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SilverBox Corp IV, a Cayman Islands SPAC, reported net income of $1.7 million for the quarter and $3.0 million for the six months ended June 30, 2026, driven entirely by $3.8 million of interest on investments in its $217.1 million Trust Account, partially offset by $0.8 million of general and administrative expenses.
Cash outside the Trust was only $15,104 with a working capital deficit of $497,133, and management disclosed that liquidity constraints and the requirement to liquidate if no business combination is completed by April 15, 2027 raise substantial doubt about the company’s ability to continue as a going concern. The company has a Business Combination Agreement with Parataxis Holdings LLC and, on August 11, 2026, shareholders approved extending the combination deadline and removing the $5,000,001 net tangible asset redemption limitation, leading to redemptions of about 19.0 million Class A shares for roughly $206.6 million, leaving approximately $10.5 million in the Trust Account.
AQR Capital Management LLC, AQR Capital Management Holdings, LLC, and AQR Arbitrage, LLC report beneficial ownership of Class A ordinary shares of SilverBox Corp IV. The group reports 1,012,401 Class A shares, representing 4.95% of the class.
The AQR entities report no sole voting or dispositive power, and shared voting and shared dispositive power over 1,012,401 shares. The filing notes ownership of 5 percent or less of the class, with AQR Capital Management, LLC identified as a wholly owned subsidiary of AQR Capital Management Holdings, LLC and AQR Arbitrage, LLC deemed controlled by AQR Capital Management, LLC.
W. R. Berkley Corporation, through subsidiary Berkley Insurance Company, reports beneficial ownership of Class A Ordinary Shares of SilverBox Corp IV. 1,923,442 shares are beneficially owned, representing 9.4% of the class. The filing states shared voting power and shared dispositive power over all 1,923,442 shares, with no sole voting or dispositive power reported.
SilverBox Corp IV entered into a Second Amendment to its Business Combination Agreement with Parataxis Holdings entities and related parties. The amendment extends the Outside Date for closing the proposed business combination to December 31, 2026, from August 6, 2026, with a mechanism for further extension if SilverBox’s SPAC deadline is formally extended and both sides agree in writing.
The combination would result in Parataxis Holdings Inc. becoming the publicly listed company, with a Registration Statement on Form S-4 (No. 333-289994) on file that includes a proxy statement/prospectus. Extensive forward-looking disclosures highlight risks tied to completion of the transactions, Bitcoin price volatility, digital asset demand in South Korea, potential listing issues, shareholder redemptions, and future dilution from warrants and a standby equity purchase agreement.
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 calling an extraordinary general meeting on August 11, 2026 for shareholders to vote on three proposals. The first would amend its charter to extend the deadline to complete a business combination from August 19, 2026 to December 19, 2026. The second would remove the $5,000,001 net tangible asset “Redemption Limitation,” allowing redemptions even if trust assets fall below that level. The third would permit adjournment if more time is needed to secure votes.
The company is pursuing a proposed business combination with Parataxis Holdings Inc. and cites ongoing registration and proxy work as the reason more time is needed. As of June 30, 2026, the trust account held $217,134,228, implying an estimated redemption price of about $10.85 per public share at the meeting. Shareholders may redeem regardless of how they vote, and will retain redemption and voting rights on a future merger if they do not redeem now.
If the extension and redemption limitation amendments are not approved and no business combination closes by August 19, 2026, the company will liquidate the trust, returning roughly $10.05 per share to public shareholders and winding up, with warrants expiring worthless. There are 25,455,000 ordinary shares outstanding, including 5,000,000 founder shares; the sponsor and insiders, who hold all founder shares, intend to vote in favor. The extension and redemption limitation amendments each require approval by at least two-thirds of votes cast; the adjournment proposal requires a simple majority.
SilverBox Corp IV asks shareholders to approve amendments to its articles to extend the deadline to complete an initial business combination from August 19, 2026 to December 19, 2026 and to remove a <$5,000,001> net tangible asset redemption limit. The amendments would permit public shareholders to elect cash redemption from the trust account in connection with the Extension and would allow the company to pay those redemptions even if they would reduce net tangible assets below $5,000,001. The company completed its IPO on August 19, 2024, raising gross proceeds of $200,000,000, and placed $201,000,000 in the Trust Account. On the record date there were 25,455,000 ordinary shares outstanding (including 20,000,000 public shares and 5,000,000 founder shares); Sponsor holds 5,000,000 founder shares (20.0%). If the amendments are not approved and a business combination is not completed by August 19, 2026, the company will wind up and redeem public shares for the pro rata amount in the Trust Account.
SilverBox Corp IV, a SPAC, reported net income of $1,374,660 for the quarter ended March 31, 2026, driven by $1,870,025 of interest on its Trust Account and offset by $495,365 of general and administrative costs.
Cash outside the trust was only $2,372 with a working capital deficit of $342,040, while $215,217,195 remained invested in the Trust Account. The company has a signed Business Combination Agreement with Parataxis and must close a transaction by August 19, 2026 or liquidate, leading management to state that there is substantial doubt about its ability to continue as a going concern.
Barclays PLC reported beneficial ownership of 1,431,850 shares of SILVERBOX CORP IV-A, representing 7.00% of the class as of 03/31/2026. The filing states Barclays has sole voting and sole dispositive power over these shares.
The Schedule 13G lists Barclays Bank PLC and Barclays Capital Inc. as subsidiaries associated with the reported holdings and is signed by a Barclays director on 05/14/2026.
SilverBox Corp IV furnished an investor presentation relating to the proposed business combination among SilverBox Corp IV, Parataxis Holdings and Parataxis Holdings Inc., and filed the presentation as Exhibit 99.1 to this Form 8-K.
The filing states the Parties have submitted a Registration Statement on Form S-4 (File No. 333-289994) that includes a preliminary proxy statement/prospectus for the Transactions. The presentation is furnished for Regulation FD purposes and will not be deemed "filed" under the Exchange Act.