CIK (Central Index Key): SEC Company Identifier Explained

What Is a CIK?

CIK stands for Central Index Key—a unique 10-digit number assigned by the U.S. SEC to every entity that files reports (companies, funds, individuals).

Purpose

• Unambiguous identification in SEC databases (EDGAR).
• Quick retrieval of all filings for a given entity.
• Used by investors, analysts, and regulators.

How to Find a CIK

1. Go to SEC EDGAR Company Search.
2. Enter company name or ticker.
3. CIK appears in the results (often with leading zeros).

Examples

• Apple Inc.: 0000320193
• Amazon.com Inc.: 0001018724
• Alphabet (Google): 0001652034
• Microsoft Corp.: 0000789019

CIKs are essential for programmatic access to SEC filings via API or bulk data.