What is an 8-K filing in simple terms?

An 8-K is a current events report that public companies must file with the SEC within 4 business days of a material event. Material events include earnings releases, CEO changes, acquisitions, bankruptcies, and significant agreements. It's the SEC's way of ensuring investors get timely notice of important developments.

What events trigger an 8-K filing?

Common triggers include: entering or terminating a material agreement, reporting quarterly or annual financial results (Item 2.02), changes in executive leadership (Item 5.02), acquisitions or dispositions of assets, bankruptcy or receivership, and amendments to the company's charter or bylaws.

How quickly must a company file an 8-K?

Companies must file an 8-K within 4 business days of the triggering event. Some events, like earnings releases, often result in an 8-K being filed on the same day as the press release.

How do I get notified when a company files an 8-K?

EDGAR provides free RSS feeds you can subscribe to for any company's filings, including 8-Ks. Because 8-Ks are filed on short notice, real-time notifications are valuable for tracking material events.

What Is an 8-K Filing? A Plain-English Guide

An 8-K is a current events report that publicly traded companies must file with the SEC within 4 business days of a material event. Unlike the 10-K (annual report) or 10-Q (quarterly report), the 8-K has no fixed schedule - it’s triggered by specific events that shareholders need to know about promptly.

The 8-K is one of the most important filings for active investors because it captures real-time developments: earnings surprises, executive departures, acquisitions, debt issues, and more.

What is an 8-K filing?

An 8-K (also called a “current report”) is the SEC form companies use to disclose material events between quarterly and annual reports. “Material” means the information would likely influence an investor’s decision to buy or sell the stock.

The SEC requires the 8-K to be filed within 4 business days of the triggering event. Some events - like earnings announcements - often result in same-day filings.

What events trigger an 8-K?

The SEC specifies exactly which events require an 8-K, organized by Item number. Here are the most important ones for investors:

Item	Trigger
1.01	Entry into a material definitive agreement
1.02	Termination of a material definitive agreement
1.03	Bankruptcy or receivership
2.01	Completion of acquisition or disposition of assets
2.02	Results of operations (earnings release)
2.03	Creation of a direct financial obligation
4.01	Changes in the company’s auditor
5.01	Changes in control of the company
5.02	Departure/appointment of directors or officers (CEO, CFO, etc.)
5.03	Amendments to charter or bylaws
7.01	Regulation FD disclosure (material non-public information shared with analysts)
8.01	Other material events
9.01	Financial statements and exhibits

Item 2.02 (earnings results) is the most commonly filed 8-K. When a company announces quarterly earnings, they typically file an 8-K attaching the press release on the same day.

Item 5.02 (leadership changes) is closely watched by investors. A surprise CEO departure can move a stock significantly.

What’s inside an 8-K?

An 8-K is typically much shorter than a 10-K or 10-Q. It has three core components:

Cover page - identifies the company, the filing date, and the Item(s) being reported
Item description - a brief narrative describing the event. For an earnings release, this is usually just one paragraph pointing to the attached press release
Exhibits - the actual documents. Item 2.02 filings almost always attach the earnings press release as Exhibit 99.1

Most 8-Ks are 2–10 pages long. The actual substance is often in the exhibit (the press release or agreement).

How to read an 8-K

Reading an 8-K is faster than reading a 10-K. Here’s how:

Note the Item number - this tells you what kind of event triggered the filing
Read the narrative section - the company describes the event in plain language
Check the exhibits - the real detail is in the attached documents (earnings press release, agreement text, etc.)

For earnings-related 8-Ks (Item 2.02), the press release exhibit typically contains revenue, earnings per share, guidance, and management commentary. This is often the first place analysts look when a company reports results.

8-K vs 10-K vs 10-Q: how they differ

	8-K	10-Q	10-K
Trigger	Material event	End of fiscal quarter	End of fiscal year
Schedule	No fixed schedule	3x per year	Once per year
Length	2–10 pages	20–80 pages	50–200+ pages
Audited?	No	Reviewed (not audited)	Yes
Purpose	Timely event disclosure	Quarterly financial update	Annual comprehensive report

How to get 8-K filing alerts

Because 8-Ks can be filed at any time and contain market-moving information, real-time alerts are valuable. The SEC provides free RSS feeds on EDGAR for any company’s filings. You can subscribe to a specific company’s feed to get notified when new filings (including 8-Ks) are posted. There are also third-party tools that provide email alerts and filtering.

For more on setting up alerts, see our SEC filing alerts guide.