How to Research a Stock Using SEC Filings

Professional investors have the same source documents you do. Every SEC filing that hedge funds and institutional analysts read is available free on EDGAR. The difference is knowing what to look for.

This guide walks through one approach to researching a public company using SEC filings. It’s a starting point, not a rulebook. Every investor develops their own process over time, and there’s no single right way to do this. Some people start with the financials, others with the risk factors, others with the proxy statement. What matters is that you’re getting your information from the filings themselves, whether you read them in full or use summaries to identify what deserves a closer look.

Why SEC filings beat financial news

Financial news aggregates and summarizes what companies have already disclosed. SEC filings are the primary source. Reading the actual filings gives you:

• Complete information with no editorial filtering or word count limits
• A standardized structure where every company follows the same form, so you can compare directly
• Legal accountability, since executives certify the accuracy of SEC filings under Sarbanes-Oxley (a 2002 law requiring executives to personally certify financial accuracy), and materially false statements are a federal crime
• Forward-looking detail, including guidance, risk factors, and strategic priorities in management’s own words

Step 1: Start with the 10-K to understand the business

The 10-K is the annual report. Filed once a year (within 60-90 days of fiscal year end), it’s the most comprehensive disclosure a company makes. Read it in this order:

Item 1: Business description

This section explains what the company does, how it makes money, and who its customers are. For unfamiliar companies, start here.

Look for how the company makes money (subscription, transaction fees, product sales, licensing), whether any single customer represents more than 10% of revenue (usually disclosed), how much revenue comes from outside the US, and what management says distinguishes them from competitors.

Item 1A: Risk factors

This is the most underrated section. Risk factors are legally required to be material - companies can’t just list generic “competition is intense” boilerplate without specifics. Reading risk factors gives you:

• Industry-specific risks the company is watching
• Customer concentration, regulatory exposure, and technology risks
• Currency, interest rate, and macroeconomic sensitivities

Compare risk factors year-over-year. New risks added are often early signals of problems management is starting to worry about. Risks removed may indicate prior concerns have been addressed.

Item 7: Management’s Discussion & Analysis (MD&A)

The MD&A is management’s narrative explanation of the financial results. It’s the closest thing to a frank conversation with management you can get from a filing.

Read for:

• What drove revenue growth (organic vs. acquisitions, volume vs. price)
• Why margins changed (explained in their own words)
• Capital allocation decisions (R&D investment, acquisitions, buybacks)
• Liquidity and capital resources (can they fund operations and growth?)

Financial Statements

The income statement, balance sheet, and cash flow statement. Rather than reading every line, focus on the income statement (revenue growth rate, gross margin, operating margin), the balance sheet (cash, debt, and whether receivables are growing faster than revenue), and the cash flow statement (operating cash flow compared to net income, capex levels, and free cash flow).

Notes to the financial statements contain important detail on accounting policies, segment breakdowns, and off-balance-sheet items (obligations that don’t appear on the main balance sheet but still affect the company).

Step 2: Check recent 10-Qs for the latest trends

The 10-Q is the quarterly update. Filed within 40-45 days of each quarter end, it shows whether the trends you identified in the 10-K are continuing, accelerating, or reversing.

After reading the 10-K, reading the most recent 10-Q takes much less time because you already know the business. Focus on:

• Is revenue growth accelerating or decelerating?
• Is gross margin expanding or compressing vs. the same quarter last year?
• What new language did management add or remove in the MD&A?
• Did the cash position change materially? Any new debt?

Three consecutive quarters of worsening margins or slowing growth is a trend worth taking seriously, even if each individual quarter looks “not that bad.”

Step 3: Monitor 8-Ks for real-time events

The 8-K is filed within 4 business days of a material event. Key 8-K triggers include:

• Item 2.02: Quarterly earnings results and press releases
• Item 5.02: Executive leadership changes (CEO, CFO, board members)
• Item 1.01 / 1.02: Entering or terminating a material agreement
• Item 8.01: Other material events (strategic announcements, product recalls, etc.)

For companies you own or are watching, 8-K alerts are essential. A CEO departure or material contract termination is information you want immediately, not three months later in the next 10-Q. EDGAR offers free RSS feeds for any company’s filings, and AssetRoom covers 10-K and 10-Q filings with AI-powered summaries.

Step 4: Check the proxy statement (DEF 14A) for governance signals

The proxy statement covers executive compensation, board composition, and shareholder votes. Key things to check:

Check whether executive compensation is tied to metrics that align with shareholder value. Watch for pay plans based on non-GAAP metrics (adjusted numbers that exclude certain costs, sometimes making performance look better) that exclude real costs. Look at insider ownership - do executives own meaningful amounts of stock? Skin in the game is a positive signal. Review related-party transactions for unusual arrangements or deals that aren’t conducted at fair market terms. And check whether independent directors are actually independent, or whether they have financial ties to the company.

Step 5: Track Form 4 filings for insider activity

Form 4 reports transactions by insiders (executives, directors, 10%+ shareholders) within 2 business days.

Insider buying is a meaningful positive signal - insiders who know the business best are buying with their own money. Insider selling is less informative (insiders sell for many reasons: diversification, taxes, divorce), but a cluster of selling by multiple insiders can be worth monitoring.

EDGAR’s full-text search lets you look up Form 4 activity for companies you follow. Aggregators like OpenInsider also make it easy to screen for notable insider transactions.

Step 6: Compare with competitors using the same framework

Once you’ve built a picture of one company from filings, apply the same framework to competitors. Since every company files in the same format, you can directly compare:

• Gross margins across the sector
• Revenue growth rates
• R&D spend as a percentage of revenue
• Balance sheet strength (cash, debt, working capital)

Identifying why Company A has a 10 percentage-point gross margin advantage over Company B - and whether that advantage is durable - is the core of fundamental analysis.

Step 7: Synthesize into an investment thesis

An investment thesis is your own view of why a company is worth owning (or avoiding) and what would change your mind. The filings give you the raw material, but the thesis is yours to build.

There’s no template for this. Some investors write a single paragraph. Others maintain a detailed document they update quarterly. The important thing is that you can articulate what you believe about the business and why. Questions like “how does this company make money?”, “is the growth sustainable?”, “what are the biggest risks?”, and “what would have to change for this to be a bad investment?” are useful starting points, but your thesis should reflect what you personally care about most.

Once you have a thesis, earnings become a quarterly checkpoint. Each new 10-Q or 10-K is a chance to ask: is the evidence confirming or contradicting what I believe about this business?

Tools for SEC filing research

SEC EDGAR (edgar.gov) gives you complete free access to all filings. AssetRoom provides AI-powered summaries with email alerts for companies you follow. EDGAR’s full-text search lets you search across all filings for specific terms. And the SEC EDGAR XBRL viewer allows you to compare financial data across companies and years.