Form 6-K, 20-F and 40-F: Foreign Issuer Filings

What are Form 6-K, 20-F and 40-F?

A company incorporated outside the United States that lists in the US can often qualify as a foreign private issuer (FPI). FPIs report under a lighter, different set of SEC forms. Instead of an annual 10-K they file a 20-F (or, for eligible Canadian companies, a 40-F). Instead of quarterly 10-Qs and current 8-Ks, they furnish 6-Ks.

The 6-K is the form that confuses most readers. An 8-K is organised by item numbers (Item 1.01 for a material agreement, Item 3.02 for unregistered sales, and so on), so you can tell what happened from the cover page. A 6-K has no item numbers at all. To know what a 6-K is about, you have to open its exhibits.

What makes a company a foreign private issuer (FPI)

FPI status is a test, not a label a company picks. It is defined in Exchange Act Rule 3b-4 and Securities Act Rule 405, and the company re-tests itself once a year, as of the last business day of its second fiscal quarter.

A non-US company is an FPI unless both of the following are true:

1. More than 50% of its outstanding voting securities are held of record by US residents, and
2. Any one of these applies: a majority of its executive officers or directors are US citizens or residents, more than 50% of its assets are in the US, or its business is administered principally in the US.

A company that fails the test must switch to domestic forms (10-K, 10-Q, 8-K, proxy statements). A company that passes can still choose to file domestic forms voluntarily, and some do.

20-F vs 40-F vs 6-K side by side

The 20-F deadline is the one most people get wrong. A domestic non-accelerated filer has 90 days after year end for its 10-K; an FPI has four months for its 20-F. A December year-end FPI therefore has until the end of April.

Why a 6-K has no item numbers

The 8-K is built around a list of triggering events that the SEC defined. The 6-K is built around a different idea: whatever the company discloses at home, it also furnishes to the SEC. Rules 13a-16 and 15d-16 tie the 6-K to the company's home-country obligations, its stock exchange's requirements, and what it sends to its own security holders. Because the trigger is "we disclosed it somewhere else", there is no SEC list of events to number.

Two consequences follow:

• A 6-K can be about anything. Earnings, an AGM notice, a director resignation, a financing, a reverse split, a change in auditor. The cover page looks the same for all of them.
• A 6-K is "furnished", not "filed". Furnished reports carry less liability under Section 18 of the Exchange Act, unless the company states that the report is incorporated by reference into a registration statement. Many small FPIs add exactly that sentence, so the 6-K becomes part of a shelf registration on Form F-3.

Reading a 6-K: start with the exhibits

Because the cover tells you almost nothing, the reading order is different from an 8-K:

1. The exhibit index. Exhibit 99.1 is usually a press release. Exhibit 10.x is usually an agreement (a securities purchase agreement, a placement agency agreement, a warrant form). Exhibit 1.1 is often an underwriting or sales agreement.
2. The incorporation-by-reference sentence. If the 6-K says it is incorporated into an F-3, it is probably tied to an offering.
3. The body text, if any. Some 6-Ks contain a short paragraph above the exhibits summarising the event.

A financing by an FPI usually leaves two documents: a 6-K with the agreements, and a 424B5 prospectus supplement describing the offering off the F-3 shelf (how to read a 424B5). The same pairing appears for a domestic company's 8-K and 424B5.

A worked example: a registered direct offering through ADSs

Many FPIs trade in the US as American Depositary Shares (ADSs), each representing a fixed number of ordinary shares. That ratio matters for dilution math.

Take hypothetical Company X. It has 200,000,000 ordinary shares outstanding, and each ADS represents 10 ordinary shares. It furnishes a 6-K with a securities purchase agreement for a registered direct offering (compared with PIPEs) of 3,000,000 ADSs at $2.00 per ADS.

All figures are hypothetical.

A reader who compares 3,000,000 new ADSs with 200,000,000 ordinary shares would compute 1.5% and be off by a factor of ten. Always convert to one unit first.

What FPIs are exempt from, and what changed in 2026

FPIs have long been exempt from several rules that bind domestic issuers:

• No quarterly report requirement. There is no 10-Q. Interim results arrive on 6-K, when the home country or the exchange requires them. Nasdaq, for example, requires FPIs to furnish at least a semi-annual interim balance sheet and income statement (Nasdaq Listing Rule 5250(c)(2)).
• No US proxy rules. Meeting materials are furnished on 6-K rather than filed as a DEF 14A.
• No Regulation FD.
• Section 16 has been narrowed, not removed. The Holding Foreign Insiders Accountable Act, signed on December 18, 2025, made directors and officers of FPIs with Section 12-registered equity subject to Section 16(a) reporting from March 18, 2026. They now file Forms 3, 4 and 5, including Form 4 within two business days of a trade (see Form 4 transaction codes). Holders of more than 10% are not covered, and FPI insiders remain outside Section 16(b) short-swing profit recovery. An SEC exemptive order relieves insiders of FPIs in certain jurisdictions (including Canada, the UK, the EEA, Switzerland, Chile and South Korea) that report under substantially similar home rules.

So an FPI insider purchase that was invisible on EDGAR before March 2026 may now appear as a Form 4, while an insider of an exempted Canadian or UK issuer still reports at home.

How to check a company on Signal8

• The live SEC filings feed includes 6-K, 20-F and 40-F filings alongside domestic forms, so you can filter to foreign-issuer reports.
• Every company page has a filings tab listing filings by form type (for example AAPL's filings tab). For a foreign private issuer, that is where its 6-Ks and 20-Fs appear.
• Open a symbol in the Terminal to read filings next to price and news.

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