SEC FILINGS

How to Read a 10-K Without Wasting Time

The 10-K is the single most important document a public company produces. It is also 100 to 300 pages long. Here is how to focus on the 30 to 40 pages that actually matter.

The only filing where companies can't spin the numbers

Earnings releases are marketing documents. Analyst reports are second-hand. The glossy annual shareholder report is a brochure. The 10-K is the legal document — the one where the CEO and CFO personally certify, under the Sarbanes-Oxley Act, that the financial statements are accurate. It carries full independent audit requirements. Misstatements carry personal criminal liability.

As Investor.gov notes, the 10-K “offers a detailed picture of what the company does, and the risks it faces” — including audited financial statements, risk disclosures, management's own analysis of results, and footnotes that spell out every significant accounting judgment. No other public document comes close.

The problem is that most 10-Ks run 100 to 300 pages. Even experienced investors skim them or skip them entirely, relying on screeners and press releases that flatten, rearrange, or omit what the company actually disclosed. But a recent StockTitan analysis estimates that in a typical 150-page 10-K, only 30 to 40 pages carry the information that matters most for investment research.

The structure: four parts, but only four items matter

Every 10-K follows the same SEC-mandated structure: four parts containing up to 18 numbered items. Part I covers the business and its risks. Part II contains the financial data and management's discussion of it. Part III covers governance and executive compensation. Part IV lists exhibits and the full audited financial statements with notes.

You don't need all 18 items. Here are the four that carry the most signal per page:

01Item 7

MD&A

Management's Discussion and Analysis. This is where the company explains why the numbers look the way they do: revenue drivers, margin changes, capital allocation decisions, and known trends. Start here.

02Item 1A

Risk Factors

Companies list the most significant risks to the business, generally in order of importance. New risks, reworded risks, or risks that disappear without explanation are all signals.

03Item 8

Financials & Footnotes

The audited income statement, balance sheet, and cash flow statement — plus the footnotes, which often matter more than the face statements. Debt maturities, lease obligations, segment breakdowns, and contingent liabilities live here.

04Item 1

Business Description

What the company does, what it sells, and where it operates. Skim this for changes in product lines, geographic expansion, or new competitive dynamics. Most useful when you're new to the company.

The one-hour reading order

If you only have an hour, read in this order. This is roughly the approach described by professional analysts and aligns with what the SEC's own investor bulletin recommends.

1.
MD&A (20 min). Read for management's explanation of what drove revenue, margins, and cash flow. Note anything they emphasize — and anything they seem to avoid.
2.
Risk Factors (15 min). Pull up last year's 10-K in a second tab. Scan for new risks, reworded risks, and risks that vanished. When a company adds “customer concentration” or “ability to continue as a going concern” to its risk factors for the first time, that is a signal.
3.
Financial Statements & Footnotes (20 min). Start with the cash flow statement. If cash flow from operations is below net income, ask why. Then scan the footnotes for debt terms, lease commitments, revenue recognition policies, and contingent liabilities.
4.
Auditor's Report (2 min). Confirm an “unqualified opinion” (clean). Any qualification, emphasis-of-matter paragraph, or going concern language is a red flag that warrants immediate investigation.

What this looks like in practice: NVIDIA's hidden customer risk

If you followed NVIDIA through screeners alone in 2024, you saw an extraordinary story: $130.5 billion in revenue for fiscal year 2025, up from $60.9 billion the prior year. Four revenue segments. Record margins. A stock that tripled.

What the screener didn't show you was buried in the 10-K's customer concentration disclosures. In NVIDIA's fiscal 2024 annual filing, a single direct customer accounted for 19% of total revenue. UBS analyst Timothy Arcuri estimated this customer was Microsoft. By the first quarter of fiscal 2025, two direct customers alone represented 24% of revenue (13% and 11%), with two additional indirect customers each exceeding 10%.

The concentration has only grown. By Q3 of fiscal 2026, four direct customers each exceeded 10% of revenue, combining for 61% of NVIDIA's $57 billion quarterly revenue — up from 36% just one year earlier.

19%

of NVIDIA's FY2024 revenue from one direct customer

61%

of Q3 FY2026 revenue from just four direct customers

+25pp

increase in top-customer concentration in a single year

This is a material risk factor for any NVIDIA investor. If one or two hyperscalers slow their GPU purchases, the revenue impact is enormous. No screener surfaces this. No earnings press release headlines it. It's in the 10-K, in the notes to the financial statements, exactly where the SEC requires it to be.

What footnotes reveal: Apple's $53 billion commitment

Apple's fiscal 2024 10-K tells an instructive footnote story. The company reported $391 billion in revenue and $97 billion in net income. These are the numbers you see on any screener. But in the notes to the financial statements — specifically the commitments and contingencies section — Apple discloses $53 billion in manufacturing purchase obligations, with $52.9 billion due within 12 months.

That is a contractual commitment equal to roughly 14% of annual revenue. It represents components and assembly services Apple has already agreed to purchase from its supply chain. If iPhone demand were to drop sharply, these obligations don't disappear. This is the kind of detail that matters for understanding a company's true risk profile — and it lives exclusively in the 10-K footnotes.

The same section discloses $15.6 billion in fixed lease payment obligations across Apple's global retail and corporate footprint. Combined with the manufacturing commitments, that's nearly $70 billion in contractual obligations you wouldn't find on any screener or in any earnings call summary.

The year-over-year trick

One of the most efficient ways to read a 10-K is to not read it in isolation. Open last year's filing side by side and scan for what changed.

The SEC's own guidance on MD&A states that the discussion “should change over time to maintain an appropriate focus on material factors.” When language stays identical year after year, it often means the section is boilerplate. When language changes, something real happened.

Specifically, look for:

•New risk factors — A company adding “customer concentration” or “regulatory uncertainty” for the first time is telling you something it didn't need to say before.
•Reworded risks — A risk factor that shifts from “we may face” to “we have experienced” has changed from hypothetical to realized.
•Disappearing risks — A risk that was material last year vanishing without explanation may mean management is minimizing rather than resolving.
•Accounting policy changes — A shift in revenue recognition or depreciation method changes the meaning of every number that follows.

The filing is the source. Everything else is a summary.

Screeners, analyst notes, and earnings recaps all derive from the 10-K. They are convenient, but they are summaries — and summaries lose information. Customer concentration disclosures get dropped. Footnote commitments get collapsed. Risk factor changes go unmentioned.

DeepFundamental parses SEC filings directly and preserves the company's own reporting structure. Instead of forcing every company into a universal template, we show you the line items, segment breakdowns, and disclosures exactly as the company filed them — so you can see the same level of detail that the 10-K provides, without manually reading 200 pages.

See the 10-K data without reading 200 pages

NVIDIA's segment breakdowns, Apple's commitment footnotes, every line item the company actually filed — parsed directly from the SEC filing.

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