The SEC EDGAR Guide
for Investors
Every public company is legally required to file with the SEC. These filings contain the most important facts about a company — before they appear anywhere else. This guide explains what each filing means, how to read it, and what it signals for the stock.
SEC filings are written by lawyers, for regulators. A single 8-K can run 40 pages. A 10-K can exceed 200 pages. BullishAgent reads every filing and distills it into one sentence — the fact that actually matters for investors.
What is SEC EDGAR?
EDGAR (Electronic Data Gathering, Analysis, and Retrieval) is the SEC's public database of all filings made by U.S.-listed public companies. Every NYSE and Nasdaq company is legally required to file — and the penalties for omission are severe. That makes EDGAR the most reliable source of corporate information that exists.
Unlike news articles or analyst reports, EDGAR filings are primary sources. A CEO departure, a completed acquisition, a missed filing deadline, an activist investor taking a 5%+ stake — all must be disclosed in EDGAR before they can appear anywhere else. No spin. No interpretation. Legally accountable facts.
The challenge: the SEC's own EDGAR interface is designed for regulators, not investors. It returns raw legal documents, difficult to navigate and hard to interpret. BullishAgent's EDGAR intelligence layer reads these filings automatically and surfaces only what matters.
Common SEC Filing Types
| Form | Description | Frequency | Key Information |
|---|---|---|---|
| 10-K | Annual report | Annual | Comprehensive financial statements, business description, risk factors, MD&A |
| 10-Q | Quarterly report | Quarterly | Interim financials, material updates since last 10-K |
| 8-K | Current report | As needed | Material events: acquisitions, executive changes, bankruptcy, cybersecurity |
| NT 10-K | Late annual report | As needed | Company cannot file on time — often signals accounting or audit problems |
| NT 10-Q | Late quarterly report | As needed | Same as NT 10-K but for quarterly filings — treat as a red flag |
| DEF 14A | Proxy statement | Annual | Executive compensation, board members, shareholder proposals |
| Form | Description | When filed | Key Information |
|---|---|---|---|
| S-1 | IPO registration | Before IPO | Full business description, audited financials, risk factors, use of proceeds |
| S-1/A | IPO registration amendment | During SEC review | Updated terms, revised pricing range, responses to SEC comments |
| S-3 | Shelf registration | Before any offering | Pre-approves a pool of securities to sell over 3 years — the "loaded gun" |
| 424B4 | IPO / firm-commitment prospectus | Pricing day | Final offering price and share count — sets the hard floor level |
| 424B5 | Shelf / ATM prospectus supplement | Each drawdown | Specific terms of a shelf drawdown or ATM offering off an existing S-3 |
| 424B3 | Resale prospectus | When insiders sell | Existing shareholders registering shares to sell — supply, not new dilution |
| Form | Description | Filed By | Key Information |
|---|---|---|---|
| Form 3 | Initial ownership | New insiders | Baseline position when first becoming an insider or director |
| Form 4 | Changes in ownership | Insiders | Every purchase, sale, option exercise — filed within 2 business days |
| Form 5 | Annual ownership | Insiders | Catch-up for exempt transactions not reported on Form 4 during the year |
| 13F | Quarterly holdings | Funds ($100M+) | Full portfolio snapshot for every fund managing over $100M — 45 days after quarter end |
| SC 13D | Activist stake (5%+) | 5%+ shareholders | Intent to influence the company — M&A, board seats, restructuring |
| SC 13G | Passive stake (5%+) | 5%+ shareholders | Large passive position with no intent to control — index funds, long-term holders |
Why do EDGAR filings matter for stock prices?
Because they contain facts the market hasn't priced yet — or facts that confirm what the market already suspects. An 8-K announcing a CEO departure moves a stock the morning it's filed. A Form 4 showing a CEO buying $2M of their own stock is a powerful signal most retail investors never see. A late filing notice (NT 10-K) warns of accounting problems before they become public news.
The investors and traders who monitor EDGAR systematically have a consistent information advantage. BullishAgent makes that advantage available to everyone.
How BullishAgent Reads EDGAR
Every filing on EDGAR goes through BullishAgent's intelligence pipeline automatically — no human reads each document. Here is how a 200-page legal filing becomes a one-sentence AI summary.
Monitors the SEC EDGAR RSS feed and API for new filings across 9 form types: 8-K, SC 13D, SC 13G, SC TO-T, S-4, NT 10-K, NT 10-Q, Form 4, and more.
Downloads the full filing text (first 150KB). This always contains the main filing body and any attached exhibits referenced in the document.
Scans for Item X.XX section patterns in 8-K filings. Assigns the highest-impact item as the primary classification. Scores impact 1 (Medium), 2 (High), or 3 (Very High).
Identifies the company in two passes: first by exchange tags (NYSE: XYZ), then by company name matching against all known public company names in the database.
Feeds the relevant filing section to Claude AI, which generates one clean factual sentence — the BullishAgent Intelligence summary. No jargon, no opinion, no spin.
Published to the Filings feed, each stock's page, and surfaced in The Open morning brief when the impact score warrants it.