What is SEC Form 4?

Insider Trading Signals Every Trader Should Watch

What is a Form 4 filing?

SEC Form 4 is filed whenever a company insider (director, officer, or 10%+ shareholder) buys or sells shares. These filings must be submitted within 2 business days of the transaction, making them one of the fastest public signals of insider sentiment. When a CEO buys $500K of their own stock on the open market, that's a Form 4.

Why traders watch Form 4 filings

Insiders know their company better than any analyst. When multiple insiders buy simultaneously (a 'cluster buy'), it often precedes positive catalysts like earnings beats, FDA approvals, or M&A announcements. Academic research shows insider purchases outperform the market by 7-10% annually. Catalyst Edge scans every Form 4 filed with EDGAR and flags cluster buys automatically.

How to read a Form 4

The key fields are: Transaction Code (P = purchase, S = sale, A = award), shares transacted, price per share, and shares owned after the transaction. Open-market purchases (Code P) carry the strongest signal because insiders are spending their own money. Derivative transactions (options exercises) are less meaningful.

Form 4 vs Form 3 vs Form 5

Form 3 is the initial ownership report when someone becomes an insider. Form 4 reports changes in ownership. Form 5 is an annual summary of transactions that should have been reported on Form 4 but were exempt. For traders, Form 4 is the one that matters — it shows real-time insider activity.

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Frequently Asked Questions

How quickly do Form 4 filings appear on EDGAR?

Form 4 filings must be submitted within 2 business days of the transaction. Most appear on EDGAR within hours. Catalyst Edge checks EDGAR every 15 minutes during market hours.

Is insider buying always bullish?

Not always, but statistically it's a strong signal. Insider purchases outperform the market by 7-10% per year on average. The strongest signals come from cluster buys (multiple insiders buying within days) and large purchases relative to the insider's compensation.

What is a Form 4 cluster buy?

A cluster buy occurs when 3 or more insiders at the same company file Form 4 purchase reports within a 14-day window. Catalyst Edge automatically detects and flags these patterns.

Related Topics

What is Schedule 13D? · What is a Gap Up Stock? · SEC Filing Types for Traders · What is IPO Lockup Expiration? · Pre-Market Gap Scanner · Insider Buying Signals · What is a Sympathy Play? · What is Deep Value Investing?

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