Editing Form 10-K (section)

==Related forms==
Unlike the 10-K filed annually, other forms serve related purposes, but have different schedules. [[Form 10-Q]], much briefer, is filed after each of the three quarters that do not have a 10-K filing.  [[Form 8-K]] covers special material events that occur between 10-K and 10-Q filings.

A substantial number of firms filed their 10-K as a [[Form 10-K405]] during the late 1990s and early 2000s (decade).  A 10-K405 is a 10-K where the [[Regulation S-K]] Item 405 box on the cover page is checked.  Due to confusion in its application, the 10-K405 was eliminated in 2002.