Quantisimo to go public via SPAC merger, targeting Nasdaq listing

Quantisimo Corp., a quantum technology vehicle established by WISeQey Corp. (Nasdaq/SIX: WQEY) and its subsidiary SEALSQ Corp. (Nasdaq: LAES), has signed a definitive business combination agreement with special purpose acquisition company GigCapital8 Corp. (Nasdaq: GIW) to become a publicly listed company.

Under the agreement, Quantisimo and GigCapital8 would become wholly owned subsidiaries of a newly formed British Virgin Islands holding company, Quantisimo Holding Corp., whose ordinary shares are expected to list on the Nasdaq Capital Market under the ticker symbol "QSMO." The transaction is expected to close in the first quarter of 2027, subject to GigCapital8 shareholder approval and other customary conditions.

WISeQey and SEALSQ would receive an aggregate of 66,610,000 shares in the new public company, implying a pro forma equity value of approximately $666.1 million at $10.00 per share. The two companies are expected to hold a majority of outstanding ordinary shares following closing.

The transaction requires a minimum of $15 million in available cash, to be funded through GigCapital8's trust account, any private investment in public equity (PIPE), and a matching cash contribution from SEALSQ. WISeQey, SEALSQ, and GigCapital8's sponsor have agreed to six-month lock-up periods following closing.

Prior to closing, WISeQey and SEALSQ plan to contribute their interests in Miraex SA, SEALCOIN AG, WeCan Group SA, and WISeSat.Space Holdings Corp. (Nasdaq: SAIQ) to Quantisimo. The definitive agreement follows a letter of intent announced on June 24, 2026.

Carlos Moreira, Chief Executive Officer of WISeQey, SEALSQ, and WISeSat.Space, said the transaction provides "a path to the U.S. public markets" to support Quantisimo's strategy of connecting digital trust foundations with quantum computing and secure infrastructure.

The boards of GigCapital8, Quantisimo, WISeQey, SEALSQ, and the new holding company have approved the combination. GigCapital8's board unanimously recommended shareholder approval. Information is based on a press release issued by the companies on October 9, 2026.

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