What is an SEC Filing?

An SEC filing is a document that publicly traded companies, investment advisors, and other financial entities are legally required to submit to the U.S. Securities and Exchange Commission (SEC). These filings disclose financial results, business risks, major events, and ownership information, making them freely available to any investor.

Unlike press releases or investor presentations, SEC filings carry legal weight. Executives who sign them certify that the information is accurate. Lying in an SEC filing is securities fraud—a federal crime.

Why do companies file with the SEC?

Public companies don’t file with the SEC voluntarily. They’re legally required to under two foundational pieces of US securities law.

The Securities Act of 1933 was passed in the wake of the 1929 stock market crash and the fraud that preceded it. It requires companies to register their securities before selling them to the public and to disclose material information to potential investors.

The Securities Exchange Act of 1934 created the SEC itself and established the ongoing reporting requirements that public companies follow today. Under this law, companies with publicly traded securities must file periodic reports to keep investors continuously informed—not just at the time of an IPO.

The logic is straightforward: investors can only make good decisions if they have accurate, timely information. Mandatory disclosure levels the playing field between corporate insiders (who know everything about the business) and outside investors (who know only what they’re told). SEC filings are how that information reaches the public in a standardized, legally accountable form.

Types of SEC filings: a complete overview

The SEC has dozens of form types, but a handful matter most for investors tracking public companies.

Filing Type	Full Name	Purpose	Filed By	Frequency
10-K	Annual Report	Full-year financials + business overview	All public companies	Annually
10-Q	Quarterly Report	Quarterly financial update	All public companies	3x/year (Q1–Q3)
8-K	Current Report	Material events (earnings, CEO change, acquisition)	All public companies	As needed
S-1	Registration Statement	IPO registration	Companies going public	Once (at IPO)
DEF 14A	Proxy Statement	Shareholder meeting: compensation, board nominees	All public companies	Annually
Form 4	Insider Transaction	Trades by officers/directors/10%+ owners	Corporate insiders	Within 2 days of trade
13-F	Institutional Holdings	Portfolio holdings disclosure	Funds with $100M+ AUM	Quarterly

The 10-K is the most comprehensive filing a company produces. It covers the full fiscal year with audited financial statements, a detailed business description, a thorough list of risk factors, and management’s own explanation of results.

The 10-Q is a shorter quarterly update filed three times per year. It contains unaudited financial statements and focuses on what changed since the last report. There is no Q4 10-Q—the annual 10-K covers the fourth quarter.

The 8-K is filed within four business days whenever a material event occurs—an acquisition, a CEO departure, an unexpected earnings pre-announcement, a bankruptcy filing, or any other development shareholders would reasonably want to know about. 8-Ks are often the fastest way to learn about major company news before media coverage catches up.

Forms 3, 4, and 5 track insider ownership. When executives or board members buy or sell company stock, these filings disclose it. You can look up any company’s insider transactions on EDGAR.

The DEF 14A (proxy statement) is filed before every annual shareholder meeting. It contains executive compensation tables, board member bios, and descriptions of every item shareholders will vote on. This is where you find CEO pay packages and information about board independence.

Form 4 tracks insider trading. Whenever a corporate officer, director, or 10%-or-greater shareholder buys or sells company stock, they must report the trade within two business days. Patterns in insider buying or selling can be informative signals.

13-F filings are quarterly portfolio disclosures required from any institutional investment manager with $100 million or more in assets under management. These filings reveal which stocks hedge funds and large asset managers hold—though the data is reported with a 45-day lag.

How to find SEC filings on EDGAR

EDGAR (Electronic Data Gathering, Analysis, and Retrieval) is the SEC’s free public database. Every filing from every public company is available there. Here’s how to navigate it:

1. Go to sec.gov/cgi-bin/browse-edgar
2. Enter the company name or ticker symbol in the search box
3. Select a filing type from the dropdown menu—or leave it blank to see all filing types
4. Click Search to see a list of all matching filings, sorted by date
5. Click any filing to see the documents list; the main document is usually the first .htm file

EDGAR returns raw filing documents, which can run to hundreds of pages. If you want to understand the key points quickly without reading a full filing, AssetRoom provides AI-powered summaries with direct links to the original SEC source. For example, you can read Apple’s latest filings on AssetRoom, or browse filings from NVIDIA and Tesla.

How to read an SEC filing

Most SEC filings follow a standardized structure that makes them easier to navigate once you know what to look for.

For annual 10-K filings, three sections matter most:

Financial statements (Item 8) contain the income statement, balance sheet, and cash flow statement for the full year. These are audited by an independent accounting firm. The income statement shows revenue and profit. The balance sheet shows what the company owns and owes. The cash flow statement—especially cash from operations—is often the most reliable indicator of business health.

Risk factors (Item 1A) is where companies disclose anything that could materially harm the business. These sections are often long and can read as legal boilerplate, but pay attention to changes from year to year. New risks added, or old ones removed, can signal real shifts in the business environment.

MD&A (Item 7)—Management’s Discussion and Analysis—is where executives explain the year’s results in plain English. They compare performance to the prior year, discuss what drove changes, and often give directional commentary on what they’re watching. This is typically the most readable and informative section of a 10-K.

For a deeper walkthrough of how to navigate a 100-page annual report, see our guide to how to read a 10-K filing.

Who has to file with the SEC?

The filing requirement applies broadly across the financial industry, not just to publicly traded companies.

Public companies must register with the SEC if they have $10 million or more in total assets and a class of equity securities held by 2,000 or more shareholders (or 500 or more non-accredited investors). Once registered, they must file periodic reports—10-K, 10-Q, 8-K—on an ongoing basis.

Investment advisers managing $100 million or more in assets must register with the SEC and file Form ADV, which discloses their business practices, fee structures, and any disciplinary history.

Broker-dealers are registered with FINRA (which operates under SEC oversight) and must file regular financial reports.

Mutual funds and ETFs are registered investment companies that file prospectuses and annual reports with the SEC.

Foreign companies whose shares trade on US exchanges file the 20-F instead of the 10-K. The 20-F covers similar ground—audited financials, business description, risk factors—but follows slightly different disclosure rules and may use IFRS accounting instead of US GAAP.

Companies that fall below the registration thresholds (or have fewer than 300 shareholders) may apply to deregister and stop filing periodic reports.

SEC filing deadlines

The SEC calibrates filing deadlines based on company size. Larger companies get tighter deadlines on the assumption that they have the resources to close their books faster.

Filing	Large Accelerated Filer	Accelerated Filer	Non-Accelerated Filer
10-K	60 days after fiscal year end	75 days	90 days
10-Q	40 days after quarter end	40 days	45 days
8-K	4 business days after event	Same	Same
Form 4	2 business days after trade	Same	Same

Large accelerated filers are companies with a public float of $700 million or more. Accelerated filers have a public float between $75 million and $700 million. Non-accelerated filers are smaller companies below the $75 million threshold.

Most S&P 500 companies have fiscal years ending December 31, which means their 10-Ks flood EDGAR in February and March. Companies with non-standard fiscal year ends (such as Apple, whose fiscal year ends in late September) file on a different schedule.

Missing a deadline triggers regulatory consequences. Companies can request brief extensions by filing a Form 12b-25 (“NT 10-K” or “NT 10-Q”), which grants a short grace period. Repeated late filings or missed deadlines without an extension can lead to SEC enforcement actions, trading halts, or delisting.

How to get alerts for new SEC filings

Following SEC filings manually is tedious. Most investors use some form of alert system to stay on top of new filings from companies they follow.

AssetRoom provides free email alerts with AI-powered summaries when companies you follow file a 10-K, 10-Q, or 8-K. Instead of just a notification that a filing dropped, you get the key points delivered to your inbox. See our guide to SEC filing alerts for setup instructions.

EDGAR email notifications let you receive alerts directly from the SEC when a company files. You can configure these at sec.gov for any company or filing type.

RSS feeds are available through EDGAR for programmatic or feed-reader consumption. This works well for developers or power users who want to ingest filing data directly.

For a comparison of available tools, see best SEC filing summary tools.