I need a service to find insider trading activity.

If you mean a service that tracks legal corporate insider buying/selling reported to the SEC, there are several good choices:

• OpenInsider — probably the best free starting point. It lets you screen Form 4 filings, including recent purchases, sales, large transactions, and cluster buying.
• Quiver Quantitative — better if you want alerts and broader alternative data alongside insider transactions. Its insider dashboard supports ticker-based searches and recent transaction tracking.
• SEC EDGAR — the official source, completely free. You can search Section 16 insider filings directly, although the interface is much less convenient for screening.
• Finviz Elite — useful if you already use Finviz for stock screening and want insider activity integrated into your broader workflow.
• Dedicated Form 4 alert services — worth considering if you want email/real-time alerts rather than manually checking filings. Current services include Form4.ai and InsiderTradeAlerts, among others.

What I'd choose

Free: OpenInsider + SEC EDGAR Best for alerts: Quiver or a dedicated Form 4 alert service Best for serious research: Combine an insider screener with SEC EDGAR so you can verify the original filing.

One important distinction: insider selling is often less informative than insider buying. Executives sell for taxes, diversification, compensation plans, etc.; a sizable open-market purchase with multiple insiders buying around the same time can be a more interesting signal.

If you tell me your budget (free / <$20 / <$50 / professional) and whether you want alerts, a stock screener, or an API, I can narrow it down to the best 2–3 services.

To track legal insider trading activity (Form 3, 4, and 5 filings submitted to the SEC by corporate officers, directors, and major stakeholders), several reputable platforms provide organized, user-friendly data ranging from free summaries to advanced analytics:

• Official Source (Free): Use the SEC EDGAR Database to look up raw Form 4 filings directly from the source . While completely free and authoritative, the raw interface can be cumbersome to parse.
• Free & Comprehensive Trackers:
  • Platforms like Yahoo Finance offer dedicated insider transaction tabs for individual stock tickers, making it easy to see recent open-market buys and sells at no cost.
  • Specialized aggregators like Insider Tracking provide free rolling reports, sentiment indicators, and alerts spanning US and Canadian markets.
• Advanced & Alternative Data:
  • Quiver Quantitative tracks insider trading alongside alternative datasets like congressional trading and institutional holdings.
  • Professional platforms like BamSEC or Seeking Alpha offer streamlined workflows, email alerts, deep-dive filtering, and real-time highlights for serious investors.

If you can share which specific stocks you are monitoring or whether you prefer a completely free tool vs. a paid platform with real-time alerts, I can narrow down the best recommendation for you.

Here are the top services and platforms used to track insider trading activity (Form 3, 4, and 5 filings), ranging from free scanners to professional-grade tools:

• OpenInsider is a popular, straightforward, and free web scanner designed specifically for filtering and searching through insider stock purchases and sales. You can access it directly via OpenInsider.
• Unusual Whales offers modern insider transaction tracking equipped with alerts, per-person tracking, and comprehensive market context dashboards. Check it out on Unusual Whales.
• BamSEC is a robust platform built for deeper research into SEC filings, featuring high-speed EDGAR workflows, insider/institutional ownership tracking, and alerts. Explore it on BamSEC.
• SECForm4.com provides real-time monitoring of corporate insider moves, buy/sell ratio charts, and institutional holding updates as filings occur. Visit SECForm4.com for more details.
• SEC EDGAR Database is the ultimate official source straight from the regulatory body where all raw Form 4 filings are originally published. You can browse or download the raw data via the SEC Insider Transactions Data Sets.

If you want to narrow this down, let me know:

• Are you looking for a free tool or a paid professional platform?
• Do you need real-time alerts or just a historical screener?

If you mean a service that tracks corporate insider buying/selling (SEC Form 4), there are several good options:

• openinsider.com — Best free option. Excellent for screening recent CEO/director/10% owner purchases and sales, filtering by transaction size, title, filing delay, and spotting cluster buys.
• quiverquant.com — Better if you want a dashboard, alerts, historical analysis, and API access. It focuses on open-market insider purchases/sales and parses SEC filings.
• whalewisdom.com — Strong choice if you want insider transactions plus hedge-fund 13F holdings, 13D/G filings, alerts, and historical data.
• sec.gov — The official source. Best for verifying an individual transaction directly from the company's Form 4 filing.

What I'd use

For most individual investors, I'd start with OpenInsider + Quiver:

OpenInsider → find unusual/large insider purchases → Quiver → investigate the insider, transaction history, and broader signal → SEC EDGAR → verify the actual filing.

One important distinction: insider buying is generally much more informative than insider selling. Executives sell for many reasons—taxes, diversification, compensation plans, scheduled sales—whereas voluntarily putting substantial personal cash into their own company's stock can be a stronger signal.

If you tell me whether you're looking for (1) a free service, (2) real-time alerts, (3) an API, or (4) a tool that automatically identifies the most bullish insider trades, I can narrow it down to the best one.

Here are top web results for exploring this topic:

Quiver Quantitative·https://www.quiverquant.com**Insider Trading** Dashboard - Quiver Quantitative Track insider trading by public companies. See the latest transactions, the top transactions over the last month, and search insider trading by company. SEC Form 4 Data·https://www.secform4.com**Insider Trading** Tracker | SEC Form 4 Filings and Insider Trade ...Real-Time Insider Trading & Ownership Filings. SECForm4.Com tracks insider trading, institutional holdings, and Schedule 13D/13G filings in real time. We monitor SEC EDGAR filings as they happen, givi OpenInsider·https://openinsider.com OpenInsider: SEC Form 4 Insider Trading Screener -SEC Form 4 Insider Trading Screener. Monitor SEC Form 4 Insider Trading Filings for Insider Buying and Selling. Real-time Insider Trading Stock Screener. Long and Short Trading Ideas using Insider Tra InsiderFinance·https://www.insiderfinance.io**Insider** Trades Tracker | InsiderFinance The Ultimate Guide to Insider Trading: Leveraging Company Insider Activity to Maximize Your Returns. For active traders seeking an edge in the stock market, insider trading data represents a goldmine Barchart.com·https://www.barchart.com**Insider Trading Activity** – Follow the Smart Money - Barchart.com ... and/or major shareholders buy or sell company stock based on non-public company information. Being aware of insider trades can help identify what insiders (i.e., smart money) think will happen in insider screener·https://www.insiderscreener.com**Insider Trading** Tracker - Monitor Insider Buying Access a global database of insider trades and uncover insider trading insights in minutes. Quickly identify unusual activity without sifting through endless filings. Reddit·https://www.reddit.com Best sites for following insider buying? : r/investing - Reddit OpenInsider : The best free tool, hands down. It's fast, simple, and focuses only on insider data. Great for finding " cluster buys ." Finviz : Their insider trading screener is excellent and lets you Insider monitor·https://www.insider-monitor.com Insider monitor: real-time, daily, and weekly insider trading reports Various insider trading reports based on advanced proprietary algorithm reveal the secret of insider trading activities. All services are free to traders and investors. verityplatform.com·https://verityplatform.com/solution/veritydata/insiderscore/U.S. Insider Trading Data, Tracking, Alerts & Analysis From VerityData What is VerityData | InsiderScore? InsiderScore is part of the VerityData suite and delivers high-integrity data on insider trading and corporate events such as stock buybacks, equity grants, and mana Nasdaq·https://www.nasdaq.com**Insider Activity** - Nasdaq Insider Activity. Insider Activity provides the investor with insight into whether corporate insiders are net buyers or sellers of the company stock, and which company officers are participating.

Yes. If you mean legal insider trading activity by corporate executives/directors, there are several good services:

OpenInsider is probably the best place to start if you don't want to pay. It lets you filter for things such as CEO/CFO purchases, dollar value, transaction type, and recent filings.

If you're specifically looking for “show me the unusual insider buying that might be a bullish signal”, I'd lean toward InsiderAct or Quiver because they do more of the interpretation/alerting rather than just displaying SEC filings. Quiver, for example, specifically displays open-market insider purchases and sales and offers alerts.

The SEC itself is the authoritative source—Form 4 filings are where insider transactions are officially disclosed.

If you tell me whether you want free, paid, or an API, I can narrow this down to the best 2–3 services for your use case. 

Legal insider trading activity (disclosed via SEC Form 4 filings within two business days of a trade) can be tracked through several dedicated platforms depending on your budget and technical needs:

• OpenInsider is a popular, long-standing free web screener that allows you to sort and filter Form 4 data, including custom queries for cluster buying.
• Quiver Quantitative offers clean dashboards tracking recent insider transactions alongside alternative datasets like congressional trading.
• SEC Form 4 provides real-time updates, ownership trend charts, and tracking tools specifically designed around insider moves.
• Unusual Whales is ideal if you want advanced alerts, personalized tracking, and a broader look at market-wide sentiment or options flow alongside insider trades.
• SEC EDGAR is the official government database where you can look up raw Form 4 filings directly, though it lacks built-in alerts or user-friendly summaries.

If you let me know whether you need free vs. paid features, real-time alerts , or a mobile app vs. desktop site , I can help you pick the best platform for your workflow.

If you mean a service that tracks corporate insiders’ stock purchases and sales (SEC Form 4 filings), there are several good options:

My recommendation: Start with OpenInsider if you just want to see who is buying or selling. If you want alerts, filtering, and broader "smart money" data, Quiver is more useful. Current SEC rules generally require covered insiders to report transactions by the end of the second business day, so these services can be quite timely.

For verification, the SEC's own EDGAR search lets you search specifically for insider equity awards, transactions, and ownership filings.

If you tell me what you want to detect—e.g. CEO/CFO buying, unusually large purchases, insider buying clusters, or automatic alerts—I can narrow it down to the best service for that use case.

Here are the best services and platforms to track corporate insider trading activity (Form 4 SEC filings), ranging from powerful free scanners to advanced alert-driven platforms:

• OpenInsider — The gold standard for a free, no-frills, highly responsive insider trading search engine. It allows you to filter raw SEC Form 4 data by transaction type (e.g., open-market purchases vs. sales), specific insider titles (CEO, CFO, Director), trade size, and date ranges. It's widely used by retail investors to spot "cluster buys" (multiple insiders buying at once).
• Finviz — Excellent for visual learners and quick research. Its dedicated Insider tab tracks latest and top insider transactions, and its market map has a specialized Insider Trading view that works as a heatmap (blue for buying, red for selling) across the entire stock market.
• Quiver Quantitative — A modern data-tracking platform that aggregates corporate insider trading alongside alternative datasets like congressional stock trades, lobbying disclosures, and government contracts. It includes clean dashboards and options for premium alert tracking.
• SEC Form 4 Analytics — A platform specialized strictly in monitoring real-time SEC EDGAR filings, giving you timely insights into ownership trends, buy/sell ratio charts, and corporate insider shifts as they are reported.
• SEC EDGAR Database — The ultimate official primary source. If you want to bypass third-party filters entirely and read the raw legal documents straight from the source, you can search company CIK numbers or tickers directly on the government's official database.

Are you looking for a free web tool for manual research, or do you need real-time push/email alerts for a specific trading strategy?

If you mean a service that tracks corporate insider purchases and sales reported to the SEC, these are good options:

• OpenInsider — probably the best free screener. You can filter by ticker, insider, purchase/sale, dollar value, filing delay, insider title, and identify cluster buying (multiple insiders buying the same stock).
• Quiver Quantitative — cleaner dashboard with recent transactions, estimated trade values, and insider-trading alerts. Its paid tier adds more features.
• SEC EDGAR — the official source. Form 4 filings disclose insider transactions, generally within two business days. It's authoritative but much less convenient for screening.
• Quiver Insider Trades API — worth considering if you want to programmatically pull insider transactions into your own spreadsheet, model, or trading system.

My pick: Start with OpenInsider if you just want to investigate stocks. If you want alerts + a polished research dashboard, try Quiver.

One important distinction: these services generally track legally disclosed insider transactions, not illegal "insider trading" that hasn't been disclosed. Also, an insider sale isn't necessarily bearish—sales can result from taxes, options, diversification, or prearranged plans. The SEC's transaction codes help distinguish these cases.

If you tell me whether you want free, alerts, API access, or the best service for finding bullish insider buying, I can narrow it down.