SCHEDULE: WISeKey International Holding AG Amends SEALSQ Corp Stake, Discloses 52.41% Voting Power

WISeKey International Holding AG has filed an amended Schedule 13G, disclosing beneficial ownership of 4.85% of SEALSQ Corp's Ordinary Shares, which, combined with Class F Shares, represents 52.41% of total voting power.

Summary

• WISeKey International Holding AG beneficially owns 6,001,200 Ordinary Shares of SEALSQ Corp.
• This ownership represents 4.85% of SEALSQ Corp's Ordinary Shares outstanding.
• The ownership percentage for Ordinary Shares is calculated based on an aggregate of 123,731,729 Ordinary Shares outstanding as of June 30, 2025.
• WISeKey International Holding AG also holds 1,499,700 Class F Shares of SEALSQ Corp.
• Together, the Ordinary Shares and Class F Shares held by WISeKey International Holding AG represent 52.41% of the total voting power for SEALSQ Corp.
• The document is an Amendment No. 1 to a Schedule 13G filing.

Sentiment

Score: 6

Explanation: The filing is primarily a factual disclosure of ownership. The disclosure of a controlling voting stake (52.41%) by WISeKey International Holding AG in SEALSQ Corp could be viewed positively by investors seeking stability or strategic direction, but it is not a performance report.

Positives

• The filing indicates a significant, controlling voting stake of 52.41% by WISeKey International Holding AG in SEALSQ Corp, suggesting strong strategic alignment and stable governance.

Future Outlook

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

Industry Context

This filing indicates a significant ownership stake by WISeKey International Holding AG in SEALSQ Corp, suggesting a close relationship or strategic control. This could imply vertical integration or a strategic partnership within the cybersecurity, IoT, or semiconductor industries, where both companies operate, potentially influencing future strategic direction.

Related Party Transactions

• The ownership structure disclosed implies a related party relationship between WISeKey International Holding AG and SEALSQ Corp due to WISeKey's controlling voting interest.

Stakeholder Impact

• Shareholders of SEALSQ Corp should note that WISeKey International Holding AG holds a controlling voting interest (52.41%), which could significantly influence future corporate decisions, strategic direction, and potential merger and acquisition activities.

Key Dates

Recommendation

This Schedule 13G filing primarily discloses a significant, controlling voting stake by WISeKey International Holding AG in SEALSQ Corp. While the 4.85% ownership of Ordinary Shares is below the 5% threshold for a new 13G, the combined 52.41% voting power (including Class F shares) is a critical detail. This indicates that WISeKey has effective control over SEALSQ Corp. For investors, this confirms a stable ownership structure and potential strategic alignment, but the filing itself does not provide new financial performance data or strategic initiatives that would warrant a 'buy' or 'sell' recommendation. It is a confirmation of existing control, suggesting a 'hold' position while awaiting further operational or financial updates from SEALSQ Corp.

Keywords

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