Wertpapierkennummer

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The Wertpapierkennnummer, (WKN, WPKN, WPK or simply Wert), is a German securities identification code. Six digits or capital letters (excluding I and O), no check digit.

There have been several changes in the WKN definition:

  • WKN were switched from numeric to alphanumeric on 2003-07-21, as described in this German pdf
  • The first 2-4 Letters may show the issuer of the Instrument, as described in this German pdf
  • The number ranges representing different classes of securities have been cancelled long ago.

The WKNs and DE-ISINs are provided by WM-Datenservice.

WKNs may be obsolete in future, and be replaced by ISINs.

Before the German spelling reform of 1996 the correct spelling was "Wertpapierkennummer".

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