COSTCO WHOLESALE CORP /NEW (COST) Insider Transactions API

Code Snippets

curl "https://financialdata.net/api/v1/insider-transactions?identifier=COST&key=API_KEY"

import requests

url = 'https://financialdata.net/api/v1/insider-transactions?identifier=COST&key=API_KEY'
response = requests.get(url)

print(response.json())

const url = 'https://financialdata.net/api/v1/insider-transactions?identifier=COST&key=API_KEY';

const response = await fetch(url);
const data = await response.json();

console.log(data);

Sample Response

[
  {
    "trading_symbol": "COST",
    "central_index_key": "0000909832",
    "registrant_name": "COSTCO WHOLESALE CORP /NEW",
    "insider_name": "Wilcox William Richard",
    "insider_central_index_key": "0002087546",
    "relationship_to_issuer": "Executive Vice President",
    "is_derivatives_transaction": false,
    "title_of_security": "Common Stock",
    "transaction_date": "2026-10-13",
    "transaction_code": "S",
    "transaction_description": "Open market or private sale of non-derivative or derivative security",
    "amount_of_securities": 1100,
    "price_per_security": 958.205,
    "acquired_or_disposed": "D",
    "title_of_underlying_security": null,
    "amount_of_underlying_securities": null,
    "securities_owned_following_transaction": 3094,
    "ownership_form": "D",
    "nature_of_indirect_ownership": null
  },
  ...
]

Query Parameters

Name	Type	Description
identifier	string	The trading symbol for a security, or the central index key (CIK). The latter is assigned to the entity by the United States Securities and Exchange Commission. (e.g., `MSFT, 0000789019`)
offset	integer	(Optional) The initial position of the record subset, which indicates how many records to skip. Defaults to 0. (e.g., `50`)
format	string	(Optional) The format of the returned data, either JSON or CSV. Defaults to JSON. (e.g., `json, csv`)

Endpoint Overview

Federal securities laws require insiders, including officials, directors, and those holding more than 10% of a company's securities, to report their purchases, sales, and holdings. The API endpoint gives comprehensive information about each of the transactions. The data is available for a few thousand US companies. There is a limit of 50 records per API call.

Company Profile