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425 ·Filed Oct 14, 2026

GIW

GigCapital8 Corp.
NEUTRAL
Impact 5/10
Horizonmonths Processed12d 9h ago SEC0001213900-26-109268
Rule 425 M&A communications
Actionable Insight • Neutral

Monitor the filing of the Form F-4 registration statement and the SPAC shareholder vote timeline. Key risk is the level of redemptions by GigCapital8 public shareholders, which directly impacts the cash available at closing and the post-deal float. The absence of a termination fee means either party can walk away without penalty if conditions are not met.

DirectionNeutral
Confidencehigh
Horizonmonths
Latest settled — T+5d ⚠ clustered
GIW ▼ -0.29% at T+5d
NEUTRAL call -0.29% · α vs SPY -0.75% · entry $10.20 → $10.17
Next anchor: T+20d in 16d
Latest observation: T+7 -0.51% FF3 residual α
Entry = T+0 close
Oct 14, 2026
via day close
T+1d
0.00%
call 0.00% · α -0.28%
$10.20
settled 11d ago
T+5d
-0.29%
call -0.29% · α -0.75%
$10.17
settled 5d ago
T+20d
Pending
in 16d
T+60d
Pending
in 3mo

Price Chart

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Executive Summary

SEALSQ Corp filed this Form 6-K/425 to provide a detailed description of the definitive business combination agreement between GigCapital8 Corp. (SPAC) and Quantisimo Corp., a pure-play sovereign quantum vertical platform formed by WISeQey and SEALSQ. The transaction implies a pro forma equity value for Quantisimo of approximately $666.1 million at $10.00 per share, with a minimum cash condition of $15 million. The deal is expected to close in Q1 2027, subject to shareholder and regulatory approvals, and will result in PubCo listing on Nasdaq under the symbol 'QSMO'.

Key Financial Metrics

Deal Value
$666.1M
Deal Type
merger

Key Facts

  • Definitive business combination agreement signed October 8, 2026 between GigCapital8 Corp. (GIW) and Quantisimo Corp.
  • WISeQey and SEALSQ will receive an aggregate of 66,610,000 PubCo shares, implying a pro forma equity value for Quantisimo of approximately $666.1 million at $10.00 per share.
  • Minimum cash condition of $15 million at closing, funded by SPAC trust cash and a matching cash contribution from SEALSQ.
  • PubCo's ordinary shares expected to list on Nasdaq Capital Market under symbol 'QSMO'.
  • Closing expected in Q1 2027, subject to GigCapital8 shareholder approval, regulatory approvals, and other customary conditions.
  • No termination fee, break-up fee, or similar fee is payable by any party upon termination of the Merger Agreement.
  • Sponsor (GigAcquisitions8 Corp.) has agreed to vote in favor and not redeem its shares; six-month lock-up agreements for Sponsor, directors, officers, and Company Shareholders.
  • PubCo Class F shares held by WISeQey, SEALSQ, and Sponsor will carry 49.999999% of total voting power.

Financial Impact

Pro forma equity value of Quantisimo approximately $666.1 million at $10.00 per share; minimum cash condition of $15 million at closing.

equity valuecash positiondilution

Risk Factors

  • Failure to obtain GigCapital8 shareholder approval or required regulatory approvals could terminate the deal.
  • High redemptions by SPAC public shareholders could reduce available cash below the $15 million minimum condition.
  • SEALSQ's obligation to fund the Company Cash Contribution is subject to 'commercially reasonable efforts', creating execution risk.
  • No PIPE Subscription Agreements have been entered into as of the filing date; failure to secure PIPE financing could impact the cash condition.
  • The dual-class structure (Class F shares holding 49.999999% voting power) may deter some public market investors.

Investment Themes

Traditional Finance

Documents Analyzed

This report is based on 4 SEC documents filed with EDGAR.

DocumentAccession Number
425 Filing (Primary)0001213900-26-109268
Document: 0001213900-26-109268-index-headers.html0001213900-26-109268
Document: 0001213900-26-109268-index.html0001213900-26-109268
Document: 0001213900-26-109268.txt0001213900-26-109268
7 reports for GIW
Performance horizon
0% Hit rate @ T+5 0 of 3 directional calls Went positive at some point 1 of 3 best @ T+60▲ +0.69%Jun 25, 2026
Filters
Rows
Reports for GIW — sortable, filterable
TypeNow
Oct 14, 2026
12d ago
425
NEUTRAL ★ 5/10
$10.20 $10.17▼ −0.29%▼ −0.75%$10.17 (−0.29%)
Oct 14, 2026
12d ago
425
NEUTRAL ★ 5/10
$10.20 $10.17▼ −0.29%▼ −0.75%$10.17 (−0.29%)
Oct 13, 2026
13d ago
425
NEUTRAL ★ 5/10
$10.18 $10.17▼ −0.10%▲ +1.05%$10.17 (−0.10%)
Oct 13, 2026
13d ago
8-K
NEUTRAL ★ 6/10
$10.18 $10.17▼ −0.10%▲ +1.05%$10.17 (−0.10%)
Oct 9, 2026
17d ago
425
BULLISH ★ 6/10
$10.20 $10.19▼ −0.10%▲ +1.87%$10.17 (−0.29%)
Oct 9, 2026
17d ago
8-K
BULLISH ★ 6/10
$10.20 $10.19▼ −0.10%▲ +1.87%$10.17 (−0.29%)
Jun 25, 2026
17w ago
425 / 8-K
BULLISH ★ 6/10
$10.08 $10.07▼ −0.10%▼ −1.66%$10.17 (+0.89%)
Showing 7 of 7

US Market Status

Market Closed — Opens Tue (< 1m)

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Report published Oct 14, 2026