GigCapital8 Signs $666.1 Million Merger Deal to Take Quantisimo Public on Nasdaq

Key numbers

Deal value	$666M
Share of market cap	179.6%

Key highlights

• Pro forma equity value of approximately $666.1 million at $10.00 per share
• New entity expected to list on Nasdaq Capital Market under ticker QSMO in Q1 2027
• WISeKey and SEALSQ to receive 66.61 million shares and maintain majority ownership
• Minimum cash condition of $15 million supported by trust funds, PIPE, and SEALSQ matching
• Six-month customary lock-up agreements for sponsors and major company shareholders

What Is the Deal?

GigCapital8 Corp. (GIW), a special purpose acquisition company, has reached a definitive business combination agreement with Quantisimo Corp. The transaction values Quantisimo at an implied pro forma equity value of approximately $666.1 million. Following the merger, the combined company will operate as Quantisimo Holding Corp. and is expected to list its ordinary shares on the Nasdaq Capital Market under the ticker symbol QSMO. This deal formalizes the non-binding letter of intent signed in June 2026 and targets a completion date in the first quarter of 2027, subject to shareholder and regulatory approvals.

Deal Structure and Terms

• Issuance of 66.61 million shares to parent entities WISeKey and SEALSQ
• Closing conditional upon a $15 million minimum cash balance
• Funding sources include GIW trust funds, PIPE investments, and matching contributions
• Six-month post-closing lock-up periods for the sponsor and key shareholders
• GigCapital8 sponsor has committed to voting in favor and not redeeming shares

Strategic Rationale

Quantisimo is designed as a pure-play sovereign quantum vertical platform, operating under the vision of Root to Qubit. The merger seeks to consolidate high-tech interests in quantum sensing, hardware, machine-to-machine payment protocols, and secure satellite communications. By bringing together subsidiaries such as Miraex SA and WISeSat.Space, the entity aims to create a unified infrastructure for quantum cybersecurity and space IoT. The platform focuses exclusively on quantum-related revenues, positioning itself as a specialized sovereign technology provider rather than a peripheral segment of a larger conglomerate.

Financial Context

The transaction places a $666.1 million valuation on Quantisimo at $10.00 per share, which represents a step up from the $575 million figure estimated during the initial non-binding agreement phase. GigCapital8 currently maintains approximately $257.52 million in its trust account to support potential redemptions and closing costs. Market performance for GIW remains steady with the share price hovering near $10.17 and a neutral Relative Strength Index of 54.9. The $15 million minimum cash requirement provides a baseline for operational funding as the new entity transitions to a public listing.

Up 0.1% since our story on 9 Oct: $10.17 when we broke it → $10.18 at the close on 13 Oct. Daily closing prices. Source: Yahoo Finance.

Show the prices

14 Sep	$10.16
15 Sep	$10.16
16 Sep	$10.16
17 Sep	$10.16
18 Sep	$10.15
21 Sep	$10.16
22 Sep	$10.15
23 Sep	$10.15
24 Sep	$10.16
25 Sep	$10.16
28 Sep	$10.17
29 Sep	$10.17
30 Sep	$10.18
1 Oct	$10.18
2 Oct	$10.19
5 Oct	$10.18
6 Oct	$10.18
7 Oct	$10.17
8 Oct	$10.17
9 Oct	$10.20
12 Oct	$10.19
13 Oct	$10.18

GigCapital8 Corp. · financial snapshot

Share price	$10.17
Market cap	$371M
1-month price change	+0.00%
Sector	Financial ServicesShell Companies

Reference market data from a third-party provider, as of the story. Not a valuation or a recommendation.