Quantisimo to go public via SPAC at $666M valuation

What's the deal? Quantisimo Corp.Dealroom has a profile for this one. Try Dealroom →, a quantum technology vehicle backed by WISeQey Corp. and its subsidiary SEALSQ Corp.Dealroom has a profile for this one. Try Dealroom →, has signed a definitive agreement to merge with SPAC GigCapital8 Corp.Dealroom has a profile for this one. Try Dealroom → and list on the Nasdaq Capital Market. The combination implies a pro forma equity value of roughly $666.1 million at $10.00 per share.

How it works: Quantisimo and GigCapital8 would become subsidiaries of a new British Virgin Islands holding company, Quantisimo Holding Corp., trading under the ticker "QSMO." WISeQey and SEALSQDealroom has a profile for this one. Try Dealroom → would receive an aggregate 66,610,000 shares and are expected to hold a majority of outstanding ordinary shares after closing.

Why now? The definitive agreement follows a letter of intent announced on June 24, 2026. The transaction is expected to close in the first quarter of 2027, subject to GigCapital8 shareholder approval and other customary conditions.

What's the endgame? Before closing, WISeQey and SEALSQ plan to fold in their interests in Miraex SADealroom has a profile for this one. Try Dealroom →, SEALCOIN AG, WeCan Group SADealroom has a profile for this one. Try Dealroom →, and WISeSat.Space Holdings Corp. Carlos Moreira, chief executive officer of WISeQey, SEALSQ, and WISeSat.Space, said the deal offers "a path to the U.S. public markets" to connect digital trust foundations with quantum computing and secure infrastructure.

The fine print: The transaction requires a minimum of $15 million in available cash, funded through GigCapital8's trust account, any private investment in public equity, and a matching cash contribution from SEALSQ. WISeQey, SEALSQ, and the SPAC sponsor have agreed to six-month lock-up periods after closing.

The signal: The deal gives a cluster of quantum-security and secure-infrastructure assets a consolidated route to the public markets through a SPAC — a vehicle regaining use as niche deep-tech firms seek listings without a traditional IPO.

Read more: streetinsider.com

Image credit: IBM Research