Every 8-K that SilverBox Corp IV (SBXD) has filed with the SEC in the last 24 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 8-K covers material events a company has to report between its quarterly reports, so if you follow SBXD and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full SBXD filings page.
Effective September 28, 2026, SilverBox Corp IV's units, Class A ordinary shares and warrants are quoted and traded on the OTCID, operated by OTC Markets, under the new symbols SBXUF, SBXDF and SBXWF, respectively.
NYSE intends to file a Form 25 to remove the securities from its listing and registration. SilverBox Corp IV says it intends to remain a public reporting company.
SilverBox Corp IV received notice from NYSE Regulation on September 25, 2026, that staff had determined to commence proceedings to delist its units, Class A ordinary shares and warrants. Staff determined the company had fallen below the continued-listing standard requiring an acquisition company to maintain average aggregate global market capitalization attributable to its publicly-held shares of at least $40,000,000 over a consecutive 30 trading day period.
NYSE trading in the securities was suspended as of September 25, 2026. SilverBox has a right to review the determination by a Committee of the NYSE Board of Directors, while the SEC delisting application is pending completion of applicable procedures, including any company appeal. Effective September 28, 2026, the securities may be quoted and traded in the OTC market under SBXD.U, SBXD and SBXD.WS, respectively.
SilverBox Corp IV entered into a Second Amendment to its Business Combination Agreement with Parataxis Holdings entities, extending the contractual Outside Date for closing their proposed business combination from August 6, 2026 to December 31, 2026.
The amendment also permits SBXD and the Parataxis company, by written notice, to further extend the Outside Date if SBXD obtains an extension of its deadline to complete an initial business combination, for a period no longer than the relevant SPAC extension or a shorter period mutually agreed by the parties. Extensive risk disclosures describe volatility and regulatory uncertainty around Bitcoin-focused strategies, South Korean digital-asset markets, and potential dilution from warrants and a standby equity purchase agreement.
SilverBox Corp IV is furnishing an investor presentation outlining its proposed business combination with Parataxis Holdings to create PubCo, an institutional digital asset manager. PubCo’s model combines private investment funds, principal balance sheet investments and an actively managed Bitcoin- and Ethereum-focused digital asset treasury, targeting BTC-centric returns rather than passive price exposure.
The materials describe PubCo’s affiliation with Parataxis Capital Management, which manages over $100 million for institutional clients, and highlight early moves in South Korea through Parataxis Korea and Parataxis Ethereum as listed BTC and ETH treasury vehicles. An illustrative transaction summary shows Parataxis equity rollover, SBXD trust cash and preferred equity funding contributing to a pro forma equity value around $393 million at $10 per share with 39.3 million shares outstanding, assuming no redemptions.
The presentation emphasizes accelerating institutional adoption of digital assets, but also details extensive risks, including Bitcoin and ETH price volatility, regulatory changes, security and custody vulnerabilities, potential dilution from warrants, dual-class voting, equity line sales under a standby equity purchase agreement and the possibility that the business combination may not close or may face significant redemptions.
SilverBox Corp IV entered into a First Amendment to its Business Combination Agreement with Parataxis entities on May 1, 2026. The amendment extends the agreement’s “Outside Date” for closing the proposed business combination from May 6, 2026 to August 6, 2026, giving the parties more time to satisfy closing conditions and complete the transaction. The company notes that a Registration Statement on Form S-4 containing a proxy statement/prospectus has been filed, and reiterates that shareholders should rely on those SEC materials when evaluating the deal.
SilverBox Corp IV reports that Parataxis Holdings LLC has entered into a definitive agreement with Sinsiway Co. Ltd. in a transaction valued at up to KRW 35 billion. The deal is structured to give Parataxis Holdings a controlling interest in Sinsiway, subject to closing conditions. After closing, Sinsiway plans to change its name to Parataxis ETH, Inc. while remaining listed on the KOSDAQ. The parties describe the planned combination as creating South Korea’s first Ethereum-based treasury platform listed on the country’s public markets, anchored by U.S.-based institutional digital-asset investors. The 8-K also reminds SilverBox shareholders that a Registration Statement on Form S-4 for the broader business combination among SilverBox, Parataxis Holdings and a new holding company is on file with the SEC and will form the basis of the proxy and prospectus materials.
SilverBox Corp IV reported an amendment to previously disclosed Preferred Equity Subscription Agreements tied to its proposed business combination with Parataxis. Earlier, Parataxis agreed to sell an aggregate of 3,100,000 preferred equity units at $10.00 per unit for a total of $31,000,000 in a private placement.
Effective October 31, 2025, the parties removed restrictions that had barred pledging the Bitcoin purchased with those proceeds and now permit that Bitcoin to be used as collateral or other credit support to secure indebtedness or obligations under lending or other financing arrangements. The filing also notes that a Registration Statement on Form S-4 (No. 333-289994) including a preliminary proxy statement/prospectus has been filed for the proposed business combination.
SilverBox Corp IV reports that Parataxis Holdings Inc. and Parataxis Holdings LLC have filed a Form S-4 registration statement for their previously announced business combination with SilverBox. The S-4 includes a preliminary proxy statement for SilverBox shareholders and a prospectus for Pubco, which will be mailed in definitive form to shareholders as of a future record date to vote on the transaction. The communication stresses that it is not an offer or solicitation and that any securities offering will be made only by a prospectus meeting Securities Act requirements.
The filing outlines extensive forward-looking risk factors, including the possibility the deal may not close, high redemption levels, listing uncertainties for Pubco, costs of becoming public, and Pubco’s planned Bitcoin-focused strategy. It notes that Pubco’s results and stock price may be highly sensitive to Bitcoin prices, regulatory treatment of crypto assets, potential dilution from warrants and equity financing, and legal, regulatory and geopolitical risks, including those related to South Korea and a KOSDAQ-listed investment.
SilverBox Corp IV (NYSE:SBXD) filed an 8-K reporting a board transition effective June 25 2025.
Director Matthew Eilers resigned to avoid potential conflicts after joining an investment bank. The Board concurrently appointed Glenn Marino—a 30-year consumer-finance veteran and former Synchrony Financial CCO—as director and member of the Audit, Compensation, and Nominating & Governance committees.
- The Board designated Marino an “audit committee financial expert” under SEC rules.
- Standard indemnification executed; Marino is bound by the SPAC IPO letter to support the initial business combination.
- Eilers’ departure involved no disagreement regarding company policies.
No related-party transactions or family ties were disclosed.
SilverBox Corp IV (NYSE: SBXD) filed a Form 8-K on June 20, 2025 under Item 7.01 (Regulation FD Disclosure). The filing reiterates that SBXD and Parataxis Holdings LLC signed a non-binding letter of intent on June 9, 2025 regarding a potential business combination. The new disclosure attaches a press release (Exhibit 99.1) issued the same day by Parataxis Holdings announcing a definitive agreement to acquire a controlling interest in Bridge Biotherapeutics, Inc. (KOSDAQ: 288330). Parataxis intends to use this acquisition to establish an institutionally backed Bitcoin treasury company that would be listed on the South Korean public markets.
The 8-K expressly states that the information—including Exhibit 99.1—is being “furnished” rather than “filed”, meaning it is not subject to Section 18 liability and will not be incorporated by reference into SBXD’s Securities Act or Exchange Act filings. No financial statements, pro-forma data, or valuation terms are provided, and SBXD remains in the due-diligence stage: no definitive business-combination agreement has been executed yet.
SBXD advises shareholders that, if a definitive agreement is reached, a newly formed holding company (“PubCo”) together with SBXD and Parataxis Holdings will prepare a registration statement and proxy statement/prospectus, which will be mailed to SBXD shareholders and filed with the SEC. The company directs investors to review those future filings, along with SBXD’s Form 10-K for the year ended December 31, 2024, for detailed risk factors and ownership information.
The filing includes standard forward-looking-statement disclaimers highlighting risks such as potential termination of negotiations, regulatory approvals, listing uncertainties, and market demand for digital assets in South Korea. It also clarifies that the 8-K does not constitute an offer or solicitation related to any securities.
Key take-away for investors: The disclosure signals incremental progress toward a possible SPAC merger, but material deal terms, financial impacts, and closing conditions remain unknown. Until a binding agreement is signed and a registration statement is filed, SBXD’s transaction timeline and economics are speculative.