SilverBox Corp IV (SBXD)
Pursues a business combination and proposed Parataxis Holdings transaction.
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Formed to take a target public through a business combination, the Cayman Islands SPAC has no current operating product business. It is sponsored by SilverBox Sponsor IV LLC and has a proposed combination with Parataxis Holdings, whose closing remains subject to the transaction timetable and combination deadline.
Formed to identify and complete an initial business combination, this Cayman Islands SPAC has no operating product business before a deal closes. Its Class A ordinary shares trade on the New York Stock Exchange under SBXD.
SilverBox Sponsor IV LLC sponsors the vehicle. The pre-combination model centers on searching for an acquisition while trust-account cash and transaction financing support the contemplated deal.
An agreement with Parataxis Holdings names it as the proposed operating target, but Parataxis is not SBXD's current business. Completion remains subject to the transaction timetable and the deadline to consummate a qualifying business combination, including any shareholder-approved extension.
Company facts
No analyst consensus on record.
EPSReportedEstimate
RevenueReportedEstimate
Balance sheet, Jun 30, 2026Cash & short-term investments $15.1K · Total debt $0 · Total assets $217.2M · Shareholders' equity $203.5M
- Revenue
- $0
- Operating income
- −$262.0K
- Net income
- $1.7M
No dividends on record.
| Institutions45 holders · as of Mar 31, 2026 · largest filers plus last quarter's tail | ≈ 315.05% | 20.23M shares | |
| Adds to | 315.05% |
6.42M company shares as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing
Two share counts disagree (6.42M in the company's Sep 3, 2026 report, 20.46M elsewhere); stakes use the report.
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
These groups come from separate filings that can overlap, so they add to 315.05%; nothing is left for Other.
This company has 2 share classes; every stake here is a share of the whole company.
Top shareholders13F · 13D/G · Form 4
| Holder | Stake | Shares | Evidence |
|---|---|---|---|
Linden Advisors LPInstitution | 31.14% | 2.00M A | 13Fas of Mar 31, 2026 |
Mizuho Securities USA LLCInstitution | 27.98% | 1.80M A | 13Fas of Mar 31, 2026 |
Berkley W R CorpInstitution | 23.58% | 1.51M A | 13Fas of Mar 31, 2026 |
Polar Asset Management Partners Inc.Institution | 23.48% | 1.51M A | 13Fas of Mar 31, 2026 |
AQR Arbitrage LLCInstitution | 20.79% | 1.34M A | 13Fas of Mar 31, 2026 |
| See all 25 → | |||
13F — a manager's quarterly holdings
Insider tradesForm 4
Nothing filed in the last 12 months.
Not reported.