SEC CENTRAL INDEX KEY

ILLINOIS TOOL WORKS INC CIK Number

The SEC Central Index Key (CIK) for ILLINOIS TOOL WORKS INC (ITW).

CIK (CENTRAL INDEX KEY)
0000049826
Also written as 49826 (without leading zeros).
Company
ILLINOIS TOOL WORKS INC
Ticker
ITW
Download ITW 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 ILLINOIS TOOL WORKS INC changed its ticker or name, its CIK (0000049826) 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 ILLINOIS TOOL WORKS INC is indexed under CIK 0000049826.

CIK vs ticker — what is the difference?

  • Ticker (ITW) — exchange trading symbol; can change or be reused.
  • CIK (0000049826) — SEC filer ID; permanent, one per filer, used across all EDGAR filings.
  • Leading zeros are optional: 0000049826 and 49826 refer to the same filer.

How to use ILLINOIS TOOL WORKS INC's CIK

Paste CIK 0000049826 into EDGAR full-text search to see every filing, or skip the friction and download ITW 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.