# Johann Koster

> Swiss commercial-register person record from Swiss Graph (graph.swiss),
> sourced from the Swiss Official Gazette of Commerce (SHAB/SOGC).
> Canonical profile: https://graph.swiss/people/johann-koster/67330

## Registry facts

- Residence: Appenzell
- Nationality: CH
- Status: active

## Mandates (4)

- YK Invest AG (CHE-321.312.487) — member of the board — individual signing authority
- KUK Group AG (CHE-437.421.728) — chairperson of the board — individual signing authority
- Caterra AG (CHE-229.703.046) — chairperson of the board — joint signing authority (any two to sign)
- De Martin AG Surface Technology (CHE-101.520.567) — member of the board — without signing authority

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Machine-readable variant of https://graph.swiss/people/johann-koster/67330: registry facts only.
Site overview for agents: https://graph.swiss/llms.txt