Latest Period
Q1 2026
Security Snapshot
SILVERBOX CORP IV - Class A Ordinary Shares, par value $0.0001 per share (SBXDU) Institutional Ownership
CUSIP: G81354113
13F Institutional Holders and Ownership History from Q3 2024 to Q1 2026
Institutions Reporting
3
Shares (Excl. Options)
44,167
Price
$10.50
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- Security type / class
- Equity / Class A Ordinary Shares, par value $0.0001 per share
- Symbol
- SBXDU
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 44,167
- Total 13F value
- $131,949
- Portfolio coverage rank
- 0%
- Share change
- +35,098
- Value change
- +$35,232
- Number of holders
- 3
- Shares outstanding
- 20,467,203
- SEC-reported price per share
- $10.50
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
- SBXDU - SILVERBOX CORP IV - Class A Ordinary Shares, par value $0.0001 per share is tracked under CUSIP G81354113.
- 3 institutions reported positions in Q1 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 3 to 3 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $95,705 to $131,949.
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 3 institutions filings for Q1 2026.
Security key
G81354113
Latest holder period
Q1 2026
13F holders
3
13D/G owners
2
CIK / CUSIP context first
Open Q1 2026 holders
SBXDU 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 G81354113:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
SBXDU
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BERKLEY W R CORP | 7.4% | $15,903,016 | 1,514,573 | W. R. Berkley Corporation | 31 Mar 2026 | |||
| Polar Asset Management Partners Inc. | 7.2% | $16,894,496 | 1,480,000 | Polar Asset Management Partners Inc. | 30 Jun 2025 |
As of 31 Mar 2026, 3 institutional investors reported holding 44,167 shares of SILVERBOX CORP IV - Class A Ordinary Shares, par value $0.0001 per share (SBXDU). This represents 0.22% of the company’s total 20,467,203 outstanding shares.
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
7
Latest
Q1 2026
Rows shown
1-7 of 7
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 44,167 | $131,949 | +$35,232 | $10.50 | 3 |
| 2025 Q4 | 9,069 | $95,705 | -$29,807 | $10.53 | 3 |
| 2025 Q3 | 43,969 | $126,380 | +$30,370 | $10.58 | 4 |
| 2025 Q2 | 2,427 | $27,499 | -$6,910,655 | $11.33 | 3 |
| 2025 Q1 | 672,697 | $6,918,724 | -$48,535,592 | $10.36 | 5 |
| 2024 Q4 | 5,390,050 | $54,636,407 | -$130,213,735 | $10.14 | 10 |
| 2024 Q3 | 18,370,442 | $184,255,533 | +$184,255,533 | $10.03 | 28 |