---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-074831"
form_type: "8-K"
ticker: "SBXD"
cik: "0002015947"
company_name: "SilverBox Corp IV"
filed_at: "2025-08-07T23:59:59+00:00"
generated_at: "2026-05-17T18:30:14.462880+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# SilverBox Corp IV signs definitive merger with Parataxis Holdings; Edward Chin gets 80% voting power

## Summary
- Base enterprise value of $100M; exchange ratio derived from $10 per unit, with additional adjustment for Bitcoin price appreciation.
- Key holder Edward Chin receives Pubco Class C shares with 80% voting power until his ownership falls below 25%.
- Up to 7.5M earnout shares vest upon Pubco stock reaching $12.50 or $15.00 VWAP over 20 days in 30-day period within 5 years.
- Company will use net proceeds from Preferred Equity Investment to purchase Bitcoin, held at Anchorage Digital custodian.
- Closing conditions include minimum $25M net cash, Nasdaq listing, shareholder approval, and no material adverse change.

## SEC filing metadata
- accession: 0001104659-25-074831
- form_type: 8-K
- 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: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 1.01, 3.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2015947/000110465925074831/0001104659-25-074831-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2015947/000110465925074831/tm2522703d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-074831
- JSON: https://secwatch.observer/filing/0001104659-25-074831.json
- Plain text: https://secwatch.observer/filing/0001104659-25-074831.txt

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