---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-419728"
form_type: "8-K"
ticker: "GIW"
cik: "0002080019"
company_name: "GigCapital8 Corp."
filed_at: "2026-10-13T12:00:52+00:00"
generated_at: "2026-10-13T12:05:12.820692+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# GigCapital8 to merge with Quantisimo; PubCo to list on Nasdaq with 66.6M shares to target holders

## Summary
- Two-step merger: SPAC Merger Sub merges into GigCapital8, then Target Merger Sub merges into Quantisimo; PubCo becomes listed parent of both (GigCapital8 trades as GIW).
- Company shareholders WISeQey and SealSQ receive 66,610,000 PubCo shares; Sponsor gets 3,035,083 ordinary shares plus 3,035,084 Class F shares carrying 49.999999% of total votes.
- WISeQey and SealSQ will contribute stakes in Miraex SA, SEALCOIN AG, WeCan Group SA (Switzerland) and WISeSat.Space Holdings Corp (BVI) into Quantisimo pre-close.
- Minimum cash at closing of $15,000,000; PIPE priced at no less than $10.00/share; SPAC expense cap $5M (up to $7.5M); HSR filing due within 10 business days.
- Outside date March 31, 2027 with no termination fee; 6-month lock-ups for >1% holders, Sponsor and D&O; PubCo board of 7 (4 Quantisimo, 3 GigCapital8).

## SEC filing metadata
- accession: 0001193125-26-419728
- form_type: 8-K
- ticker: GIW
- cik: 0002080019
- company_name: GigCapital8 Corp.
- filed_at: 2026-10-13T12:00:52+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2080019/000119312526419728/0001193125-26-419728-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2080019/000119312526419728/d86532d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-419728
- JSON: https://secwatch.observer/filing/0001193125-26-419728.json
- Plain text: https://secwatch.observer/filing/0001193125-26-419728.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.