# Parataxis Holdings Inc. (PRTX) — merger/spac_merger [pending]
Source: SEC API (secapi.ai) · situation sit_ebcdcf462dd88094ca12 · retrieved 2026-08-11T15:49:12.837Z

## Overview
Parataxis Holdings Inc. is a Delaware corporation that will become the publicly listed company upon completion of a proposed business combination with SilverBox Corp IV, a SPAC, and will operate a digital assets business focused on Bitcoin and cryptocurrency investments with operations in South Korea.

SilverBox Corp IV (SBXD), a Cayman Islands exempted company, and Parataxis Holdings Inc. (Pubco), a Delaware corporation, along with their respective merger subsidiaries and the Company (Parataxis Holdings LLC), entered into a Second Amendment to their Business Combination Agreement on August 4, 2026. The amendment extends the Outside Date—the deadline by which closing conditions must be satisfied—from August 6, 2026 to December 31, 2026. The parties also agreed that if SBXD obtains an extension of its initial business combination deadline, both SBXD and the Company may further extend the Outside Date by written notice for a period equal to the shorter of (i) the period ending on the last day of SBXD's extension or (ii) such period as mutually agreed by the parties.

## Terms
- Counterparty: SilverBox Corp IV · Consideration: mixed · Price/share: $10

## Key dates
- Announced 2026-02-04 · Expected close 2026-12-31

## Timeline
- 2026-02-04 · 425 (0001104659-26-009885): 425 - Parataxis Holdings Inc. — *Parataxis Holdings is an institutional digital asset management platform affiliated with Parataxis Capital Management (PCM), a New York-based multi-strategy investment firm founded in 2019 that manages capital on behalf of US public pensions, family offices, and other qualified investors with $100 million+ in AUM, and is positioned to capitalize on the ongoing institutionalization of digital asse…* Parataxis Holdings LLC, an institutional digital asset management platform, is combining with SilverBox Corp IV (SBXD), a special purpose acquisition company, in a business combination transaction. The transaction is expected to result in a publicly listed company (PubCo) with approximately $240 million in pro forma capital at closing (assuming no redemptions from SBXD's trust account). Parataxis Holdings has deployed capital into digital asset platforms in South Korea, including investments in Parataxis Korea (BTC-focused, launched mid-2024) and Parataxis Ethereum (ETH-focused, launched January 2026). The combined entity will operate as an institutional digital asset management platform combining fee-based asset management activities, principal capital deployment, and Bitcoin treasury and yield strategies.
  https://www.sec.gov/Archives/edgar/data/2079180/0001104659-26-009885.txt
- 2026-08-05 · 425 (0001104659-26-090713): 425 - Parataxis Holdings Inc. — *Parataxis Holdings Inc. is a Delaware corporation that will become the publicly listed company upon completion of a proposed business combination with SilverBox Corp IV, a SPAC, and will operate a digital assets business focused on Bitcoin and cryptocurrency investments with operations in South Korea.* SilverBox Corp IV (SBXD), a Cayman Islands exempted company, and Parataxis Holdings Inc. (Pubco), a Delaware corporation, along with their respective merger subsidiaries and the Company (Parataxis Holdings LLC), entered into a Second Amendment to their Business Combination Agreement on August 4, 2026. The amendment extends the Outside Date—the deadline by which closing conditions must be satisfied—from August 6, 2026 to December 31, 2026. The parties also agreed that if SBXD obtains an extension of its initial business combination deadline, both SBXD and the Company may further extend the Outside Date by written notice for a period equal to the shorter of (i) the period ending on the last day of SBXD's extension or (ii) such period as mutually agreed by the parties.
  https://www.sec.gov/Archives/edgar/data/2079180/0001104659-26-090713.txt

## Citations
- 0001104659-26-009885 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000110465926009885
- 0001104659-26-090713 — https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&type=&dateb=&owner=include&count=40&search_text=000110465926090713