SEC CENTRAL INDEX KEY

UNION PACIFIC CORP CIK Number

The SEC Central Index Key (CIK) for UNION PACIFIC CORP (UNP).

CIK (CENTRAL INDEX KEY)
0000100885
Also written as 100885 (without leading zeros).
Company
UNION PACIFIC CORP
Ticker
UNP
Download UNP 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 UNION PACIFIC CORP changed its ticker or name, its CIK (0000100885) 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 UNION PACIFIC CORP is indexed under CIK 0000100885.

CIK vs ticker — what is the difference?

  • Ticker (UNP) — exchange trading symbol; can change or be reused.
  • CIK (0000100885) — SEC filer ID; permanent, one per filer, used across all EDGAR filings.
  • Leading zeros are optional: 0000100885 and 100885 refer to the same filer.

How to use UNION PACIFIC CORP's CIK

Paste CIK 0000100885 into EDGAR full-text search to see every filing, or skip the friction and download UNP 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.