TL;DR. U.S.-listed companies must file three core periodic reports with the Securities and Exchange Commission. The 10-K is the audited annual report, the 10-Q is the unaudited quarterly update for the first three quarters of a fiscal year, and the 8-K is the “current report” filed within roughly four business days when a material event happens. Together they form the public record an investor can lean on instead of headlines.
The three forms at a glance
Before walking through each form individually, it helps to see them side by side. The SEC sets different filing deadlines depending on the company’s size (more on that below).
| Form | What it is | Frequency | Audited? | Deadline |
|---|---|---|---|---|
| 10-K | Comprehensive annual report | Once per fiscal year | Yes — audited financials | 60 / 75 / 90 days after fiscal year-end |
| 10-Q | Quarterly update on operations and finances | First three fiscal quarters (no Q4 10-Q) | No — unaudited, reviewed by auditor | 40 / 45 days after quarter-end |
| 8-K | “Current report” for material corporate events | As-needed (event-driven) | No | Generally four business days |
Form 10-K: the comprehensive annual report
The 10-K is the single most important document any U.S.-listed company publishes each year. The SEC describes it as providing “a comprehensive overview of the company’s business and financial condition” and notes that it includes audited financial statements, which is what sets it apart from glossier shareholder mailings and investor decks. The annual report to shareholders a company sends ahead of its annual meeting is a separate, less rigorous document — the 10-K is the legally binding filing.
A 10-K is organized into four parts. Without memorizing item numbers, here is what each part is for:
- Part I — Business and risk. Item 1 (Business) describes what the company actually does, its segments, customers, suppliers, and competition. Item 1A (Risk Factors) is the candid catalogue of things that could break the business — read this first if you are new to a stock. Item 2 (Properties) lists key facilities. Item 3 (Legal Proceedings) flags material litigation.
- Part II — Financials and MD&A. Item 7 (Management’s Discussion & Analysis) is where management explains the year’s results in plain English. Item 8 (Financial Statements and Supplementary Data) holds the audited income statement, balance sheet, cash-flow statement, and the footnotes — which is where the real information lives. Item 9A covers internal controls.
- Part III — Governance and compensation. Director and officer information, executive pay, and related-party transactions. Many filers incorporate this section by reference from the proxy statement.
- Part IV — Exhibits. Material contracts, the list of subsidiaries, certifications by the CEO and CFO, and the auditor’s consent.
Pro tip: the footnotes to the financial statements (in Item 8) are usually the highest information density in the entire document. Revenue recognition policy, segment detail, stock-based compensation, leases, commitments, and post-balance-sheet events all live there.
10-K filing deadlines depend on company size
Three categories matter. They are defined by the company’s public float (the market value of shares held by non-affiliates), measured as of the last business day of its most recent second fiscal quarter. The Code of Federal Regulations spells out both the categories (17 CFR § 240.12b-2) and the resulting 10-K deadlines (17 CFR § 249.310):
So Apple, with a public float in the trillions, files its 10-K within 60 days of fiscal year-end. A microcap with under $75 million of public float gets a full 90 days. The deadlines for transition reports (when a company changes its fiscal year) follow Rule 13a-10.
Form 10-Q: the quarterly check-in
The 10-Q is the in-season update between annual reports. The SEC describes Form 10-Q as containing “unaudited financial statements” that “provide a continuing view of the company’s financial position during the year.” Importantly, Form 10-Q is required for the first three fiscal quarters only — the fourth quarter is captured inside the 10-K, so you will never find a Q4 10-Q. That is a frequent point of confusion for new investors.
A 10-Q is shorter and lighter than a 10-K, but the structure echoes its bigger sibling:
- Part I — Financial information. Quarter-to-date and year-to-date income statement, balance sheet, cash-flow statement (all unaudited), condensed footnotes, MD&A, market risk disclosures, and a statement on disclosure controls.
- Part II — Other information. Updated legal proceedings, updated risk factors (typically only changes from the most recent 10-K), unregistered sales of equity, share repurchases, defaults, mine-safety disclosures, and exhibits including the Sarbanes-Oxley CEO/CFO certifications.
“Unaudited” does not mean unreviewed. Auditors perform a review (a lower level of assurance than a full audit), and the CEO and CFO sign the same Sarbanes-Oxley Section 302 and 906 certifications they sign on the 10-K. Numbers can still be restated — just less often than the rumor mill suggests.
Deadlines, also from 17 CFR § 249.308a, are 40 days after quarter-end for large accelerated and accelerated filers, and 45 days for all other registrants.
Form 8-K: the current report
The 8-K is the SEC’s mechanism for the news that cannot wait for the next quarterly report. Investor.gov defines it as “the report that companies must file with the SEC to announce major events that shareholders should know about.” The general rule: companies have four business days to file an 8-K once the triggering event happens. (There are narrow exceptions — for example, an 8-K filed only to comply with Regulation FD may have an even shorter deadline.)
Each 8-K reports under one or more numbered items. The items are organized into sections that double as a useful map of what an 8-K can possibly say:
| Section | What it covers | Common items investors actually watch |
|---|---|---|
| 1 — Business & operations | Material agreements; bankruptcy; cybersecurity incidents | 1.01 (new material contract), 1.05 (material cyber incident) |
| 2 — Financial information | M&A close; earnings releases; major debt; impairments | 2.01 (deal close), 2.02 (results of operations — earnings press release), 2.06 (material impairment) |
| 3 — Securities & trading markets | Delisting; unregistered share sales; changes to security rights | 3.02 (PIPE), 3.03 (preferred-share modifications) |
| 4 — Auditor & financial statements | Auditor changes; non-reliance on prior financials (restatement notice) | 4.01 (auditor change), 4.02 (restatement — a yellow flag) |
| 5 — Governance & management | CEO/CFO/director changes; bylaw amendments; shareholder vote results | 5.02 (officer departures, severance, new pay plans), 5.07 (annual meeting vote results) |
| 7 — Regulation FD | Material non-public information disclosed selectively now made public | 7.01 (Reg FD disclosure — often hosts investor-day slides) |
| 8 — Other events | Anything material the other items do not cover | 8.01 (the catch-all) |
One nuance worth flagging: most quarterly earnings press releases are furnished — not filed — under Item 2.02. “Furnished” means the disclosure is technically not subject to Section 18 liability under the Exchange Act, although the SEC’s anti-fraud rules still apply. That distinction comes up whenever lawyers debate whether a guidance statement is binding.
A simple worked example: reading one company’s quarter
Suppose a large-cap technology company with a September 30 fiscal year-end reports its full-year results. Here is the document trail an investor would expect to see, in order:
- Day of earnings. The company issues a press release with quarterly revenue, EPS, and segment detail. It simultaneously files an 8-K under Item 2.02 attaching that press release as Exhibit 99.1. A second Item 7.01 8-K often accompanies the slide deck used on the earnings call.
- Within four business days of any related events. If the same day brings a CFO retirement and a new $4 billion buyback authorization, those go in 8-Ks under Items 5.02 and 8.01 respectively.
- Within 60 days of fiscal year-end. The 10-K is filed. This is the audited document — the same numbers from the press release, plus an auditor’s report, full footnotes, risk factors, and MD&A.
- 40 days after the December quarter-end. The first 10-Q of the new fiscal year is filed, showing unaudited Q1 results.
- Once a year. A proxy statement (DEF 14A — a separate form, not covered here) is filed for the annual meeting.
The press release moves the stock; the 10-K is what an analyst should reconcile against. The two should agree. If they do not — or if the 10-K materially restates anything from the press release — that itself is a red flag worth understanding.
Common mistakes investors make
- Confusing the press release with the 10-K. A press release is marketing-flavored; the 10-K is audited. Numbers can match while emphasis, footnotes, and risk factors diverge sharply.
- Treating an Item 2.02 8-K as the final number. It is the earnings press release. The audited financial statements come weeks later in the 10-K (or reviewed unaudited statements in the 10-Q).
- Ignoring the risk-factor diff. The most informative thing in a 10-Q is often the new risk factor management chose to add since the last 10-K.
- Skipping the footnotes. Revenue recognition policy, segment economics, off-balance-sheet items, lease obligations, stock-based compensation, and material subsequent events live in the footnotes — not on the face of the income statement.
- Assuming all 8-K items are equal. An Item 4.02 (non-reliance on previously issued financials) is a different animal than an Item 7.01 (a Regulation FD disclosure of an investor-day slide deck). Read the item number first.
Roughly how many 8-Ks does a company file?
SEC EDGAR’s full-text search makes it easy to see how often each item gets used. The chart below shows the relative frequency of common 8-K items across a representative basket of S&P 500 filings — useful for a learner trying to recognize which items they will run into in practice. The order will be familiar to anyone who reads a few quarters of filings: earnings press releases (2.02) and other-events catch-alls (8.01) dominate, with governance changes (5.02 and 5.07) in the next tier.
Where you actually read these filings
All three forms are filed electronically and posted to the SEC’s EDGAR system, which is free and public. Search by ticker or company name, set the form-type filter to 10-K, 10-Q, or 8-K, and the most recent version is one click away. Many investors also use the company’s own investor-relations site, which usually mirrors EDGAR filings the same day. For pre-formatted financial data tied to the same filings, the SEC’s XBRL viewer and structured-data programs make the underlying numbers machine-readable.
What to learn next
- Proxy statement (DEF 14A). Annual filing detailing executive pay, board nominees, shareholder proposals, and audit-fee disclosures. Read this after the 10-K.
- Forms 3, 4, and 5. Insider transactions — how to see when an officer or 10% holder buys or sells stock.
- Form 13F. Quarterly long-only equity holdings of institutional managers with over $100 million under management.
- Form S-1 and prospectuses. The initial registration statement for an IPO — many of the same disclosures as a 10-K, plus the offering structure.
Sources
- SEC / Investor.gov — Form 10-K glossary entry
- SEC / Investor.gov — Form 10-Q glossary entry
- SEC / Investor.gov — Form 8-K glossary entry
- 17 CFR § 249.310 — Form 10-K rule text (Cornell LII)
- 17 CFR § 249.308a — Form 10-Q rule text (Cornell LII)
- 17 CFR § 249.308 — Form 8-K rule text (Cornell LII)
- 17 CFR § 240.12b-2 — Definitions of accelerated, large accelerated, and smaller reporting filers
- SEC — 2023 cybersecurity disclosure rule (Item 1.05 of Form 8-K)
- SEC — EDGAR company filing search
Disclosure: This article was produced with AI assistance and reviewed before publication. It is for informational purposes only and is not investment advice.