10-K vs 10-Q: what each filing tells you (and which to read first)

The short answer: a Form 10-K is the audited annual report a US public company files with the SEC — the fullest single document it publishes about its business, risks and finances. A Form 10-Q is the unaudited quarterly update, filed after each of the first three fiscal quarters. One 10-K plus three 10-Qs make up a company's periodic-reporting year. If you only ever read one, read the 10-K; if you follow a company through the year, the 10-Qs are how you watch the annual story develop — or quietly change.

Both documents are free, primary-source material, filed under the Securities Exchange Act of 1934 (annual reports under Rule 13a-1, quarterlies under Rule 13a-13) and available on the SEC's EDGAR system. Everything below is about reading them efficiently.

The mechanics: cadence, deadlines, audit status

A 10-K arrives once per fiscal year. How quickly after year-end depends on the company's SEC filer category: 60 days for large accelerated filers (public float of $700 million or more), 75 days for accelerated filers, 90 days for everyone else — deadlines set by the SEC in Final Rule 33-8644. The 10-Q follows each of the first three quarters within 40 days (large accelerated and accelerated filers) or 45 days (non-accelerated). There is deliberately no fourth-quarter 10-Q: the annual report absorbs it, which is why Q4 figures have to be derived by subtracting the nine-month totals from the full-year numbers.

The audit distinction matters more than most beginners assume. The financial statements in a 10-K are audited — an independent accounting firm has tested them and signed an opinion, which since 2019 also discusses the “critical audit matters” that gave the auditor the most difficulty. The statements in a 10-Q are unaudited: the auditor performs a far narrower interim review (required by Regulation S-X, Rule 10-01(d)) but issues no opinion. Quarterly numbers are usually reliable — but the annual figures are the ones that carry an auditor's signature, and restatements are announced against them. The SEC's own investor bulletin, How to Read a 10-K/10-Q, is the canonical primer on both forms; the investor.gov glossary states the three-quarters cadence and the unaudited status in one sentence.

What only the 10-K has

Three sections exist in full only in the annual filing, and they are where most of the reading value concentrates:

• Item 1 — Business. The company's own structured description of what it does: segments, products, customers, competition, regulation, seasonality. For an unfamiliar company this is the fastest reliable orientation that exists, because it is a legal document rather than a marketing page.
• Item 1A — Risk Factors. The complete inventory of what management believes could materially hurt the business, generally ordered by importance per the SEC's bulletin. Much of it is boilerplate that appears in every filing in the industry — the craft is reading it against last year's version and against competitors' lists. New risks, reworded risks and risks that moved up the order are the signal; the rest is the noise floor.
• Item 8 — Financial statements and footnotes. The audited statements plus the notes: revenue-recognition policy, segment detail, leases, debt covenants, commitments and contingencies, related-party dealings. Experienced filing readers usually go footnotes-first — it is the part of the document where accounting choices and off-balance-sheet reality live, and the 10-Q's condensed notes are no substitute.

Beyond the big three, two quieter items reward a two-minute scan. Item 9A — Controls and Procedures is where a company must disclose a material weakness in its internal control over financial reporting; that phrase appearing for the first time is one of the most reliable early indicators that the reported numbers deserve extra scrutiny. Item 3 — Legal Proceedings lists the litigation management considers material, with the fuller picture in the commitments-and-contingencies footnote. And a structural quirk worth knowing: Items 10 through 14 — directors, executive compensation, ownership — are usually not written out in the 10-K at all but incorporated by reference from the proxy statement (DEF 14A), a separate filing. Anyone hunting for compensation detail in the annual report itself is looking in the wrong document.

The 10-K's Item 7, Management's Discussion & Analysis, also exists in the 10-Q — but the annual version is the deep one. The SEC describes MD&A as management's own narrative of the year; read it asking three questions. Why did revenue and margins move the way they did? What does management say about liquidity — cash generated, cash needed, debt coming due? And what does the filing flag about the period ahead: known trends, commitments, uncertainties? A year-over-year comparison of MD&A language is one of the cheapest research techniques available — companies rarely delete an optimistic sentence without a reason.

What the 10-Q is for

The 10-Q is not a small 10-K; it is a different instrument. Its Part I carries the condensed interim statements and a quarter-focused MD&A; its Part II carries the updates: legal proceedings, material changes to the risk factors, unregistered securities transactions. Three uses justify the twenty minutes a 10-Q takes:

• Trend confirmation. The annual statements aggregate; the quarterlies sequence. Whether margins are stabilising or eroding, whether inventory is building faster than revenue, whether receivables are stretching — quarterly statements answer questions that annual totals blur.
• Change detection. Part II, Item 1A only lists what is new or different about the risk factors. A quarter with real entries there is a quarter worth reading closely — the company is telling you, in its most lawyer-checked voice, what changed.
• Early context for the next annual. Guidance-adjacent language, new segments, fresh litigation and accounting changes usually surface in a 10-Q months before they are fully narrated in the 10-K.

One boundary note: this cadence is a US-listed-company convention. Foreign private issuers file an annual Form 20-F instead and furnish interim information on Form 6-K — so for a European company with a US listing, the “10-K vs 10-Q” question becomes “20-F plus whatever the home market requires”.

Finding both on EDGAR, free

No paid terminal is involved at any point. The SEC's search-filings page finds a company by name or ticker and lists every filing newest-first — filter the form type to “10-K” or “10-Q” and open the primary document. The EDGAR full-text search goes further: it searches inside filings since 2001, so you can look up every filing that mentions a supplier, a drug name or an accounting term. Two practical habits: use the “R” (reader) version of the document EDGAR renders for comfortable navigation, and archive the filing date with every number you extract — filings are amended (10-K/A, 10-Q/A), and an amended figure without its date is a trap.

From reading filings to structured research

A worked micro-example of what diff-reading looks like in practice. Year one, a company's Item 1A contains the standard paragraph on supply-chain dependence. Year two, the same paragraph names a specific region, adds a sentence on single-source components, and moves eleven positions up the list. Nothing has been announced; no press release exists. But the company's most cautious document just re-ranked its own worries — and the quarter's 10-Q shows inventory growing twice as fast as revenue. Neither observation is a conclusion on its own. Together they are a precise, dated research question, produced by nothing more than reading two free documents against their prior versions.

Filings are the raw material of fundamental research — the place where revenue recognition, segment economics and risk language actually live. The limiting factor is rarely access; it is workload. Reading one 10-K properly takes an evening. Reading twelve per year, plus the quarterlies, is where systematic tooling earns its place: structured extraction of the same fields from every filing, so that the human reading time goes to the parts that changed. That division of labour — software for the repetitive scan, the reader for judgement — is the model Acutic's research methodology is built on, and the features page shows what the structured layer looks like in practice. For the verification habit — deciding how much weight any summarised research deserves before relying on it — see our checklist on trusting AI stock analysis.

The reading order, condensed: for a company new to you, the latest 10-K in priority order — Item 1, Item 1A, Item 7, then the footnotes. From then on, each 10-Q's MD&A and Part II updates, with the annual re-read once a year. It is less reading than it sounds, and after two cycles the diffs — not the documents — become the thing you actually read.

Further reading: a field guide to AI stock scores — how filing-derived fundamentals end up inside scoring systems — and can you trust AI stock analysis? — a verifiability checklist for any tool that reads filings for you. Create free account.

Acutic provides investment research and educational analysis under MAR Art. 20 / § 85 WpHG. Acutic does not provide investment advice (Anlageberatung per § 1 Abs. 1a S. 2 Nr. 1a KWG / Art. 4(1)(4) MiFID II), portfolio management, or any other licensed investment service. No content in this article constitutes a personal recommendation.