SEC CENTRAL INDEX KEY

AMERICAN TOWER CORP /MA/ CIK Number

The SEC Central Index Key (CIK) for AMERICAN TOWER CORP /MA/ (AMT).

CIK (CENTRAL INDEX KEY)
0001053507
Also written as 1053507 (without leading zeros).
Company
AMERICAN TOWER CORP /MA/
Ticker
AMT
Download AMT filings (PDF) →View on SEC EDGAR

What is a CIK number?

A CIK (Central Index Key) is the unique, permanent identifier the U.S. Securities and Exchange Commission assigns to every filer — companies, funds, and individuals — in its EDGAR system. Unlike a stock ticker, a CIK never changes: even if AMERICAN TOWER CORP /MA/ changed its ticker or name, its CIK (0001053507) would stay the same.

That stability is why the CIK is the most reliable way to pull a company's filings programmatically. Every 10-K, 10-Q, 8-K, and Form 4 for AMERICAN TOWER CORP /MA/ is indexed under CIK 0001053507.

CIK vs ticker — what is the difference?

  • Ticker (AMT) — exchange trading symbol; can change or be reused.
  • CIK (0001053507) — SEC filer ID; permanent, one per filer, used across all EDGAR filings.
  • Leading zeros are optional: 0001053507 and 1053507 refer to the same filer.

How to use AMERICAN TOWER CORP /MA/'s CIK

Paste CIK 0001053507 into EDGAR full-text search to see every filing, or skip the friction and download AMT filings as clean PDFs here. To look up any other company's CIK, use the CIK lookup directory.

Source: SEC EDGAR company index (sec.gov). CIK data is public.