Latest Period
Q4 2025
Security Snapshot
SILVERBOX CORP IV-A - COMMON-STOCK (SBXD) Institutional Ownership
CUSIP: G81354105
13F Institutional Holders and Ownership History from Q4 2024 to Q1 2026
Institutions Reporting
45
Shares (Excl. Options)
19,793,495
Price
$10.58
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- Type / Class
- Equity / COMMON-STOCK
- Symbol
- SBXD on NYSE
- Shares outstanding
- 20,455,000
- Price per share
- $10.70
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 19,793,495
- Total reported value
- $209,293,850
- % of total 13F portfolios
- 0%
- Share change
- +335,531
- Value change
- +$3,800,741
- Number of holders
- 45
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- SBXD - SILVERBOX CORP IV-A - COMMON-STOCK is tracked under CUSIP G81354105.
- 45 institutions reported positions in Q4 2025.
- 8 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 45 to 22 between Q4 2025 and Q1 2026.
- Reported value moved from $209,293,850 to $89,236,375.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 45 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP G81354105?
CUSIP G81354105 identifies SBXD - SILVERBOX CORP IV-A - COMMON-STOCK in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G81354105:
Significant Owners of SILVERBOX CORP IV-A - COMMON-STOCK (SBXD) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| SilverBox Sponsor IV LLC | 21% | $56,131,950 | 5,455,000 | SilverBox Sponsor IV LLC | 31 Dec 2024 | |||
| MIZUHO FINANCIAL GROUP INC | 8% | $17,411,220 | 1,645,673 | Mizuho Financial Group, Inc. | 31 Dec 2025 | |||
| BARCLAYS PLC | 7% | +45% | $15,320,795 | +$4,931,876 | 1,431,850 | +47% | Barclays PLC | 31 Mar 2026 |
| AQR CAPITAL MANAGEMENT LLC | 6.6% | -13% | $14,547,622 | -$2,299,946 | 1,347,002 | -14% | AQR Capital Management, LLC | 30 Jun 2025 |
| BERKLEY W R CORP | 5.9% | $12,819,511 | 1,211,674 | W. R. Berkley Corporation | 31 Dec 2025 | |||
| GOLDMAN SACHS GROUP INC | 3.2% | -59% | $6,847,610 | -$9,976,936 | 654,022 | -59% | THE GOLDMAN SACHS GROUP, INC. | 30 Sep 2025 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC | 1.4% | -75% | $2,931,600 | -$9,933,936 | 280,000 | -77% | HIGHBRIDGE CAPITAL MANAGEMENT LLC | 30 Sep 2025 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 0.5% | -92% | $1,080,000 | -$18,360,000 | 100,000 | -94% | Healthcare of Ontario Pension Plan Trust Fund | 30 Jun 2025 |
As of 31 Dec 2025, 45 institutional investors reported holding 19,793,495 shares of SILVERBOX CORP IV-A - COMMON-STOCK (SBXD). This represents 97% of the company’s total 20,455,000 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of SILVERBOX CORP IV-A - COMMON-STOCK (SBXD) together control 88% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Linden Advisors LP | 9.8% | 2,000,000 | 0% | 0.13% | $21,160,000 |
| MIZUHO SECURITIES USA LLC | 8% | 1,645,673 | +461% | 0.29% | $17,296,311 |
| Polar Asset Management Partners Inc. | 6.7% | 1,380,000 | -6.8% | 0.29% | $14,600,400 |
| AQR Arbitrage LLC | 6.6% | 1,347,002 | 0% | 0.3% | $14,251,281 |
| BERKLEY W R CORP | 5.9% | 1,211,674 | +608% | 0.72% | $12,819,511 |
| D. E. Shaw & Co., Inc. | 4.8% | 989,397 | 0% | 0.01% | $10,467,820 |
| MMCAP International Inc. SPC | 4.8% | 980,000 | 0% | 1% | $10,368,400 |
| WOLVERINE ASSET MANAGEMENT LLC | 4.8% | 972,109 | +45% | 0.15% | $10,284,913 |
| PICTON MAHONEY ASSET MANAGEMENT | 4% | 824,899 | 0% | 0.1% | $8,727,431 |
| Governors Lane LP | 3.7% | 753,177 | 0% | 0.74% | $7,968,613 |
| Crossingbridge Advisors, LLC | 3.1% | 637,732 | 2% | $6,741,327 | |
| GOLDMAN SACHS GROUP INC | 3% | 606,254 | 0% | 0% | $6,414,167 |
| RiverPark Advisors, LLC | 2.9% | 587,732 | 1.8% | $6,218,205 | |
| Magnetar Financial LLC | 2.5% | 520,823 | 0% | 0.05% | $5,510,307 |
| LMR Partners LLP | 2.4% | 500,000 | 0% | 0.05% | $5,290,000 |
| Calamos Advisors LLC | 2.4% | 500,000 | 0% | 0.02% | $5,290,000 |
| First Trust Capital Management L.P. | 2.2% | 445,168 | 0% | 0.29% | $4,709,877 |
| ARISTEIA CAPITAL, L.L.C. | 1.6% | 336,123 | 0.1% | $3,556,181 | |
| Westchester Capital Management, LLC | 1.6% | 325,485 | 0% | 0.16% | $3,443,631 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 1.5% | 299,997 | 0% | 0.15% | $3,173,968 |
| Context Capital Management, LLC | 1.3% | 262,951 | 0% | 0.07% | $2,782,022 |
| MOORE CAPITAL MANAGEMENT, LP | 1.2% | 250,000 | 0% | 0.05% | $2,645,000 |
| Radcliffe Capital Management, L.P. | 1.1% | 227,454 | +28% | 0.13% | $2,406,463 |
| Shaolin Capital Management LLC | 1.1% | 225,000 | +14% | 0.09% | $2,380,500 |
| Wealthspring Capital LLC | 1% | 208,849 | -1.1% | 0.52% | $2,209,622 |
Institutional Holders of SILVERBOX CORP IV-A - COMMON-STOCK (SBXD) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 8,344,285 | $89,236,375 | +$6,184,071 | $10.70 | 22 |
| 2025 Q4 | 19,793,495 | $209,293,850 | +$3,800,741 | $10.58 | 45 |
| 2025 Q3 | 19,267,922 | $201,730,829 | -$2,831,028 | $10.47 | 50 |
| 2025 Q2 | 19,454,713 | $212,900,468 | +$5,989,470 | $10.96 | 49 |
| 2025 Q1 | 19,098,220 | $194,355,552 | +$44,686,640 | $10.18 | 35 |
| 2024 Q4 | 14,708,773 | $148,522,320 | +$146,274,646 | $10.09 | 25 |