secwatch.observer — SEC 8-K summary ====================================== Issuer: SilverBox Corp IV (SBXD) CIK: 0002015947 Form: 8-K Filed at: 2025-11-06T23:59:59+00:00 Accession: 0001104659-25-107351 Event type: other_material Sentiment: neutral Materiality: 0.60 Item codes: 1.01 LLM model: deepseek-v4-flash:cloud@v2 SilverBox Corp IV amends Preferred Equity Subscription Agreements to allow Bitcoin collateralization -------------------------------------------------------------------------------- - Amendment removes prohibition on pledging Bitcoin purchased with $31M preferred equity proceeds. - Permits Company to use Bitcoin as collateral or credit support for lending or other financing arrangements. - Original agreements: 3,100,000 preferred units at $10/unit for aggregate $31,000,000, entered Aug 6, 2025. - Amendment date: October 31, 2025; parties: Pubco, Company, and Preferred Equity Investors. - Business combination with Parataxis Holdings still pending; this is a related financing term change. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/2015947/000110465925107351/0001104659-25-107351-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/2015947/000110465925107351/tm2524487d10_8k.htm HTML page: https://secwatch.observer/filing/0001104659-25-107351 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer