Reading ownership filings
What does a 13F portfolio show?
A reported portfolio is a snapshot of certain securities at quarter end.
Why can a filing show an older position?
The position date, SEC acceptance time and site ingest time describe different events.
How do 13F, 13D, 13G and Form 4 differ?
Portfolio reports, beneficial ownership reports and insider transactions have different bases.
Does a portfolio change mean a trade?
A change between quarterly snapshots does not reveal every trade between them.