Foreign private issuer (FPI)
A non-US company that meets SEC tests for foreign status, which lets it use Forms 20-F and 6-K and skip some domestic reporting rules.
The SEC generally treats a foreign company as a foreign private issuer unless more than half of its voting securities are held by US residents and certain business or management tests also point to the US. FPIs can file Form 20-F and Form 6-K in place of Forms 10-K, 10-Q and 8-K, and some domestic rules, such as quarterly reporting, do not apply in the same way.
Traders care because fewer scheduled filings mean less regular disclosure, so home-market filings and 6-Ks become more important. FPI status is tested periodically, and a company that loses it must begin domestic reporting. Check the status and the filing calendar before relying on quarterly data.
Worked example (illustrative numbers, not real data): a company that loses FPI status would have to start filing quarterly Form 10-Q reports, which means more regular US disclosure within a shorter timeframe.