Insider trading API: every SEC Form 4 trade as clean JSON
Insidewell reads every Form 4 from SEC EDGAR about once a minute and returns it as one clean row: ticker, insider, role, buy or sale, shares, price, dollar value, shares owned after, the 10b5-1 flag and the filing link. Filter by ticker, insider, transaction code, minimum value and dates, or ask for cluster buys (2+ insiders buying within 7 days). REST API and a remote MCP server for AI agents.
Largest open-market insider buys in Form 4s filed 24-29 Sep 2026
| Ticker | Company | Insider | Role | Bought (total) | Trade dates |
|---|---|---|---|---|---|
| LEN | Lennar | Berkshire Hathaway | 10% owner | $136.4M (9 trades) | 23-25 Sep |
| CRBG | Corebridge Financial | Nippon Life Insurance | 10% owner | $32.6M (5 trades) | 22-25 Sep |
| GPI | Group 1 Automotive | Conifer Management | 10% owner | $31.5M (13 trades) | 24-25 Sep |
| ADRX | ADARx Pharmaceuticals | SR One Capital / George Simeon (joint filing) | 10% owner, director | $17.1M | 28 Sep |
| COUR | Coursera | Pale Fire Capital | 10% owner | $11.4M (2 trades) | 25-29 Sep |
| GME | GameStop | Ryan Cohen | CEO and chairman | $10.6M (2 trades) | 29 Sep |
| GSHD | Goosehead Insurance | Durable Capital Partners | 10% owner | $7.1M | 22 Sep |
| CX | CEMEX | Rogelio Zambrano Lozano | Director | $6.9M | 25 Sep |
Source: SEC EDGAR daily form index 24-29 Sep 2026 (1,447 Form 4/4A filings) parsed with Insidewell's own Form 4 parser on 1 Oct 2026; open-market purchases (code P) only, summed per insider. Information only, not investment advice.
Insidewell vs the alternatives
Published prices, each checked on the date shown; prices change, so confirm on each site.
| Product | Price | Free | Checked |
|---|---|---|---|
| Insidewell API | $19/month for 10,000 calls (up to 100 trades each); $5 once for 2,000 | 100 calls every day, no key | live |
| sec-api.io | $55/month ($49/month billed yearly), Insider Trading API in every plan | first 100 API calls | 2026-09-30 |
| Financial Modeling Prep | Starter $19/month billed yearly; insider trades full access from Starter | 250 calls/day, insider trades limited | 2026-09-30 |
| EODHD | insider transactions only in Equity Analyst $59.99/month or All-in-One $99.99/month | 20 calls/day, no insider data | 2026-09-30 |
| Apify: scrapemint SEC Form 4 tracker | $0.025 per filing row (pay per event) | Apify free credit | 2026-09-30 |
Why teams pick Insidewell
- Entry price at FMP's $19 point and well under sec-api.io's $55 and EODHD's $59.99 for insider data.
- A free tier every day (100 calls), not a one-time trial: build and test on real data before you pay.
- Insider data is the whole product, not one endpoint in a bundle: cluster buys, 10b5-1 flags, role and shares owned after on every row.
- Instant key after Stripe checkout, no account; cancel any time. Same key on the REST API and the MCP server.
Try it in one call
curl 'https://insidewell-api.cybermax-tools.workers.dev/api/trades?code=P&minValue=1000000&days=7'FAQ
Is there a free insider trading API?
Yes: Insidewell gives 100 calls a day with no key and no card, each returning up to 100 trades. SEC EDGAR itself is free but returns raw XML filings you have to parse; Insidewell does that for you.
Why not sec-api.io?
sec-api.io is a broad SEC data platform starting at $55/month. If you only need insider trades (Forms 3/4/5), Insidewell covers them for $19/month with a daily free tier. If you need full-text search of every SEC form, sec-api.io does more.
How fresh is the data?
Insidewell polls EDGAR about once a minute, so a Form 4 appears minutes after the SEC publishes it.
Is this investment advice?
No. It is public SEC filing data, reformatted. Information only, not investment advice.