SilverBox Corp IV shareholders are due to vote Tuesday on two amendments that would extend the SPAC's business-combination deadline from August 19 to December 19 and remove a $5,000,001 net-tangible-assets redemption limit. The measures could keep the vehicle from liquidating, but they would not protect the $217,134,228 held in trust as of June 30 because investors can still redeem their shares whether or not they support the proposals. SilverBox said those redemptions would be worth about $10.85 per public share at the extension meeting and warned the remaining trust balance could shrink to only a small fraction of the June amount. That matters because the proposed merger with Parataxis Holdings, a Bitcoin-focused transaction, requires the combined company to receive at least $25 million in net cash and equivalents after redemptions and transaction expenses, though that threshold may be waived in some cases. Separately, Parataxis raised $31 million in preferred equity and used about $30.8 million to buy roughly 263.78 Bitcoin in August 2025, with that Bitcoin kept outside SilverBox's trust. Another uncertainty is timing: a May filing moved the merger agreement's outside date to August 6, after which either side could conditionally terminate by written notice, and SilverBox's SEC (U.S. securities regulator) filings through August 9 showed no later amendment, waiver, or termination disclosure. If shareholders reject the amendments and no business combination closes by August 19, SilverBox would have to wind up, redeem public shares within 10 business days, and its warrants would expire worthless.