How to Read SEC Filings: 10-K and 10-Q for Investors

Written by Jim Norris · NorrisAI AlphaLens · Updated August 2026

Quick answer: SEC filings — particularly the annual 10-K and quarterly 10-Q — contain more complete, legally required disclosures than any press release or earnings call. Companies have legal obligation to disclose material risks and facts in these filings, which makes them more candid than marketing-oriented communications. The key is knowing where to look — most of the valuable information isn't in the headline numbers.

Where to find SEC filings

All SEC filings are freely available on EDGAR (Electronic Data Gathering, Analysis, and Retrieval) at sec.gov. Search by company name or ticker to find all filings. Most financial data platforms also link directly to filings from stock pages.

The 10-K — annual report

The 10-K is filed once per year, typically 60–90 days after fiscal year end. It's the most comprehensive document a public company produces. Key sections:

Business (Item 1)

Management's description of what the company does, its products and services, competitive landscape, and key customers. Read this for a company you don't know well — it's the official plain-English explanation of the business model.

Risk Factors (Item 1A)

This is where the real disclosure happens. Companies are required to disclose material risks to their business. Compare this section year-over-year — new risks appearing, existing risks being upgraded, or language becoming more cautious are all meaningful signals. Pay particular attention to risks that seem specific and operational rather than boilerplate legal language.

Management's Discussion & Analysis — MD&A (Item 7)

Management's own explanation of the financial results — why revenue grew or fell, what drove margin changes, how they're thinking about the business going forward. This is often the most informative section for understanding the business narrative behind the numbers. Compare what management emphasizes to what they downplay.

Financial Statements and Footnotes (Items 8)

The full income statement, balance sheet, cash flow statement, and — critically — the footnotes. The footnotes disclose accounting policies, revenue recognition methods, off-balance-sheet obligations, related-party transactions, and dozens of other details that the headline statements don't show. Professional investors read the footnotes.

Warren Buffett has said he reads annual reports wanting to know what he would want to know if he owned the entire company — not just the highlights management chooses to feature, but the full picture including risks, accounting choices, and competitive dynamics. The 10-K is where that full picture lives.

The 10-Q — quarterly report

Filed within 40–45 days of each quarter end (three times per year — the fourth quarter is covered by the 10-K). Less comprehensive than the 10-K but still contains full financial statements, updated MD&A, and any material developments since the last annual filing. Particularly useful for tracking whether trends identified in the 10-K are improving or deteriorating.

What to look for that most investors miss

Changes in accounting policies. When a company changes how it recognizes revenue or records expenses, buried in the footnotes, it often signals pressure to manage reported numbers.

Related party transactions. Business dealings between the company and its executives or major shareholders deserve scrutiny — they may or may not be on arm's-length terms.

Off-balance-sheet obligations. Leases, guarantees, and contingent liabilities that don't appear as debt on the balance sheet can still represent real financial obligations.

Year-over-year language changes in Risk Factors. A new risk that didn't appear last year is worth understanding. An existing risk with escalating language is worth investigating.

Professor Aswath Damodaran of NYU Stern Business School emphasizes that the most valuable information in SEC filings is rarely in the headline numbers — it's in the footnotes and the MD&A where management's choices about accounting and disclosure reveal how they think about the business and their shareholders. — Narrative and Numbers, Columbia Business School Press

How AlphaLens uses SEC filings

AlphaLens pulls live SEC EDGAR data for every analysis — the Full Company Breakdown, Earnings Quality Analyzer, and Management Quality Scorecard all incorporate filing data. The SEC Filing Highlights framework (framework #13) specifically extracts the critical language from recent 10-Ks and 10-Qs that press releases and earnings calls often leave out.

Where to go deeper

For a detailed walkthrough of each research framework, see the complete guide to all 15 AlphaLens frameworks.

For definitions of investing terms, see the AlphaLens investing glossary.