Stock Market Glossary

Securities identification number (WKN)

Six-digit code for unique identification of a security in the DACH region.

In brief: Six-digit code for unique identification of a security in the DACH region.

Meaning in practice

The WKN identifies securities uniquely, parallel to the international ISIN. For online brokers today, the ISIN is usually sufficient, but the WKN remains common in the DACH region.

Context for investors and traders

For legal, tax or formal terms, the specific case matters. Rules, deadlines and obligations can change and can differ by residence, product and broker.

How to use this in practice

For tax and regulatory topics, the process matters more than a general definition: payment country, product type, timing, broker and personal tax data can lead to different outcomes. Keep statements and certificates so transactions remain traceable and can be corrected if necessary.

What to keep in mind

This glossary entry explains the principle, but does not replace a current tax or legal review. Deadlines and documentation can be decisive for withholding tax, loss offsetting, fund taxation and cross-border custody accounts.

What does Securities identification number (WKN) mean in simple terms?

Six-digit code for unique identification of a security in the DACH region.

When is this term relevant to investors?

Use the term for orientation and consult an up-to-date primary source or qualified advice for a concrete transaction. That helps avoid outdated information and false generalisations.

What should I check before acting on Securities identification number (WKN)?

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