                                            

[
  {
    "trading_symbol": "FAST",
    "title_of_security": "Fastenal Company Common Stock",
    "market_code": "NNM",
    "settlement_date": "2026-09-30",
    "shorted_securities": 34618329,
    "previous_shorted_securities": 35653332,
    "change_in_shorted_securities": -1035003,
    "percentage_change_in_shorted_securities": -2.9,
    "average_daily_volume": 7533208,
    "days_to_cover": 4.6,
    "is_stock_split": false
  },
  ...
]

Short interest represents the number of shares of a company that are currently sold short and have not yet been covered. The short interest ratio, also known as days to cover, represents the number of days it would take for all short-sold shares to be covered or repurchased in the market. Our API provides short interest data for over 15,000 securities. There is a limit of 100 records per API call.