What EDGAR Is and Where to Start
The SEC's Electronic Data Gathering, Analysis, and Retrieval system, known as EDGAR, lives at sec.gov/cgi-bin/browse-edgar. Every public company is required to submit filings there, and the public can access every one of them for free, no account needed.
To find insider activity for a specific stock, go to EDGAR's company search, type in the ticker or company name, and pull up its filing history. From there, filter the filing type to Form 4. That single filter cuts through earnings reports, proxy statements, and everything else to show you only insider transaction disclosures.
Forms 3 and 5 exist in the same family. Form 3 is the initial ownership statement an insider files when they first become an insider. Form 5 is an annual catch-up for transactions that were eligible for deferred reporting. For day-to-day monitoring, Form 4 is where the action is, because insiders must file it within two business days of a transaction.
EDGAR full-text search. If you want to scan across all companies at once, EDGAR's full-text search at efts.sec.gov lets you search Form 4 filings by keyword, including a person's name or a specific company. It is slower to read but useful for tracking a known insider across multiple holdings.
How to Read a Form 4
A Form 4 is a two-page XML-rendered document that looks dense at first. Once you know the layout, it takes about thirty seconds to read.
The top section identifies the reporting person, their relationship to the company (director, officer, or 10-percent owner), and the company being reported on. The relationship line matters. A CEO buying shares carries a different signal than a board member receiving their annual equity grant.
The middle of the form is Table I for non-derivative securities (regular stock) and Table II for derivative securities (options and similar instruments). Most of the trades you care about are in Table I.
Transaction Codes: The Most Important Column
The transaction code is what separates a meaningful signal from routine compensation. Most filings use one of a handful of codes.
- P, Open-Market Purchase. The insider used their own money to buy shares on the open market. This is the code most investors pay attention to. There is no contractual reason to buy, so a P signals personal conviction.
- S, Open-Market Sale. Shares sold on the open market. Sales are harder to interpret because insiders sell for many reasons, including diversification, taxes, and personal expenses.
- A, Grant or Award. Shares or options received as compensation. This is not a purchase. The insider paid nothing out of pocket, so it says nothing about their view of the stock.
- M, Option Exercise. The insider exercised stock options, converting them to shares. Often paired with an S code on the same form because many insiders sell immediately after exercising to capture the spread.
- F, Tax Withholding. Shares withheld by the company to cover tax on a vesting event. This is a forced reduction in shares, not a discretionary sale.
- G, Gift. Shares transferred as a gift. No cash changes hands.
Do not conflate A and P. A filing with a large share count and code A means an executive received their annual equity package. It looks like a big position change but reveals no market view. Code P is the one that reflects a discretionary, out-of-pocket decision to buy.
Putting It Together
A useful Form 4 read looks like this: find a company, filter for Form 4s, open the most recent filing, check the reporting person's role, find Table I, read the transaction code, note the price and share count, and compare the post-transaction holdings to any prior filings to see if the position is growing or shrinking.
Cluster buys are worth extra attention. When multiple insiders file P-coded purchases within a short window, at similar prices, the signal is harder to dismiss as coincidence than a single buy.
Raw EDGAR filings are accurate but slow to scan across a watchlist. Tools like ChartRead aggregate Form 4 data into a readable feed with filters by transaction type, so you can scroll P-coded buys without opening individual filings. The underlying data is the same SEC source, just organized for faster review.
The short version: go to sec.gov, search the company, filter Form 4, find the transaction code column, and focus on P. Everything else is context that either strengthens or weakens that signal.
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