CIK number (Central Index Key)

A CIK number is a unique identification code assigned by the SEC (Securities and Exchange Commission) to every company that files financial reports with them. Think of it like a social security number for corporations. You'll encounter CIK numbers when digging through SEC filings—the official documents companies must submit showing their financial health, executive compensation, and other important details. It matters because it's the fastest way to find a specific company's filings without wading through thousands of results. For example, if you're researching TechCorp Industries, you'd search their CIK number instead of their name to pull up all their official SEC documents instantly. Most financial research sites let you search by CIK to save time.