SEC Form 4 Lookup: How to Find and Search Insider Trading Filings

What is a Form 4 Filing?

SEC Form 4 is the document that corporate insiders must file whenever they buy, sell, or otherwise change their ownership of company securities. Federal law requires these filings within two business days of the transaction, making them one of the most timely sources of information about what executives and directors are doing with their company's stock.

Every Form 4 is publicly available, meaning anyone can look up insider transactions for any publicly traded company in the United States.

How to Look Up Form 4 Filings

Option 1: Search by Company or Ticker

The fastest way to find insider trading activity for a specific stock is to search by ticker symbol. On InsiderAction.io, you can:

1. Use the search bar at the top of any page — type a ticker symbol (e.g., AAPL) or company name
2. Visit the ticker page directly (e.g., insideraction.io/ticker/AAPL) to see all insider transactions, ownership breakdowns, and activity charts
3. Use the transaction database to search and filter by sector, industry, transaction type, date range, and insider role

Option 2: Search by Insider Name

If you want to track a specific executive's trading activity across all companies:

1. Search by name using the search bar — insider names are searchable alongside company names
2. Visit their profile page to see their complete Form 4 filing history, holdings across all companies, and their Insider Signal Score
3. Compare their activity to other insiders at the same company

Option 3: Search on SEC EDGAR Directly

The SEC's EDGAR system is the official source. You can search at sec.gov/cgi-bin/browse-edgar by entering a company name or CIK (Central Index Key) number. However, EDGAR presents raw XML filings that can be difficult to read and don't offer filtering or analysis tools.

Understanding What You Find

When you look up Form 4 filings, you'll see several key pieces of information for each transaction:

Transaction Codes

The most important codes to know:

• P (Purchase) — Open market purchase. The insider spent their own money to buy shares. This is the most meaningful bullish signal.
• S (Sale) — Open market sale. The insider sold shares on the open market.
• A (Award/Grant) — Shares awarded as compensation. Not a market-driven decision.
• M (Exercise) — Option exercise. Often part of routine compensation.
• G (Gift) — Shares given away, often for tax planning.
• F (Tax) — Shares withheld to cover tax obligations on vesting equity.

For investment research, P (purchase) and S (sale) transactions are the most informative because they represent voluntary decisions to buy or sell at market prices.

Key Data Points

For each filing, look at:

• Transaction date — When the trade actually happened
• Filing date — When the Form 4 was submitted to the SEC (within 2 business days)
• Shares traded — How many shares were bought or sold
• Price per share — What price the insider paid or received
• Shares owned after — The insider's total position after the transaction

The Insider's Role

The filer's relationship to the company matters:

• CEO/CFO — Closest to operations, trades carry the most weight
• Directors — Board-level oversight, meaningful but less operationally connected
• VP/SVP — Division-level insights
• 10% Owner — Large shareholders, may be institutional investors with different motivations

Filtering and Analyzing Filings

Raw Form 4 data includes thousands of filings daily. The key is knowing how to filter:

By Transaction Type

Focus on open market purchases (P) and sales (S). The InsiderAction.io database lets you toggle between buy/sell only and all transaction types.

By Date Range

Recent transactions are more relevant than old ones. Most analysis focuses on the last 30-90 days, though historical patterns can be useful for context.

By Sector or Industry

Compare insider activity across similar companies. Our sector pages aggregate insider transactions by GICS classification, making it easy to spot which industries are seeing the most insider buying.

By Insider Type

Filter by role (officer, director, 10% owner) to focus on the insiders with the deepest knowledge of company operations.

By Transaction Size

Large-dollar purchases carry more weight than small ones. A CEO spending $1 million of their own money sends a different message than a director buying $5,000 in shares.

Common Form 4 Lookup Scenarios

"Is the CEO buying or selling?"

Search for the company ticker, then look at recent transactions. Check whether the CEO's trades are open market purchases (bullish signal) or compensation-related (less meaningful).

"Are insiders buying before earnings?"

Look at the transaction dates relative to the company's earnings announcement date. Note that insiders are typically restricted from trading during "quiet periods" before earnings, so buying just before an announcement is unusual and may indicate the insider traded before the quiet period began.

"What are insiders doing across a whole sector?"

Visit the sector overview page to see aggregated insider buying and selling across all companies in a GICS sector. Drill into specific industries for a more granular view.

"Which insiders have the best track records?"

Our Insider Signal Scores page ranks insiders by their historical trading accuracy, so you can focus on the insiders whose past purchases have been followed by positive returns.

Tips for Effective Form 4 Research

1. Focus on open market purchases — these require insiders to spend their own cash and are the strongest signal
2. Look for patterns — a single filing is a data point; repeated buying or cluster buying is a signal
3. Check the insider's history — has this person been an accurate buyer in the past?
4. Compare to peers — is this company the only one in its industry with insider buying, or is it an industry-wide trend?
5. Combine with fundamentals — insider buying confirms your thesis, but shouldn't be the only reason to invest
6. Act on fresh data — filings that are weeks old may already be priced in

Conclusion

Looking up SEC Form 4 filings is straightforward — the data is public and freely available. The challenge is filtering the signal from the noise. By focusing on open market purchases, considering the insider's role and track record, and putting transactions in context, you can use Form 4 data as a valuable input to your investment research.

Start with our transaction database to search and filter filings, or browse the dashboard for the latest activity.