Insider Transactions API

Retrieve insider trading data from SEC Form 4 filings. Track executive purchases, sales, option exercises, and ownership changes for any ticker.

Endpoint

GET /v2/insider-trading/{symbol}

Authentication

The API supports multiple authentication methods:

Method	Example
Bearer token (recommended)	Authorization: Bearer YOUR_API_KEY
X-API-Key header	X-API-Key: YOUR_API_KEY
Query parameter	?apiKey=YOUR_API_KEY
Legacy query parameter	?token=YOUR_API_KEY

Parameters

Path Parameters

Parameter	Type	Required	Description
symbol	string	Yes	Stock ticker symbol (e.g., AAPL, MSFT)

Query Parameters

Parameter	Type	Required	Description
startDate	string	No	Start date (YYYY-MM-DD)
endDate	string	No	End date (YYYY-MM-DD)
limit	integer	No	Maximum number of results to return

Request

Python SDK

from finbrain import FinBrainClient

fb = FinBrainClient(api_key="YOUR_API_KEY")

df = fb.insider_transactions.ticker("AAPL",
                                    date_from="2025-01-01",
                                    date_to="2025-06-30",
                                    as_dataframe=True)
print(df)

cURL

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.finbrain.tech/v2/insider-trading/AAPL"

Python (requests)

import requests

headers = {"Authorization": "Bearer YOUR_API_KEY"}

response = requests.get(
    "https://api.finbrain.tech/v2/insider-trading/AAPL",
    headers=headers,
    params={"limit": 10}
)
data = response.json()

for t in data["data"]["transactions"]:
    print(f"{t['date']} - {t['insider']}: {t['transactionType']} "
          f"({t['shares']} shares @ ${t['pricePerShare']:.2f})")

C++

#include <iostream>
#include <string>
#include <curl/curl.h>
#include <nlohmann/json.hpp>

using json = nlohmann::json;

size_t WriteCallback(void* contents, size_t size, size_t nmemb, std::string* userp) {
    userp->append((char*)contents, size * nmemb);
    return size * nmemb;
}

json get_insider_transactions(const std::string& symbol, const std::string& api_key) {
    CURL* curl = curl_easy_init();
    std::string response;

    if (curl) {
        std::string url = "https://api.finbrain.tech/v2/insider-trading/" + symbol;

        struct curl_slist* headers = nullptr;
        std::string auth_header = "Authorization: Bearer " + api_key;
        headers = curl_slist_append(headers, auth_header.c_str());

        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &response);
        curl_easy_perform(curl);
        curl_slist_free_all(headers);
        curl_easy_cleanup(curl);
    }

    return json::parse(response);
}

int main() {
    auto result = get_insider_transactions("AAPL", "YOUR_API_KEY");

    for (auto& t : result["data"]["transactions"]) {
        std::cout << t["date"].get<std::string>() << " - "
                  << t["insider"].get<std::string>() << ": "
                  << t["transactionType"].get<std::string>()
                  << " (" << t["shares"].get<int>() << " shares @ $"
                  << t["pricePerShare"].get<double>() << ")"
                  << std::endl;
    }

    return 0;
}

Rust

use reqwest::blocking::Client;
use serde::Deserialize;
use std::error::Error;

#[derive(Debug, Deserialize)]
struct Transaction {
    date: String,
    insider: String,
    relationship: String,
    #[serde(rename = "transactionType")]
    transaction_type: String,
    shares: i64,
    #[serde(rename = "pricePerShare")]
    price_per_share: f64,
    #[serde(rename = "totalValue")]
    total_value: i64,
    #[serde(rename = "sharesOwned")]
    shares_owned: i64,
    #[serde(rename = "filingUrl")]
    filing_url: String,
}

#[derive(Debug, Deserialize)]
struct InsiderData {
    symbol: String,
    name: String,
    transactions: Vec<Transaction>,
}

#[derive(Debug, Deserialize)]
struct InsiderResponse {
    success: bool,
    data: InsiderData,
}

fn get_insider_transactions(symbol: &str, api_key: &str)
    -> Result<InsiderResponse, Box<dyn Error>> {
    let url = format!(
        "https://api.finbrain.tech/v2/insider-trading/{}",
        symbol
    );

    let client = Client::new();
    let response: InsiderResponse = client
        .get(&url)
        .bearer_auth(api_key)
        .send()?
        .json()?;

    Ok(response)
}

fn main() -> Result<(), Box<dyn Error>> {
    let result = get_insider_transactions("AAPL", "YOUR_API_KEY")?;

    for t in &result.data.transactions {
        println!("{} - {}: {} ({} shares @ ${:.2})",
            t.date, t.insider, t.transaction_type, t.shares, t.price_per_share);
    }

    Ok(())
}

JavaScript

const response = await fetch(
  "https://api.finbrain.tech/v2/insider-trading/AAPL",
  { headers: { "Authorization": "Bearer YOUR_API_KEY" } }
);
const result = await response.json();

for (const t of result.data.transactions) {
  console.log(`${t.date} - ${t.insider}: ${t.transactionType} (${t.shares} shares @ $${t.pricePerShare})`);
}

Response

Success Response (200 OK)

{
  "success": true,
  "data": {
    "symbol": "AAPL",
    "name": "Apple Inc.",
    "transactions": [
      {
        "date": "2025-11-07",
        "insider": "KONDO CHRIS",
        "relationship": "Principal Accounting Officer",
        "transactionType": "Sale",
        "shares": 3752,
        "pricePerShare": 271.23,
        "totalValue": 1017655,
        "sharesOwned": 15098,
        "filingUrl": "http://www.sec.gov/Archives/edgar/data/320193/000163198225000011/xslF345X05/wk-form4_1762990206.xml"
      }
    ]
  },
  "meta": {
    "timestamp": "2026-01-19T15:06:21.699Z"
  }
}

Response Fields

Field	Type	Description
success	boolean	Whether the request was successful
data.symbol	string	Stock ticker symbol
data.name	string	Company name
data.transactions	array	Array of transaction objects
meta.timestamp	string	Response timestamp (ISO 8601)

Transaction Object Fields

Field	Type	Description
date	string	Transaction date (YYYY-MM-DD)
insider	string	Insider name
relationship	string	Insider’s role/relationship
transactionType	string	Type of transaction
shares	integer	Number of shares
pricePerShare	number	Transaction price per share
totalValue	integer	Total transaction value in USD
sharesOwned	integer	Total shares owned after transaction
filingUrl	string	Link to SEC Form 4 filing

Transaction Types

Type	Description
Buy	Open market purchase
Sale	Open market sell
Option Exercise	Stock option conversion
Gift	Shares donated
Automatic	10b5-1 plan execution

Errors

Code	Error	Description
400	Bad Request	Invalid symbol
401	Unauthorized	Invalid or missing API key
403	Forbidden	Authenticated, but not authorized to access this resource
404	Not Found	Ticker not found
429	Too Many Requests	Rate limit exceeded — wait and retry
500	Internal Server Error	Server-side error

Related

• Insider Transactions Dataset - Use cases and analysis examples
• House Trades - Congressional trading data
• Senate Trades - Senate trading data
• Ticker Predictions - Price predictions