Quantisimo Signs SPAC Deal With GigCapital8 at $666M, Nasdaq Ticker QSMO

Quantisimo Corp., the special purpose vehicle built by WISeQey Corp (Nasdaq/SIX: WQEY) and its subsidiary SEALSQ Corp (Nasdaq: LAES), said on October 9, 2026 that it signed a definitive Agreement and Plan of Merger with GigCapital8 Corp. (Nasdaq: GIW), a Private-to-Public Equity company also known as a SPAC. The deal implies a pro forma equity value of approximately $666.1 million at $10.00 per share and hands WISeQey and SEALSQ an aggregate of 66,610,000 shares in a new British Virgin Islands holding company, Quantisimo Holding Corp., expected to list on the Nasdaq Capital Market under the symbol QSMO.

Context — why a quantum SPAC at $666 million matters now

The transaction follows a letter of intent the two sides announced on June 24, 2026, meaning the parties moved from non-binding talks to a signed merger in roughly three and a half months. That is the comparable the report itself supplies, and it frames the deal as a conversion of an earlier signal into a binding obligation rather than a fresh approach.

The structure is a double merger. A PubCo subsidiary merges into GigCapital8, which survives as a wholly owned subsidiary, and a second PubCo subsidiary then merges into Quantisimo, which also survives as a wholly owned subsidiary. Each GigCapital8 Class A ordinary share converts into one PubCo ordinary share, and every five GigCapital8 rights convert into one PubCo share.

What changed to trigger the signing is the contribution package. Before closing, WISeQey and SEALSQ will transfer their interests in Miraex SA, SEALCOIN AG, WeCan Group SA and WISeSat.Space Holdings Corp. (Nasdaq: SAIQ) into Quantisimo, alongside selected future quantum technologies and strategic investments.

That bundle is the substance of the pitch. Quantisimo is being developed as a pure-play sovereign quantum vertical platform under the phrase "Root to Qubit," which the company uses to describe connecting cryptographic roots of trust and post-quantum protection with quantum networking, photonic technologies, quantum sensing and quantum computing.

The macro backdrop is not cited in the report, and no index or rate level is given, so the relevant backdrop is deal-specific: a minimum cash condition, a sponsor lock-up and a shareholder vote stand between the announcement and the listing. For broader market context, readers can track live coverage at fazen.markets/en.

Data — what the numbers show

The headline figure is the $666.1 million pro forma equity value, struck at $10.00 per share. The 66,610,000 PubCo shares issued to WISeQey and SEALSQ divide evenly into that valuation, and the two are expected to hold a majority of PubCo's outstanding ordinary shares after closing.

Voting power is separated from economics. All Class F shares, including those issued to GigCapital8's sponsor for a portion of its GigCapital8 ordinary shares, carry in aggregate 49.999999% of PubCo's total voting power.

The cash test is a $15 million minimum, funded from GigCapital8's trust account after redemptions and any PIPE investment, plus a matching contribution from SEALSQ. SEALSQ receives additional PubCo ordinary shares at $10.00 per share for that contribution, and any PIPE is expected to price at not less than $10.00 per share.

Item	Detail
Pro forma equity value	~$666.1 million
Reference price	$10.00 per share
PubCo shares to WISeQey and SEALSQ	66,610,000
Minimum cash condition	$15 million
Class F voting power	49.999999%
Lock-up	six months

Before the June 24 letter of intent, the market had no signed agreement to price; after October 9, the deal carries a fixed share count and a fixed reference price. The report gives no comparable peer transaction, so no sector multiple can be derived from it.

The sponsor has agreed to vote its shares in favor of the transaction and not to redeem them, which removes a redemption overhang that typically sits on SPAC votes. WISeQey, SEALSQ, the sponsor and GigCapital8's directors and officers all accept six-month lock-ups.

Analysis — what it means for quantum and space tickers

Quantisimo's stated design is concentrated exposure to one theme rather than a diversified holding company. The company defines a pure-play quantum business as one whose primary operations, revenues and investment profile focus exclusively on quantum computing, networking, sensing or cybersecurity. If the listing completes, QSMO would sit alongside SEALSQ and WISeSat.Space as a third Nasdaq vehicle tied to the same WISeQey orbit, which concentrates single-sponsor exposure across three tickers for anyone holding the group.

The second-order effect runs through the contributed assets. Miraex SA, SEALCOIN AG and WeCan Group SA move from private subsidiaries into a listed structure, which gives public-market investors indirect access to photonics, decentralized physical infrastructure and Swiss digital trust businesses they could not previously buy directly. WISeSat.Space, already listed under SAIQ, becomes part of a larger platform.

The counter-argument is structural. A $15 million minimum cash condition is modest relative to a $666.1 million headline valuation, and the report does not disclose a PIPE size, a redemption estimate or a trust balance. The equity value figure is a pro forma construct at a reference price, not cash raised.

The principal risk the report flags is completion itself. Closing depends on GigCapital8 shareholder approval, an effective Form F-4 registration statement and Nasdaq listing approval, any of which can slip. Quantisimo is also described as pursuing an emerging market.

Positioning is straightforward: WISeQey and SEALSQ are long their own contributed assets and are expected to remain majority holders, the sponsor is locked in and barred from redeeming, and any new money arrives through a PIPE priced at or above $10.00.

Outlook — what to watch next

The completion target is the first quarter of 2027, subject to customary conditions. That date is the single hard catalyst the company gave, and it anchors everything else.

Three filings carry the next information. GigCapital8 will file a Current Report on Form 8-K with the merger agreement, PubCo intends to file a Form F-4 registration statement combining a GigCapital8 proxy statement and a PubCo prospectus, and both will file further documents with the SEC. The PIPE size and pricing, if one is raised, would surface in that chain.

The $10.00 per share reference price is the level to watch, because it sets the PIPE floor and the conversion economics for SEALSQ's cash contribution. A GigCapital8 shareholder vote is the binary event; the report gives no date for it. Quantum-sector readers tracking the wider theme can follow fazen.markets/en for related coverage.

Frequently Asked Questions

What does the Quantisimo and GigCapital8 deal mean for retail investors?

Retail investors cannot buy Quantisimo today because it is private. The path to exposure is through the listing: PubCo shares are expected on the Nasdaq Capital Market under QSMO after closing, targeted for the first quarter of 2027. Until then, the report identifies WISeQey and SEALSQ as the existing listed entities connected to the transaction, alongside WISeSat.Space under SAIQ.

What happens to GigCapital8 shares and rights in the merger?

Each GigCapital8 Class A ordinary share is exchanged for one PubCo ordinary share, and every five GigCapital8 rights convert into one PubCo ordinary share. GigCapital8's sponsor also receives Class F shares for a portion of its ordinary shares. The report states the sponsor will vote in favor of the deal and will not redeem its shares, and that all parties accept six-month lock-ups after closing.

Why is the Class F share structure important for Quantisimo?

Class F shares carry no separate economic terms in the report, but they control voting power. In aggregate they hold 49.999999% of PubCo's total voting power, while WISeQey and SEALSQ receive 66,610,000 ordinary and Class F shares combined and are expected to hold a majority of outstanding ordinary shares. That split lets the founders keep effective control despite a public float.

Bottom Line

The deal fixes Quantisimo's headline value at $666.1 million, but the $15 million cash floor and a pending shareholder vote mean completion, not valuation, is the real test.

Disclaimer: This article is for informational purposes only and does not constitute investment advice. CFD trading carries high risk of capital loss.