What is an 8-K?

What triggers an 8-K?

The SEC keeps a defined list of reportable events, organized into numbered items. A company can’t pick and choose: if a listed event happens, the 8-K is mandatory.

The items that move markets most often:

• Item 2.02 — Results of operations. Earnings. When a company announces quarterly results, the press release typically arrives as an exhibit to an 8-K, days or weeks before the full 10-Q or 10-K follows.
• Item 1.01 — Entry into a material agreement. Signed merger agreements, major customer contracts, joint ventures.
• Item 5.02 — Departure or appointment of directors and officers. A CEO resignation reaches the public as an 8-K, not a press conference.
• Item 1.03 — Bankruptcy or receivership.
• Item 7.01 — Regulation FD disclosure. Material information a company shared selectively and now must publish broadly. Like Item 8.01, this content is “furnished” rather than “filed” — a liability distinction that matters more to securities lawyers than to readers.
• Item 8.01 — Other events. The voluntary catch-all. Companies use it for anything they consider worth disclosing that doesn’t fit a numbered item.

There are dozens more — auditor changes, delisting notices, amendments to articles of incorporation. The full item list runs in the form’s official instructions, linked in the sources below.

When must an 8-K be filed?

Four business days after the triggering event, for most items. That deadline is the reason 8-Ks are the fastest-moving disclosure in the SEC system: a 10-K arrives once a year on a schedule everyone knows, but an 8-K can land any afternoon, about anything, from any company you follow.

Two practical consequences. First, the market often reacts to the event before the filing — a merger leaks, the stock moves, and the 8-K confirms. Second, and more useful: plenty of 8-Ks don’t leak. Executive departures filed quietly at 4:01pm on a Friday, a material contract with no press release attached, an Item 8.01 disclosure nobody was watching for. Those are the filings where reading the document first matters.

What’s actually in an 8-K?

Less than you’d expect. An 8-K is typically two to five pages: the item number, a few paragraphs describing the event, and exhibits — the press release, the merger agreement, the departing executive’s separation terms. There’s no audited financial package, no risk-factor section, no management discussion. It’s a bulletin, not a report.

That brevity cuts both ways. An 8-K is fast to read, but the meaning often sits in what’s attached or what’s missing. An Item 5.02 that names a permanent successor reads very differently from one that announces an interim appointee and a search committee.

How investors use 8-Ks

Three common patterns:

1. Event monitoring. Watching specific companies for material news — the use case the form was designed for.
2. Pattern reading. A cluster of 8-Ks from one company (auditor change, then CFO departure, then a delayed 10-Q) tells a story no single filing does.
3. Sector signals. Item 1.01 contract awards across an industry — defense, construction, biotech — map where money is moving before earnings season says it out loud.

Where to find 8-K filings

Every 8-K is public on SEC EDGAR the moment it’s accepted, free. Search by company name or ticker and filter the filing type to 8-K. EDGAR gives you the documents; what it doesn’t give you is triage — on a busy day, US companies file hundreds of 8-Ks, and EDGAR won’t tell you which ones matter. That’s the problem Gunpowder’s daily digests and scoring pipeline exist to solve.