---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-075273"
form_type: "8-K/A"
ticker: "SBXD"
cik: "0002015947"
company_name: "SilverBox Corp IV"
filed_at: "2025-08-07T23:59:59+00:00"
generated_at: "2026-05-17T18:30:14.559082+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# SilverBox Corp IV agrees to de-SPAC merger with Parataxis Holdings; base valuation $100M plus financing

## Summary
- SilverBox Corp IV (SBXD) will merge with Parataxis Holdings LLC; Pubco will become publicly traded on NYSE/Nasdaq.
- Company holders receive Pubco Class A/C shares; base valuation of $100M plus gross proceeds from initial financing and any additional financing.
- Earnout of up to 7.5M Pubco Class A shares contingent on share price targets of $12.50 and $15.00 over 5 years.
- Edward Chin (Key Company Holder) to become CEO and Chairman; holds Pubco Class C shares with 80% voting power until sunset.
- Closing requires minimum $25M net cash; Company will use Preferred Equity proceeds to purchase Bitcoin via Galaxy Digital.

## SEC filing metadata
- accession: 0001104659-25-075273
- form_type: 8-K/A
- ticker: SBXD
- cik: 0002015947
- company_name: SilverBox Corp IV
- filed_at: 2025-08-07T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 1.01, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2015947/000110465925075273/0001104659-25-075273-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2015947/000110465925075273/tm2522703d4_8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-075273
- JSON: https://secwatch.observer/filing/0001104659-25-075273.json
- Plain text: https://secwatch.observer/filing/0001104659-25-075273.txt

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