How to track insider buying (SEC Form 4)
To track insider buying in US-listed companies, you read SEC Form 4 filings. A Form 4 is the report an insider must file when they trade their own company's stock, and it is due within two business days, which makes it one of the most current ownership disclosures available. The process is the same whether you follow one company or many: find the filings, read the transaction codes, and check them against their filing dates.
Definition
Tracking insider buying
means monitoring SEC Form 4 filings, which company officers, directors, and 10-percent owners must submit within two business days of trading their own stock. Each filing lists the date, shares, price, and a transaction code that shows whether it was an open-market purchase. Source: SEC EDGAR.
Where to find insider filings
Every Form 4 is public on SEC EDGAR, the SEC's filing system, which includes a full-text search. You can look up a single company's filers or search across companies. Because filing is mandatory and fast, EDGAR holds the primary record. Any tool that shows insider buying is reading these same filings, so the underlying data is identical to what you can pull yourself.
How to read a Form 4 for buying
The share count alone does not tell you what happened. Check these fields:
- The transaction code. An open-market purchase reads differently from a sale, an option exercise, or a gift. This is the single most important field.
- The price. A purchase at market price is a different fact from an option exercise at a set strike.
- The size relative to the existing holding. A small add to a large stake means something different from a first purchase.
- The date. Compare the transaction date to the filing date to confirm it is recent.
2 business days
Deadline for an insider to report a trade on Form 4
Source: SEC, Section 16 of the Securities Exchange Act
Insider buying versus institutional buying
Insider data and institutional data answer different questions. A Form 4 shows what one insider did this week. A 13F filing shows what a large manager held last quarter, up to 45 days late. If you want the mechanics of the insider filing itself, read what a Form 4 filing is. India runs a parallel regime under SEBI insider-trading disclosure rules, and for the quarterly manager view a 13F tracker decodes the institutional side.
Flock reads primary filings, dates each one, and links back to the source. What the data means for you is your call to make.
Frequently asked questions
Where can I see insider buying?
Insider trades in US-listed companies are reported on SEC Form 4 and are public on SEC EDGAR, including its full-text search. Insiders must file within two business days of the transaction, so the data is close to current. Source: SEC EDGAR.
How do I know if an insider actually bought stock?
Read the transaction code on the Form 4. An open-market purchase is coded differently from a sale, an option exercise, or a gift. The code, not just the share count, tells you what kind of transaction it was. Source: SEC.
How current is insider buying data?
Form 4 filings are due within two business days of the transaction, so insider data is far more current than a 13F, which lags up to 45 days. It is one of the fastest ownership disclosures on US markets. Source: SEC, Section 16.
Does insider buying tell you what happens next?
No. A Form 4 records a fact: an insider traded, on a date, at a price. It does not state intent or predict anything, and reading a recommendation into it is your interpretation, not the filing's. This is a factual guide, not advice. Source: SEC.
Flock tracks these filings, sourced, dated, and linked back to the original. See what smart-money entities disclosed, without the guesswork about what it means.
Disclosures shown are public regulatory filings. Data may be delayed or incomplete. Smart-money entities may no longer hold positions shown. Not investment advice.