How to Read a 10-K Filing
A 10-K is the most important document a public company files. Learn which sections matter, how to find key financial data, and how analysts use 10-K filings for equity research.
What is a 10-K?
A 10-K is the annual report every U.S. public company must file with the SEC within 60–90 days of fiscal year end (40 days for large accelerated filers). It is more detailed than the glossy annual report sent to shareholders and is written primarily for regulatory disclosure. Analysts treat the 10-K as the primary source of truth for financial position, risk profile, and strategic direction.
The four-part structure of a 10-K
A standard 10-K is divided into four numbered Parts. Part I covers the business (Item 1), risk factors (Item 1A), and properties. Part II contains the financial data including audited statements (Item 8) and management's discussion (Item 7). Part III covers governance and compensation. Part IV contains supplemental exhibits and certifications. Most analysts focus on Items 1, 1A, 7, and 8.
Item 1 — Business description
Item 1 describes what the company does: its products, customers, competitive landscape, distribution channels, seasonality, and regulatory environment. It is typically the clearest plain-English explanation of the business model. Read it to understand how revenue is generated and what structural advantages management claims. Compare year-over-year to identify strategic shifts.
Item 1A — Risk factors
Item 1A is management's own list of everything that could go wrong. While risk factors are written by lawyers and can be broad, they must be specific to the company — the SEC increasingly challenges generic boilerplate. Analysts read risk factors for tail risks, competitive threats, regulatory exposure, and concentration risks. New risk factors added year-over-year are particularly worth noting.
Item 7 — MD&A: Management Discussion & Analysis
The MD&A is where management explains in narrative form what drove the financial results — revenue growth drivers, margin changes, working capital movements, and capex priorities. It bridges the gap between the numbers and the story. A well-written MD&A calls out the factors behind each significant line item change. Vague MD&As that omit specifics are a yellow flag. The MD&A also includes a liquidity section discussing cash flow, debt covenants, and near-term financing needs.
Item 8 — Financial statements and notes
Item 8 contains the audited financial statements: income statement, balance sheet, statement of cash flows, and statement of equity. These are accompanied by the audit opinion and the notes to financial statements. The notes are among the most valuable and most overlooked parts of any 10-K. They contain revenue recognition policies, segment breakdowns, lease obligations, related-party transactions, contingent liabilities, and stock compensation details.
How to compare 10-Ks year over year
Year-over-year comparison is where the 10-K becomes a competitive intelligence tool. Track changes in segment reporting structure, new or removed risk factors, shifts in revenue recognition policy, changes in geographic mix or customer concentration, and changes to the audit firm. Management commentary that becomes more guarded or less specific than prior years can also signal emerging issues.
Common red flags in a 10-K
Watch for: going-concern language in the audit opinion; large increases in days sales outstanding without explanation; revenue growing faster than cash from operations over multiple periods; aggressive goodwill relative to tangible equity; frequent restatements or material weakness disclosures in internal controls (Item 9A); and sudden changes in accounting estimates that improve reported earnings. Each warrants deeper investigation.
On Briefed
Briefed surfaces the most recent 10-K for any U.S.-listed ticker, with Items 1, 1A, and 7 extracted and highlighted for quick review. The AI Analyst can answer specific questions directly from the filing text — useful for pulling exact revenue breakdowns, risk factor language, or MD&A commentary without reading the full document.