# InsiderRadar

> Public filings by company insiders and people in power, collected from official registers, classified and shown as facts with a link to the source filing.

InsiderRadar reads insider transactions reported to the Dutch AFM, the US SEC, the German BaFin, the Belgian FSMA, the Swedish FI and the Spanish CNMV, trades reported by members of the U.S. Congress, the financial disclosures of the U.S. President and Vice President, the quarterly 13F holdings of large fund managers, U.S. lobbying filings and European short positions. Dutch insider purchases also carry a deterministic Insider Score; the methodology page explains how it is calculated and what it does not say.

Free, without an account: the five newest rows of every list, each strategy's return, chart and key figures, the methodology and the news. Everything else is Pro.

The read API (JSON, SEC Form 4) comes with Pro; its documentation and keys are on the account page after signing in. It is also sold on its own: €9.99 per month incl. VAT, 10,000 calls per day.

## Insider trades

- [Insider Trades](https://www.insiderradar.nl/transactions): Transactions that company insiders reported to the Dutch AFM, the US SEC, the German BaFin, the Belgian FSMA, the Swedish FI and the Spanish CNMV (SEC Form 4 in the US, MAR article 19 in Europe), in one list with a filter per register.
- [Filer pages](https://www.insiderradar.nl/insider): Insiders who reported open-market purchases of their own company's shares, with a page per filer and per company.
- [Buyer clusters](https://www.insiderradar.nl/clusters): Days on which three or more insiders of the same listed company had reported an open-market purchase within a rolling 90-day window.
- [Buying streaks](https://www.insiderradar.nl/streaks): Insiders who reported a purchase of the same company on three or more consecutive filing days, without a reported sale in between.

## Politicians and government

- [Congress Trading](https://www.insiderradar.nl/investors): Trades that members of the U.S. House and Senate reported under the STOCK Act, searchable by politician, chamber or stock.
- [Politician Search](https://www.insiderradar.nl/congress): Every member of Congress with a STOCK Act filing, with a page per member.
- [2026 Midterm Elections](https://www.insiderradar.nl/datasets/midterms): Members of Congress whose seat is on the ballot on November 3, 2026, with the trades each reported in the months before the vote.
- [Donald Trump stock trades](https://www.insiderradar.nl/executive): The financial disclosure filings of the U.S. President and Vice President at the Office of Government Ethics (OGE), with the transactions inside them as read by Open Cabinet, a third party.

## Funds, lobbying and short positions

- [Hedge Funds](https://www.insiderradar.nl/funds): The quarterly 13F holdings that large US fund managers report to the SEC: new, enlarged and closed positions per manager.
- [Corporate Lobbying](https://www.insiderradar.nl/datasets/lobbying): LD-2 filings under the U.S. Lobbying Disclosure Act (client, registrant, amount and issues), with a page per linked company.
- [European Short Positions](https://www.insiderradar.nl/datasets/short-positions): Net short positions of 0.5% or more in listed companies, as published by the regulators of the Netherlands, France, Sweden, Ireland and Spain.

## Method and results

- [Methodology](https://www.insiderradar.nl/methodology): How filings are classified and scored, what those figures do and do not say, and where the data falls short.
- [News](https://www.insiderradar.nl/news): What happened after earlier filings: price milestones, late filings, short positions and the weekly numbers.
- [Guides](https://www.insiderradar.nl/guides): Plain-language guides to the rules behind the registers: MAR Article 19, PDMRs and closed periods, the national rules in five EU countries, EU short positions, SEC Forms 3, 4 and 5, 10b5-1 plans, 13F, US lobbying, OGE reports and the STOCK Act, how EU and US rules compare, how often filings are late, the Dutch registers in numbers, and which members of Congress trade the most.
- [What is a MAR Article 19 notification?](https://www.insiderradar.nl/guides/mar-article-19): Who must report a directors' dealing in the EU, by when, above which threshold, and what the notification says.
- [How to read an SEC Form 4](https://www.insiderradar.nl/guides/sec-form-4): Who files a Form 4, the deadline, the two tables, the transaction codes and the trading-plan checkbox.
- [What members of Congress must disclose about their trades](https://www.insiderradar.nl/guides/stock-act-congress): The STOCK Act's periodic transaction report: the deadlines, the threshold, the amount ranges and what is left out.
- [When does an insider have to report a trade in Netherlands?](https://www.insiderradar.nl/guides/insider-reporting-netherlands): Who reports to the AFM, the three-day deadline, the €20,000 threshold and the extra Wft duty for board members.
- [When does an insider have to report a trade in Germany?](https://www.insiderradar.nl/guides/insider-reporting-germany): Who reports to the BaFin, the three-day deadline, the €50,000 threshold since 1 January 2026.
- [When does an insider have to report a trade in Belgium?](https://www.insiderradar.nl/guides/insider-reporting-belgium): Who reports to the FSMA, the three-day deadline, the €20,000 threshold and the issuer's confirmation in eMT.
- [When does an insider have to report a trade in Sweden?](https://www.insiderradar.nl/guides/insider-reporting-sweden): Who reports to FI, the three-day deadline, the €20,000 threshold and the insider register.
- [When does an insider have to report a trade in Spain?](https://www.insiderradar.nl/guides/insider-reporting-spain): Who reports to the CNMV, the three-day deadline, the €20,000 threshold and publication by the CNMV.
- [What is a closed period?](https://www.insiderradar.nl/guides/closed-period): The window before an EU company's results when its managers may not trade, the exceptions, the Listing Act changes and US blackout periods.
- [What is a PDMR?](https://www.insiderradar.nl/guides/pdmr): Who counts as a person discharging managerial responsibilities under MAR, who is closely associated with them, and what duties follow.
- [Form 3, 4 and 5: what's the difference?](https://www.insiderradar.nl/guides/sec-forms-3-4-5): When a US insider files each of the three SEC insider forms, by which deadline, and what each one reports.
- [What is a 10b5-1 plan?](https://www.insiderradar.nl/guides/rule-10b5-1-plan): The SEC rule for pre-arranged insider trades, the later changes and the checkbox on Form 4 and Form 5.
- [How to read a 13F filing](https://www.insiderradar.nl/guides/how-to-read-13f): Who files Form 13F, the 45-day delay, what the holdings table shows, and what it leaves out: shorts, cash and small positions.
- [How does US lobbying disclosure work?](https://www.insiderradar.nl/guides/us-lobbying-disclosure): Registration on LD-1, the quarterly LD-2 with amounts rounded to $10,000, and the twice-yearly LD-203 contribution report.
- [What must the President and senior officials disclose?](https://www.insiderradar.nl/guides/oge-financial-disclosure): OGE Form 278e and its due dates, and the 278-T report of trades over $1,000 within 30 or 45 days.
- [Short positions in Europe: what is the 0.5% rule?](https://www.insiderradar.nl/guides/eu-short-positions): The EU Short Selling Regulation: notify the regulator from 0.1%, public from 0.5%, by 15:30 the next trading day.
- [Insider reporting in the EU vs the US: what's different?](https://www.insiderradar.nl/guides/insider-reporting-eu-vs-us): MAR Article 19 next to Section 16: who reports, the three-day and two-day deadlines, the thresholds and who publishes.
- [Directors' dealings vs insider trading: what is legal?](https://www.insiderradar.nl/guides/directors-dealings-vs-insider-trading): A reported trade next to the ban on trading with inside information under MAR Article 14 and Rule 10b-5, with the penalties.
- [How often are insider filings late?](https://www.insiderradar.nl/guides/late-filings-in-numbers): Per register and year, how many Form 4 filings, Congress trade reports and German and Spanish notifications arrived after the legal deadline.
- [How many insider trades are reported in the Netherlands?](https://www.insiderradar.nl/guides/netherlands-insider-trading-in-numbers): Entries in the two AFM registers per year, the number of companies, open-market buys and sales, and the trades per sector in the last full year.
- [Which members of Congress trade the most?](https://www.insiderradar.nl/guides/congress-top-traders): The members with the most reported trade lines in the last full calendar year, with purchases, sales and the amount ranges as filed.
- [Why do insiders sell stock?](https://www.insiderradar.nl/guides/why-do-insiders-sell-stock): The common reasons for insider sales (pay in shares, tax, spreading risk, 10b5-1 plans) and what two studies of US filings found about sales.
- [Form 4 transaction codes explained](https://www.insiderradar.nl/guides/form-4-transaction-codes): All twenty transaction codes of SEC Form 4 in one table, with their meaning from the SEC instructions.
- [What is cluster buying?](https://www.insiderradar.nl/guides/what-is-cluster-buying): Several insiders of one company buying within 90 days: how this site counts a cluster and who counts as one buyer.
- [How to track insider trades for free](https://www.insiderradar.nl/guides/track-insider-trades-for-free): The official free registers (SEC EDGAR, AFM, BaFin, FSMA, FI, CNMV) and what each one lets you search and download.
- [Do insider purchases predict stock returns?](https://www.insiderradar.nl/guides/do-insider-purchases-predict-returns): What studies of US, UK and German filings found about returns after insider purchases and sales, per study with market, period and result, and the limits.
- [Can members of Congress trade stocks?](https://www.insiderradar.nl/guides/can-members-of-congress-trade-stocks): What the STOCK Act allows and requires, the 45-day deadline and the late fee, and the status of three bills to ban trading.
- [Do politicians beat the market?](https://www.insiderradar.nl/guides/do-politicians-beat-the-market): Five studies of the stock returns of US senators and representatives, and why their results differ.
- [What stocks does Trump own?](https://www.insiderradar.nl/guides/what-stocks-does-trump-own): Where the President's holdings are reported (OGE Form 278e and 278-T), the value ranges the law sets, and what the forms leave out.
- [Biggest insider purchases in Europe this year](https://www.insiderradar.nl/guides/biggest-insider-purchases-europe): The largest open-market purchases this year in five EU registers, one per company, in euros at the ECB rate of the trade date.
- [When do insiders buy? Purchases by month](https://www.insiderradar.nl/guides/when-do-insiders-buy): Open-market purchases and sales per calendar month in the Dutch, Swedish and Spanish registers, and how closed periods fit in.
- [What is Berkshire Hathaway buying?](https://www.insiderradar.nl/guides/what-is-berkshire-hathaway-buying): Berkshire Hathaway's largest holdings from its latest Form 13F, how many positions changed against the quarter before, and what a 13F leaves out.
- [Major shareholdings in the EU: the 3% and 5% rule](https://www.insiderradar.nl/guides/major-shareholdings-eu): The Transparency Directive thresholds, the lower national ones in the Netherlands, Germany, Belgium and Sweden, the deadlines, and the US rules for stakes above 5%.
- [Companies A–Z](https://www.insiderradar.nl/companies): Every company with a page on this site, by letter, with its register and ticker or ISIN.
- [Companies: A](https://www.insiderradar.nl/companies/a): Company pages starting with A.
- [Companies: B](https://www.insiderradar.nl/companies/b): Company pages starting with B.
- [Companies: C](https://www.insiderradar.nl/companies/c): Company pages starting with C.
- [Companies: D](https://www.insiderradar.nl/companies/d): Company pages starting with D.
- [Companies: E](https://www.insiderradar.nl/companies/e): Company pages starting with E.
- [Companies: F](https://www.insiderradar.nl/companies/f): Company pages starting with F.
- [Companies: G](https://www.insiderradar.nl/companies/g): Company pages starting with G.
- [Companies: H](https://www.insiderradar.nl/companies/h): Company pages starting with H.
- [Companies: I](https://www.insiderradar.nl/companies/i): Company pages starting with I.
- [Companies: J](https://www.insiderradar.nl/companies/j): Company pages starting with J.
- [Companies: K](https://www.insiderradar.nl/companies/k): Company pages starting with K.
- [Companies: L](https://www.insiderradar.nl/companies/l): Company pages starting with L.
- [Companies: M](https://www.insiderradar.nl/companies/m): Company pages starting with M.
- [Companies: N](https://www.insiderradar.nl/companies/n): Company pages starting with N.
- [Companies: O](https://www.insiderradar.nl/companies/o): Company pages starting with O.
- [Companies: P](https://www.insiderradar.nl/companies/p): Company pages starting with P.
- [Companies: Q](https://www.insiderradar.nl/companies/q): Company pages starting with Q.
- [Companies: R](https://www.insiderradar.nl/companies/r): Company pages starting with R.
- [Companies: S](https://www.insiderradar.nl/companies/s): Company pages starting with S.
- [Companies: T](https://www.insiderradar.nl/companies/t): Company pages starting with T.
- [Companies: U](https://www.insiderradar.nl/companies/u): Company pages starting with U.
- [Companies: V](https://www.insiderradar.nl/companies/v): Company pages starting with V.
- [Companies: W](https://www.insiderradar.nl/companies/w): Company pages starting with W.
- [Companies: X](https://www.insiderradar.nl/companies/x): Company pages starting with X.
- [Companies: Y](https://www.insiderradar.nl/companies/y): Company pages starting with Y.
- [Companies: Z](https://www.insiderradar.nl/companies/z): Company pages starting with Z.
- [Companies: 0–9](https://www.insiderradar.nl/companies/0-9): Company pages starting with 0–9.

## Strategies

- [Strategies](https://www.insiderradar.nl/strategies): Rules over the whole data layer, each backtested against an index under one set of assumptions; return, chart and key figures are free, positions are Pro.
- [Congress Buys](https://www.insiderradar.nl/strategies/house-buys): The ten companies members of the U.S. Congress reported buying most over the last 90 days, equally weighted, re-ranked every Monday.
- [Insider Purchases](https://www.insiderradar.nl/strategies/insider-purchases): The ten companies whose insider purchases carry the heaviest Insider Score right now, weighted so that a filing counts half after 45 days, equally weighted and re-ranked every Monday.
- [Insider Sellers Momentum](https://www.insiderradar.nl/strategies/insider-sellers-momentum): The twenty strongest U.S. risers of the past year among the 1,000 most traded stocks, with companies whose insiders were net sellers put first; equally weighted, rebuilt on the first Monday of every month.
- [Insiders EU](https://www.insiderradar.nl/strategies/insiders-eu): The ten European companies with the largest insider purchases from directors and senior managers buying their own shares for the first time in two years, counted over the past six months; equally weighted, re-ranked every Monday.

## Pricing and access

- [Insider trading data in Claude and ChatGPT (MCP)](https://www.insiderradar.nl/guides/insider-data-in-claude-and-chatgpt): How to connect the MCP server to Claude, ChatGPT or Claude Code, the sign-in steps, and what each of the six read-only tools returns.
- [Pricing](https://www.insiderradar.nl/pricing): Pro costs €49.95 per month incl. VAT, or €509.49 per year (15% off); it opens every list, the full history, strategy positions, Featured trades, alerts, CSV export and an API key.
- [MCP server](https://www.insiderradar.nl/api/mcp): Six read-only tools: insider transactions (SEC Form 4 from 2020, and the Dutch, German, Belgian, Swedish and Spanish registers), a summary per company or insider and the companies with the most insider buying or selling (Form 4), trades by members of Congress and the President, the 13F holdings of followed funds, and lobbying by listed US companies. Every row names its source. ChatGPT and the Claude app sign in with OAuth, other clients send an API key of an active subscription.

## Optional

- [Home](https://www.insiderradar.nl/): The newest filings across the registers, five per list.
- [About](https://www.insiderradar.nl/about): What InsiderRadar is, who is behind it, and where the data comes from.
- [Privacy](https://www.insiderradar.nl/privacy): What InsiderRadar keeps about its users and why.
- [Terms](https://www.insiderradar.nl/terms): The terms of use, including what a subscription does and does not give.