SCHEDULE: WISeKey International Holding AG Updates SEALSQ Corp Stake to 4.85% of Ordinary Shares

WISeKey International Holding AG has filed an amendment to its Schedule 13G, reporting beneficial ownership of 4.85% of SEALSQ Corp's Ordinary Shares, while maintaining a controlling 52.41% of total voting power.

Summary

• WISeKey International Holding AG (the "Reporting Person") has filed an Amendment No. 1 to its Schedule 13G regarding its beneficial ownership in SEALSQ Corp.
• The Reporting Person beneficially owns 6,001,200 Ordinary Shares of SEALSQ Corp, representing 4.85% of the class.
• This percentage is calculated based on an aggregate of 123,731,729 Ordinary Shares outstanding on June 30, 2025.
• In addition to the Ordinary Shares, WISeKey International Holding AG also owns 1,499,700 Class F Shares of SEALSQ Corp.
• Combined, the Ordinary Shares and Class F Shares held by WISeKey International Holding AG represent 52.41% of the total voting power for SEALSQ Corp.

Sentiment

Score: 5

Explanation: The filing is primarily a factual disclosure of beneficial ownership. While the percentage of Ordinary Shares decreased, the overall controlling voting power remains, leading to a neutral sentiment.

Positives

• WISeKey International Holding AG maintains a controlling interest in SEALSQ Corp, holding 52.41% of the total voting power through a combination of Ordinary and Class F Shares, indicating continued strategic influence.

Negatives

• The beneficial ownership of SEALSQ Corp Ordinary Shares by WISeKey International Holding AG has decreased to 4.85%, falling below the 5% threshold that typically triggers an initial Schedule 13G filing, suggesting a reduction in their direct stake in this specific share class.

Future Outlook

No forward-looking statements or guidance are provided in this beneficial ownership filing.

Industry Context

This filing highlights the continued significant ownership of SEALSQ Corp, a semiconductor company focused on IoT security, by WISeKey International Holding AG, a cybersecurity and IoT company. This relationship suggests a strategic alignment and potential for synergistic operations within the broader digital security and IoT sectors.

Related Party Transactions

• WISeKey International Holding AG is a significant shareholder of SEALSQ Corp, holding a controlling 52.41% of the total voting power, indicating a related party relationship.

Stakeholder Impact

• Shareholders of SEALSQ Corp may note the slight reduction in WISeKey's direct beneficial ownership of Ordinary Shares, though WISeKey's overall controlling voting power remains intact, suggesting continued strategic influence over the company's direction.

Key Dates

Keywords

SEALSQ Corp, WISeKey International Holding AG, Schedule 13G, Beneficial Ownership, Ordinary Shares, Class F Shares, Voting Power, SEC Filing, Shareholding, Corporate Governance