The sections in the SEC's Form 8-K instructions are: Section 1, the registrant's business and operations (material agreements, bankruptcy, mine safety, material cybersecurity incidents); Section 2, financial information (completed acquisitions or dispositions, results of operations, new financial obligations, triggering events, exit costs, material impairments); Section 3, securities and trading markets (delisting notices, unregistered equity sales, changes to holders' rights); Section 4, accountants and financial statements (Item 4.01 auditor changes and Item 4.02 non-reliance on prior financial statements); Section 5, corporate governance and management (changes in control, Item 5.02 director and officer departures and appointments, bylaw and fiscal-year changes, shareholder vote results); Section 6, asset-backed securities; Section 7, Regulation FD disclosure; Section 8, other events; and Section 9, financial statements and exhibits.
Unless an item says otherwise, the report is due within four business days after the event. Item 1.05 runs from the date the company determines a cybersecurity incident is material, and Items 7.01 and 8.01, when used to satisfy Regulation FD, follow that regulation's own timing. Information under Item 2.02 (earnings) and Item 7.01 is treated as furnished rather than filed, so it is not subject to Section 18 liability unless the company says otherwise.
Scanning item numbers is the fastest way to triage a company's 8-K history. Items 4.01, 4.02, and 5.02 tend to warrant a closer read than a routine 9.01 exhibit filing.