Latest Period
Q1 2026
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)
20,233,279
Price
$10.70
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- Security type / class
- Equity / COMMON-STOCK
- Symbol
- SBXD on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 20,233,279
- Total 13F value
- $216,449,129
- Portfolio coverage rank
- 0%
- Share change
- +173,972
- Value change
- +$1,981,249
- Number of holders
- 45
- Shares outstanding
- 20,455,000
- SEC-reported price per share
- $10.70
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- SBXD - SILVERBOX CORP IV-A - COMMON-STOCK is tracked under CUSIP G81354105.
- 45 institutions reported positions in Q1 2026.
- 8 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 45 to 45 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $209,293,850 to $216,449,129.
Research use
- 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.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 45 institutions filings for Q1 2026.
Security key
G81354105
Latest holder period
Q1 2026
13F holders
45
13D/G owners
8
CIK / CUSIP context first
Open Q1 2026 holders
SBXD full holder history
SilverBox Corp IV SEC filings
SilverBox Corp IV company facts
SilverBox Corp IV insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP G81354105:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
8
Security
SBXD
| 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 Mar 2026, 45 institutional investors reported holding 20,233,279 shares of SILVERBOX CORP IV-A - COMMON-STOCK (SBXD). This represents 99% of the company’s total 20,455,000 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
91%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Linden Advisors LP | 9.8% | 2,000,000 | 0% | 0.12% | $21,400,000 |
| MIZUHO SECURITIES USA LLC | 8.8% | 1,796,947 | +9.2% | 0.45% | $19,173,424 |
| BERKLEY W R CORP | 7.4% | 1,514,573 | +25% | 0.87% | $16,205,931 |
| Polar Asset Management Partners Inc. | 7.4% | 1,508,005 | +9.3% | 0.38% | $16,135,654 |
| AQR Arbitrage LLC | 6.5% | 1,335,376 | -0.86% | 0.23% | $14,288,523 |
| WOLVERINE ASSET MANAGEMENT LLC | 4.9% | 993,817 | +2.2% | 0.17% | $10,633,842 |
| D. E. Shaw & Co., Inc. | 4.8% | 989,397 | 0% | 0.01% | $10,586,548 |
| MMCAP International Inc. SPC | 4.8% | 980,000 | 0% | 0.91% | $10,486,000 |
| Crossingbridge Advisors, LLC | 4.8% | 977,013 | +53% | 1.9% | $10,454,523 |
| PICTON MAHONEY ASSET MANAGEMENT | 4% | 824,899 | 0% | 0.09% | $8,826,419 |
| RiverPark Advisors, LLC | 3.3% | 678,613 | +15% | 2.6% | $7,261,159 |
| GOLDMAN SACHS GROUP INC | 3% | 606,166 | -0.01% | 0% | $6,485,976 |
| Magnetar Financial LLC | 2.5% | 520,823 | 0% | 0.06% | $5,578,014 |
| LMR Partners LLP | 2.4% | 500,000 | 0% | 0.05% | $5,350,000 |
| Calamos Advisors LLC | 2.4% | 500,000 | 0% | 0.02% | $5,350,000 |
| First Trust Capital Management L.P. | 2.2% | 445,168 | 0% | 0.25% | $4,763,298 |
| ARISTEIA CAPITAL, L.L.C. | 1.6% | 336,123 | 0% | 0.08% | $3,596,516 |
| Westchester Capital Management, LLC | 1.6% | 325,485 | 0% | 0.17% | $3,482,689 |
| RLH Capital LLC | 1.5% | 304,320 | 0% | 1.7% | $3,256,224 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 1.5% | 299,997 | 0% | 0.16% | $3,209,968 |
| Shaolin Capital Management LLC | 1.4% | 279,849 | +24% | 0.25% | $2,994,384 |
| Context Capital Management, LLC | 1.3% | 262,951 | 0% | 0.07% | $2,813,576 |
| MOORE CAPITAL MANAGEMENT, LP | 1.2% | 250,000 | 0% | 0.1% | $2,675,000 |
| Radcliffe Capital Management, L.P. | 1.1% | 227,454 | 0% | 0.18% | $2,433,758 |
| Wealthspring Capital LLC | 1% | 207,565 | -0.61% | 0.53% | $2,220,946 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
6
Latest
Q1 2026
Rows shown
1-6 of 6
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 20,233,279 | $216,449,129 | +$1,981,249 | $10.70 | 45 |
| 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 |