GigCapital8, Quantisimo sign definitive merger; WISeQey/SEALSQ quantum platform valued ~$666M, to list on Nasdaq as QSMO

GigCapital8 Corp.

Definitive merger signed Oct 8, 2026: WISeQey and SEALSQ to receive 66,610,000 PubCo shares, implying ~$666.1M pro forma equity value at $10.00/share and majority ownership of PubCo.
Closing requires at least $15M cash: GigCapital8 trust proceeds after redemptions plus any PIPE, with matching cash from SEALSQ receiving additional PubCo shares at $10.00 each.
Expected to close Q1 2027; PubCo Quantisimo Holding Corp. to list on Nasdaq Capital Market as 'QSMO'. GigCapital8 Class A shares exchange 1:1; five rights convert to one PubCo share.
WISeQey, SEALSQ and GigCapital8's sponsor signed six-month lock-ups; sponsor to vote for the deal and not redeem. GigCapital8's board unanimously recommends the transaction.
Quantisimo combines Miraex SA, SEALCOIN AG, WeCan Group SA and WISeSat.Space (Nasdaq: SAIQ); CEO Carlos Moreira cites 'Root to Qubit' sovereign quantum platform.

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