What Are 10-K and 10-Q?
US-listed companies file regular reports with the Securities and Exchange Commission (SEC). These are public documents, free to read on the SEC's EDGAR database or summarized on sites like Yahoo Finance.
- 10-K — Annual report. Detailed financials and business description for the full year.
- 10-Q — Quarterly report. Updated every three months with interim financials.
Most investing apps show you summary numbers. Reading the actual filings at least once helps you spot accounting tricks and understand what “adjusted earnings” means — because the adjustments often tell a different story.
Three Statements — One Analogy Each
Income Statement
Report card for a period. Revenue minus costs equals how much profit is left.
Balance Sheet
Snapshot of strength on a single date. Assets = Liabilities + Equity (always).
Cash Flow Statement
Bank account record. Even a profitable company can run out of cash.
Income Statement — How Much Did They Earn?
Reading from top to bottom: Revenue → Cost of Goods Sold → Gross Profit → Operating Expenses → Operating Income → Interest & Taxes → Net Income → EPS (Earnings Per Share).
Numeric example (hypothetical small company)
Revenue $100M − COGS $60M = Gross Profit $40M
− SG&A $25M = Operating Income $15M
− Interest & Tax $5M = Net Income $10M
With 100M shares outstanding: EPS = $10M ÷ 100M = $0.10. This EPS is the denominator in the P/E ratio.
- Revenue YoY growth — is the business expanding?
- Operating margin — what percentage of revenue becomes operating profit? Shrinking margins signal pricing pressure or rising costs.
- One-time items — strip them out to see the underlying trend. A building sale inflates one quarter's profit but means nothing for the next.
Balance Sheet — Financial Strength and Debt
The accounting identity Assets = Liabilities + Equity must always hold. Assets include cash, receivables, inventory, property, and intangibles. Liabilities include short-term debt, long-term bonds, and accounts payable. Equity is what remains for shareholders.
What beginners should check: Is there enough cash and short-term investments to cover near-term obligations? Has total debt grown suddenly? Is the debt-to-equity ratio reasonable compared to industry peers?
Banks and insurance companies carry structurally high leverage — that is their business model. Applying manufacturing benchmarks to them leads to wrong conclusions. Always contextualize with sector norms.
Cash Flow Statement — The Most Important Number
Accounting profit and actual cash are not the same. If a company sells on credit, revenue and profit are recognized immediately, but cash only arrives later. The cash flow statement reveals this gap.
- Operating Cash Flow (OCF) — Cash generated from core business operations.
- Investing Activities — Capital expenditures (CapEx) for equipment/facilities, or proceeds from asset sales.
- Financing Activities — Debt repayment, dividends, share buybacks, or new equity issuance.
Free Cash Flow (FCF) ≈ OCF − CapEx. This is the “leftover cash after maintaining and growing the business” — the fuel for dividends, buybacks, and debt repayment. See the dividend guide.
Red flag example
If net income is consistently positive but OCF is consistently negative, receivables or inventory may be ballooning — or accounting and cash reality are diverging. Buying on reported profit alone is one of the oldest investing traps.
Connection to Earnings Season
The numbers released each quarter are the core of earnings season. When actual results diverge from analyst consensus or when management's guidance surprises, stocks can move 10–20% in a day. Understanding which line in the financials drove the surprise is what separates informed investors from headline-chasers.
Common Mistakes
Getting excited by revenue alone
Large revenue growth with widening losses and negative OCF is a danger sign. Always check margins and cash flow.
Judging from a single quarter
Seasonality and one-time items distort single quarters. Look at 4–8 quarter trends.
Comparing margins across industries
Software companies naturally have 70%+ gross margins; grocery retailers operate on 3–5%. Cross-sector comparisons are misleading.
Ignoring the financials and watching only charts
Charts are a secondary tool. The fundamentals determine the long-term direction.
Beginner Practice Steps
- Pick one stock you own or follow and pull up its most recent 10-K or 10-Q.
- Write down annual revenue, operating income, net income, and EPS for the last two years.
- Check cash, total debt, OCF, and FCF — just one line each.
- Verify whether the EPS used in P/E ratio calculations includes one-time items.
- Write one sentence answering “why am I considering buying this?” in the buy checklist.
Advertisement