Where do I start when researching a stock?

Start with the business, not the numbers. Read the company's most recent 10-K on EDGAR or AssetRoom. Understand how the company makes money, who its customers are, and what could go wrong. Then look at the financial statements to see whether the business is performing as management describes.

What financial ratios should I look at when researching a stock?

Key ratios depend on the industry, but the most broadly useful include price-to-earnings (P/E) for valuation, gross and operating margins for profitability, debt-to-equity for leverage, and free cash flow yield for earnings quality. Compare ratios to industry peers rather than evaluating them in isolation. Sites like Stock Analysis and Koyfin provide these ratios pre-calculated from SEC filings.

How do I find a company's competitors?

The 10-K is the best starting point. Companies are required to describe their competitive landscape. They typically name their primary competitors or describe the competitive factors in their market. Once you've identified the peer group, you can pull up their 10-Ks and compare business models, margins, and risk factors directly.

How do I know if a stock is overvalued or undervalued?

Valuation requires comparing what you're paying to what you're getting. Common approaches include comparing the P/E ratio to historical averages and sector peers, running a discounted cash flow (DCF) model using figures from the 10-K, and comparing enterprise value to EBITDA. No single method is definitive. Use multiple approaches and accept that valuation involves judgment, not just calculation.

How to Research a Stock

There are many reasons to research a public company. You might be considering an investment. You might work in the same industry and want to understand what a competitor is doing. You might be evaluating a potential employer, supplier, or partner. Public companies are required to disclose a lot, and knowing how to find and interpret that information is useful in all of these situations.

Start with what the company does

Before looking at numbers, understand the business itself. What products or services does it sell? Who are its customers? How does it make money? What advantages does it have over competitors?

Apple Inc. (AAPL), for example, generates revenue from hardware (iPhone, Mac), services (App Store, iCloud), and wearables. Understanding this mix helps you evaluate where growth is coming from and what the company’s priorities are.

The Business section of a company’s 10-K filing is the best place to find this. It’s written in plain language compared to the rest of the document and gives you management’s own description of how the company operates.

Read the financial statements

Every public company files quarterly (10-Q) and annual (10-K) reports with the SEC. These contain the audited financial statements: income statement, balance sheet, and cash flow statement.

You don’t need to analyze every line item. Start with the big picture. Is revenue growing? Are profit margins stable or changing? Is the company generating cash from operations, or burning it? How much debt does it carry relative to its assets?

For a deeper look at navigating these documents, see how to read a 10-K filing.

Evaluate management

The people running a company matter as much as the business itself. Quality management can navigate challenges and allocate capital wisely. Poor management can squander advantages.

SEC filings include a Management’s Discussion and Analysis (MD&A) section where executives explain the company’s performance in their own words. Earnings calls let you hear how management responds to questions. Press releases show how they communicate wins and losses. Over time, you can see whether they deliver on what they say they’ll do.

Look for management that’s straightforward about challenges, not just cheerleading. Look for consistency between what they promise and what they deliver. Tesla, Inc. (TSLA), for example, has a management team known for ambitious targets. Tracking whether those targets are met tells you something about how to interpret future guidance.

Check who else owns it

Ownership structure tells you something about a company. How much stock do executives and board members own? Do they have real skin in the game, or is their compensation mostly salary? Insider ownership is disclosed through SEC Forms 3, 4, and 5.

Institutional ownership matters too. Mutual funds, pension funds, and hedge funds file 13F reports quarterly showing their holdings. High institutional ownership often means the company has been vetted by professional analysts. It also means the stock can move sharply if a large holder decides to sell.

You can find ownership data on most financial websites. Look for the breakdown between insiders, institutions, and retail investors.

Understand the competitive landscape

A company doesn’t exist in isolation. Who are its competitors? Is the industry growing or shrinking? Are there regulatory changes on the horizon that could affect the business?

If you’re researching a company for professional reasons, this context is often the most valuable part. Understanding how a competitor positions itself, where it’s investing, and what challenges it faces can inform your own strategy.

Compare to peers

Financial metrics mean more in context. A P/E ratio of 25 might be expensive in one industry and cheap in another. Compare the company’s valuation, growth rate, margins, and debt levels to similar businesses.

Common metrics to compare include price-to-earnings (P/E), price-to-sales (P/S), debt-to-equity, and return on equity. These give you a sense of how the market values the company relative to its fundamentals and how efficiently it operates.

Use primary sources

Press coverage and analyst reports can be useful, but they’re interpretations. The primary sources are SEC filings, earnings call transcripts, and company press releases. These tell you what actually happened, not what someone thinks it means.

SEC filings are the source of truth. They’re legally required, standardized, and carry consequences for misrepresentation. When in doubt, go to the filing.

Keep learning over time

Research isn’t a one-time event. Companies change. Management teams change. Industries evolve. The most valuable insights often come from following a company over multiple quarters and seeing how it responds to challenges.

Add companies you’re researching to a watchlist and set up alerts for new filings. AssetRoom provides AI-generated summaries of 10-K and 10-Q filings, so you can stay informed without reading every document cover to cover.