Exhibit 8.1
List of significant subsidiaries of the Registrant
| Group Company Name | Country of incorporation |
| WISeKey SA | Switzerland |
| WISeKey Semiconductors SAS | France |
| WiseTrust SA | Switzerland |
| WISeKey (Suisse) SA | Switzerland |
| WISeKey ELA SL | Spain |
| WISeKey SAARC Ltd | U.K. |
| WISeKey USA Inc* | U.S.A. |
| WISeKey India Private Ltd** | India |
| WISeKey KK | Japan |
| WISeKey Taiwan | Taiwan |
| WISeCoin AG*** | Switzerland |
| WISeKey Equities AG | Switzerland |
| WISeCoin France R&D Lab SAS | France |
| WISeKey Semiconductors GmbH | Germany |
| * 50% owned by WISeKey SA and 50% owned by WiseTrust SA | |
| ** 88% owned by WISeKey SAARC which is controlled by WISeKey International Holding AG | |
| *** dormant but owns WiseCoin France R&D Lab SAS |
