In this reading
The form names in an SEC filing identify different reporting systems and periods. Their history helps explain why an older or foreign filing may not use the Form 10-K and Form 10-Q pattern.
Follow annual and interim reporting
The SEC adopted Form 10-K in 1935. Reporting between annual reports changed several times. Limited quarterly reports began in 1946, and that requirement ended in 1953. Semiannual Form 9-K followed in 1955. In 1970, Form 10-Q replaced the semiannual report.
Interim reporting means reporting for a period within the financial year. Under the current quarterly system, a domestic operating company normally files three Forms 10-Q and one annual Form 10-K. The annual report covers the fourth quarter as part of the full year. The SEC recounts these changes in its reporting-history discussion, pages 8–10.
Recognize former small-company forms
Older filings may say 10-KSB, the annual report for a qualifying small business issuer, or 10-QSB, its quarterly counterpart. The SEC's 1992 small-business disclosure system allowed reduced disclosure requirements. A 2008 reform moved those requirements into the common reporting system. Eligible smaller companies now use Forms 10-K and 10-Q with permitted reduced disclosures.
The forms disappeared on different dates: Form 10-QSB on October 31, 2008, and Form 10-KSB on March 15, 2009. An old 10-KSB is therefore a historical annual report, not a current filing category. See the final rule's effective dates and background.
Check a foreign issuer's system
A foreign private issuer is a foreign company that meets the SEC's eligibility rules for that reporting category. Foreign incorporation alone does not settle its status. These companies usually file annual reports on Form 20-F. They furnish important information released under home-country, exchange, or shareholder reporting requirements on Form 6-K. A 6-K can include interim financial statements, but it is not a uniform quarterly replacement for Form 10-Q. See the SEC's foreign-issuer overview.
Eligible Canadian issuers can use Form 40-F for annual reporting under the Multijurisdictional Disclosure System, a US-Canadian arrangement effective in 1991. It permits qualifying Canadian documents to serve US reporting needs. These issuers also use Form 6-K. Canada does not automatically mean 40-F: check the company's eligibility and actual filings.
Also identify the accounting framework and currency in the statements and auditor's report. A foreign issuer's filing on EDGAR does not by itself establish US GAAP or US dollars. The SEC's Financial Reporting Manual, Topic 16 explains the system and its limits.
Separate proposals from current requirements
As checked on September 10, 2026, the SEC listed its May 5 semiannual-reporting proposal as a proposed rule. Companies then filing quarterly reports could choose one six-month report on a new Form 10-S, plus the annual Form 10-K. That would replace three Forms 10-Q plus the annual report. The proposal retained annual reporting and an interim report; it did not offer annual-only reporting. The SEC's announcement states the proposed choice, and its rulemaking index records the status.
Semiannual reporting may reduce a company's preparation work, but investors would wait longer for updated information. The SEC discusses these tradeoffs in the proposal's economic analysis, page 66. For filing analysis, check both the form and its reporting period. A proposal about future frequency does not change an existing filing.
Quick checkA Canadian company's annual filing is a Form 40-F. Does the absence of a Form 10-K prove that its annual report is missing?
Answer: No. An eligible Canadian issuer may report on Form 40-F. Inspect the company's actual filing and reporting period before deciding what evidence is missing.
Connect a tagged amount to the displayed report
Electronic filing made public documents searchable through EDGAR. Structured data added labels that programs can read. The SEC made its operating-company XBRL requirements mandatory in 2009 and adopted Inline XBRL rules in 2018, with implementation phased in. XBRL means eXtensible Business Reporting Language. Inline XBRL puts computer-readable facts into the human-readable report. See the SEC's structured-data history and Inline XBRL rule guide.
A tagged amount may be stored in dollars while the statement displays millions of dollars. Apple's 2025 balance sheet displays inventory of 5,718 in millions. The preserved XBRL file in the filing packet records the matching InventoryNet fact as 5,718,000,000 US dollars as of September 27, 2025. Multiplying the displayed figure by 1,000,000 gives the same amount.
A tagged fact needs its account concept, entity, period, units, and filing identity. Some facts also carry dimensions, which identify a category such as a business segment. A fact for one segment is not interchangeable with the consolidated total. The human-readable statement or note supplies headings and policy context that the isolated fact may omit. A data match can confirm that two presentations carry the same figure; it cannot establish whether the company applied its accounting policy correctly.
Return to Chapter 5: Interpret financial information in public filings.