Beneficial Ownership Report · SCHEDULE 13G
SILVERBOX CORP IV
SBXDFOTCEQUITYCurrent
Beneficial Ownership Report
Structured filing — SCHEDULE 13G
primary_doc.xml
Subject company
- Company
- SilverBox Corp IV
- Company CIK
- 0002015947
- Street
- 1250 South Capital of Texas Highway
- Street (continued)
- Building 2, Suite 285
- City
- Austin
- State / country code
- TX
- Postal code
- 78746
Statement details
- Security class
- Class A
- Event date
- 09/30/2026
- Rule designation
- Rule 13d-1(d)
Reporting person 1
- Name
- Calamos Market Neutral Income Fund, a series of Calamos Investment Trust
- Citizenship / organization
- MA
- Reporting person type
- IV
- Aggregate amount owned
- 500,000.00
- Percent of class
- 7.8
- Sole voting power
- 500,000.00
- Shared voting power
- 0.00
- Sole dispositive power
- 500,000.00
- Shared dispositive power
- 0.00
- Aggregate excludes certain shares
- N
Item 1
Issuer
SilverBox Corp IV
Principal executive office address
1250 South Capital of Texas Highway, Building 2, Suite 285, Austin, TX 78746
Item 2
Citizenship
Massachusetts, U.S.A.
Filing person
Calamos Market Neutral Income Fund, a series of Calamos Investment Trust
Principal business or residence address
2020 Calamos Ct Naperville, IL 60563
Item 3
Not applicable indication
N
Type of filing person
IV
Item 4
Percent of class
7.8%
Amount beneficially owned
500,000
Sole voting power
500,000
Shared voting power
0
Sole dispositive power
500,000
Shared dispositive power
0
Item 5
Not applicable indication
Y
Item 6
Not applicable indication
Y
Item 7
Not applicable indication
Y
Item 8
Not applicable indication
Y
Item 9
Not applicable indication
Y
Item 10
Not applicable indication
Y
Signature 1
- Reporting person
- Calamos Market Neutral Income Fund, a series of Calamos Investment Trust
- Signed
- /s/ Erik D. Ojala
- Title
- Erik D. Ojala, Senior Vice President, Secretary
- Date
- 10/07/2026
Company context
SilverBox Corp IV is a special purpose acquisition company (“SPAC”) sponsored by an affiliate of SilverBox Capital and formed as part of an institutional platform to sponsor a series of SPACs. SBXD completed its $200 million initial public offering in August 2024 and its stock currently trades on NYSE under the ticker “SBXD.” SilverBox Capital is a strategic investment and advisory firm that brings together capital, advice and operating expertise in a single, aligned platform. Learn more at www.sbcap.com.
Current securities
Recent company filings
- SCHEDULE 13G/A - filed by MIZUHO FINANCIAL GROUP INC regarding SilverBox Corp IVNov 12, 2026
- SCHEDULE 13G/A - filed by BERKLEY W R CORP regarding SilverBox Corp IVNov 9, 2026
- SCHEDULE 13G/A - filed by BARCLAYS PLC regarding SilverBox Corp IVNov 6, 2026
- 25-NSE - filed by NEW YORK STOCK EXCHANGE LLC regarding SilverBox Corp IVOct 13, 2026
- Other EventsSep 28, 2026