Financial Due Diligence: How to Read the Numbers

Financial due diligence has a reputation for being the domain of accountants, and the deep version is. But the first pass — the one that tells you whether a company is growing, stalling, or quietly falling apart — is something anyone can do with public filings and a bit of skepticism. For U.S. public companies, the numbers are audited and sitting right there in EDGAR.

The trend beats the snapshot

A single year's revenue tells you almost nothing. Pull three to five years and look at the shape: is revenue compounding, flat, or sliding? Are margins expanding or getting squeezed? A company growing revenue while margins collapse is buying growth it can't afford. The 10-K (annual) and 10-Q (quarterly) give you the income statement, balance sheet and cash-flow statement you need to see the trajectory.

Cash is the truth serum

Profit is an opinion; cash is a fact. Net income can be shaped by accounting choices, but the statement of cash flows is harder to dress up. Look at cash from operations — is the business actually generating cash, or is reported profit not converting into money in the bank? A persistent gap between net income and operating cash flow is worth understanding before anything else.

Per-share numbers and what they hide

Earnings per share is the figure that gets quoted, but it moves for reasons that have nothing to do with the business. A rising EPS can come from genuine profit growth or simply from a company buying back its own shares and shrinking the denominator. Check whether the share count is drifting up (dilution from stock compensation) or down (buybacks) before you read too much into the per-share trend.

It also helps to separate the recurring from the one-off. A year that looks great because of a one-time asset sale, or terrible because of a single writedown, isn't the run-rate. Companies report both basic and diluted EPS and often a "continuing operations" line — those distinctions exist precisely so you don't mistake a blip for the trend.

Read the balance sheet for landmines

Assets and equity are the headline, but the interesting parts are the obligations: total debt, when it matures, and how much cash there is to service it. A company with a wall of debt coming due in eighteen months is in a very different position than the revenue line alone suggests. Note the leverage, the maturity schedule, and any off-balance-sheet commitments flagged in the notes.

The words matter as much as the numbers

The Management's Discussion & Analysis and the Risk Factors sections of a 10-K are where management explains — because it's legally required to — what could go wrong and why the numbers moved. Read them. Material weaknesses in internal controls, going-concern language, a change of auditor, or a restatement are all signals that deserve a hard look before you rely on the financials.

Quality of earnings, at a high level

"Quality of earnings" is the accountant's term for how real and repeatable a company's reported profit is, and you can form a rough view of it without a formal engagement. The core question is whether earnings are backed by cash and by ordinary operations, or propped up by one-time gains, aggressive revenue timing, or accounting estimates that flatter the result.

A few high-level tells: operating cash flow that consistently lags net income, receivables or inventory growing much faster than revenue, or a heavy reliance on "adjusted" non-GAAP figures that strip out costs which keep recurring. None of these is proof of a problem on its own, but together they tell you where a real quality-of-earnings analysis should dig.

Public versus private: what you can actually get

The gap between diligencing a public and a private company is mostly a gap in what's available. A U.S. public company gives you years of audited statements, standardized formats, and an independent auditor's opinion, all free in EDGAR. You can build a multi-year picture before you ever speak to management.

Private companies owe you nothing until they choose to share, and what they share is often unaudited management accounts. That doesn't make the numbers wrong, but it shifts the burden onto you to test them — reconciling to bank statements and tax returns, and confirming the figures against the company's licenses and contracts. The public-company skills still apply; you just have to earn the data first.

Know the limits of the first pass

Public filings are audited and reliable, but they're a rear-view mirror, and they only cover public companies. Private-company financials require the company to hand them over, and then you're trusting unaudited numbers until you verify. Use the public record to form a sharp first view and to know exactly which questions to ask next — and remember that reading filings is not the same as a formal audit, and none of this is investment advice.