Central Index Key
Encyclopedia
A Central Index Key or CIK number is a number given to an individual or company by the United States Securities and Exchange Commission
United States Securities and Exchange Commission
The U.S. Securities and Exchange Commission is a federal agency which holds primary responsibility for enforcing the federal securities laws and regulating the securities industry, the nation's stock and options exchanges, and other electronic securities markets in the United States...

. The number is used to identify the filings of a company, person, or entity in several online databases, including EDGAR
EDGAR
EDGAR, the Electronic Data-Gathering, Analysis, and Retrieval system, performs automated collection, validation, indexing, acceptance, and forwarding of submissions by companies and others who are required by law to file forms with the U.S. Securities and Exchange Commission...

.

The numbers are ten digits in length.
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