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For a U.S. public company, start with its latest Form 10-K, latest Form 10-Q, and relevant Form 8-K filings in the SEC’s free EDGAR database. Use them to understand how the company makes money, whether earnings are supported by its financial position and cash flows, what risks it discloses, and how its share price compares with earnings. No single filing or ratio establishes that a stock is a good buy.
1. Find the latest SEC filings
Search the company’s name or ticker in SEC EDGAR. The SEC describes Form 10-K as an annual report, Form 10-Q as a quarterly report, and Form 8-K as a current report for specified or material events. EDGAR is free to the public and lets investors review companies’ filings and operations. See the SEC’s Using EDGAR to Research Investments.
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- Open the newest 10-K and note its filing date and the fiscal year it covers.
- Open the newest 10-Q and check which subsequent quarter it covers.
- Review 8-K filings submitted since the latest 10-K or 10-Q for significant developments.
Checking both filing dates and reporting periods helps prevent an analysis from relying on information that has since been updated. This approach applies to U.S. reporting companies; non-U.S. issuers and companies with different reporting obligations may require different sources.
2. Understand the business before judging its results
Start with the 10-K’s Business section
Identify the company’s principal products or services, the markets it serves, and how it earns revenue. Note disclosed competition, important customer or supplier dependencies, regulation, and seasonal factors. These details provide context for interpreting growth: a change in revenue means more when you understand what the business sells and what could affect demand or operations.
Read the risks alongside the business description
Risk Factors can describe general, industry, geographic, or company-specific uncertainties. Look for disclosures that connect directly to the company’s business model rather than treating every listed risk as equally likely or consequential. The SEC’s How to Read a 10-K/10-Q explains where to find key information in these reports.
3. Read earnings in context
Compare consistent periods
Use the financial statements to examine revenue, expenses, operating results, and net income across comparable fiscal periods. Avoid treating one quarter or a headline earnings number as a complete picture of the business. Fiscal calendars and reporting periods can differ, so confirm what each figure covers before comparing it.
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Check management’s explanation against the statements
Read Management’s Discussion and Analysis (MD&A) for management’s account of what changed and why. Then compare that explanation with the income statement, balance sheet, and cash flow statement. The cash flow statement shows cash movements; the balance sheet provides a view of the company’s financial position. Read the accompanying notes for accounting context, and the auditor’s report for the auditor’s opinion and related information.
The SEC sets disclosure requirements and reviews filings, but that does not certify every statement in them. As SEC Investor.gov puts it: “The SEC does not vouch for the accuracy of a 10-K or 10-Q.” The filing is essential source material, not a guarantee of accuracy or investment performance.
4. Use P/E as one valuation lens
The price-to-earnings ratio (P/E) is a company’s share price divided by its earnings per share (EPS). In its glossary, the SEC describes EPS using earnings for the past 12 months divided by common shares outstanding. See Investor.gov’s P/E ratio definition.
When reviewing or comparing P/E figures, establish the earnings period and basis used. Companies may have different businesses, risks, or earnings patterns, so the ratio is a comparison tool—not a standalone measure of fair value. The SEC’s educational material does not set a universal fair-value multiple or numerical buy threshold. A low P/E alone does not prove a stock is cheap, and a high P/E alone does not prove it is overvalued.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.5. Assess the risks disclosed in the filings
Connect risk factors to the company’s finances
Review the 10-K’s Risk Factors, relevant MD&A discussion, and Item 7A market-risk disclosure where present. Market-risk disclosures can address exposure to interest rates, currencies, commodities, or equity prices. Consider how a stated exposure could affect the company’s business and financial statements; the presence of a risk disclosure does not by itself establish its likelihood or impact.
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If weighing two or more companies, use the same fiscal periods and definitions where possible. Compare their business models and markets, revenue and earnings trends, cash flows, balance sheets and financing context, disclosed uncertainties, and valuation measures such as P/E. No single metric is established as decisive; interpret differences in light of each company’s business and disclosures.
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6. Consider the stock in your portfolio
A company review cannot determine whether an individual stock suits your time horizon, tolerance for losses, or existing holdings. Stock prices can fall, and an investment in one stock can lose money. Investor.gov explains that diversification can reduce overall portfolio risk, but it does not remove risk or guarantee a return. See Diversify Your Investments.
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