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To research a U.S. public company before buying its stock, start with its latest SEC filings, compare its financial statements and risks over time, update your view with recent disclosures, and then ask whether the current share price and the investment fit your circumstances. SEC filings are free through EDGAR. This guide focuses on U.S. issuers; foreign companies and issuers using other reporting regimes may follow different forms and disclosure rules.
1. Find the company’s official filings
Search the SEC’s free EDGAR database by company name or ticker. An investor-relations website can make documents easier to find, but use the filed versions as your primary record. Check filing dates and amendments so you are working from the latest available information.
Research is part of due diligence, as the SEC’s Investor.gov guidance puts it. The goal is not to predict every outcome; it is to understand what the company reports, what could change its prospects, and what assumptions would have to hold for the stock to be attractive.
2. Start with the latest 10-K
A Form 10-K is the annual report filed with the SEC. It provides the broadest recurring view of the company’s business, audited annual financial statements, material risks, and management’s discussion and analysis (MD&A). Use the SEC’s 10-K/10-Q guide to orient yourself to its sections.
Understand how the business makes money
Before focusing on ratios, identify what the company sells, how it earns revenue, who its customers are, and which markets it serves. Note whether revenue depends on a few customers, products, regions, or suppliers, where the filing provides that information. Then read management’s account of what changed during the year and compare it with the results reported in the statements.
Read the risk and legal disclosures
Review Item 1A, Risk Factors; Legal Proceedings; market-risk disclosures; and the MD&A discussion of known trends and uncertainties. Distinguish risks common to the industry or economy from risks specific to this company. Look for relevant information about unresolved SEC staff comments, auditor changes, or disagreements with auditors when disclosed. Risk disclosures describe issues that could matter; they are not a complete forecast of what will happen.
3. Read the financial statements together and across time
Do not treat reported earnings as a stand-alone verdict. Read the income statement, balance sheet, cash-flow statement, statement of stockholders’ equity, and explanatory notes as connected evidence. Compare several reporting periods to see whether the business is changing and whether reported results translate into cash.
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- Revenue and costs: Examine the direction of revenue and major costs, and use the MD&A to understand management’s explanation for meaningful changes.
- Profitability: Consider whether margins and earnings are improving, weakening, or uneven, and whether the filing explains why.
- Cash generation: Compare earnings with cash from operations and capital spending. A favorable earnings figure alone does not establish durable cash generation.
- Liquidity and debt: Review available cash, near-term obligations, borrowing, and the company’s discussion of liquidity and capital resources. Consider whether debt creates refinancing or repayment pressure.
- Share count and equity: Check the equity statement and notes for share issuance, repurchases, and changes in outstanding shares. These can affect each existing share’s claim on the business.
- Accounting judgments: Read relevant notes and the MD&A discussion of critical accounting estimates. Accounting choices and estimates can affect how results appear.
The SEC’s guide to reading annual and quarterly reports highlights management’s discussion of liquidity, capital resources, trends, uncertainties, and critical accounting judgments as useful context.
4. Bring the annual report up to date
Read the latest 10-Q
A Form 10-Q provides unaudited quarterly financial statements, updates on material risks, and management discussion for the quarter. Compare it with the 10-K to identify what changed since year-end rather than assuming the annual report remains current indefinitely.
Check recent 8-K filings
A Form 8-K reports certain material events before the next scheduled annual or quarterly report. Review relevant 8-Ks filed after the 10-K or latest 10-Q for developments that could change your understanding of the company. EDGAR’s filing search provides access to these and other company disclosures.
5. Review governance, compensation, and ownership
Find the definitive proxy statement, often filed as Form DEF 14A, for information about matters shareholders will vote on, directors and executives, compensation, ownership, and applicable related-party disclosures. A 10-K may incorporate some proxy information by reference; follow its directions and check whether the proxy was filed after the annual report.
EDGAR also includes forms reporting insider transactions and beneficial ownership. Use these filings as context about reported transactions and ownership, not as a stand-alone signal that a stock should be bought or sold. The SEC’s EDGAR research guide describes where to find proxies and ownership disclosures.
6. Decide what the current price assumes
Company analysis and stock valuation are separate questions. A strong business can be overpriced, while a low-looking valuation measure can reflect serious risks or weak prospects. Ask what must go right for the current price to make sense, and make your assumptions explicit.
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Use measures that fit the business model, considering growth, profitability, cash flows, balance-sheet risk, and share count together. Compare the company with genuinely similar businesses or with its own history where that comparison is meaningful. Accounting differences and different business models can make apparent peer comparisons unreliable. A ratio by itself is not a buy-or-sell verdict, and SEC materials do not establish a universal fair-value cutoff or prescribe one valuation method for every company.
When weighing candidates, compare consistent fiscal periods and the same underlying factors: revenue sources, growth and profitability, cash generation and liquidity, debt and refinancing exposure, share dilution and repurchases, material risks, governance, ownership, and valuation assumptions. If you cannot explain why two businesses are comparable, do not treat their valuation measures as directly interchangeable. The SEC discusses metrics such as revenue, customers, and financial results in its IPO guidance; those examples do not create a universal valuation method.
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Check claims in presentations, news, newsletters, and social media against filed disclosures and independent evidence. The SEC warns investors not to make decisions solely on unsolicited emails, message-board posts, or company news releases. Lack of current, reliable financial information is a warning sign. See the SEC’s advice on avoiding investment fraud.
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8. Consider whether the investment fits you
Even a well-researched company may not be appropriate for every investor. Consider your time horizon, need for liquidity, ability to tolerate losses, existing holdings, and diversification before acting. Stock prices can move because of problems at a particular company or external events, and stocks are generally one part of an investor’s overall holdings. The SEC’s stock information explains these risks and distinguishes among ways investors may access stocks.
What to check for a newly public company
A newly public issuer may have a shorter public reporting history. Read the latest registration statement—typically Form S-1—and prospectus, including amendments, because disclosures can change during the IPO process. Pay attention to risk factors, use of proceeds, dividend policy, dilution, and offering terms. The SEC’s IPO bulletin, dated October 14, 2022, explains that declaring a registration statement effective is not SEC approval of the investment’s merits and does not guarantee that the disclosures are complete or accurate: Investor Bulletin: Investing in an IPO.
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