Beneficial Ownership Report · SCHEDULE 13G/A
Black Hawk Acquisition Corporation
BKHANASDAQEQUITYCurrent
Beneficial Ownership Report
Structured filing — SCHEDULE 13G/A
primary_doc.xml
Amendment · This filing reports the amendment as submitted.
Subject company
- Company
- Black Hawk Acquisition Corporation
- Company CIK
- 0002000775
- Street
- 4125 Blackhawk Plaza Circle, Suite 166
- City
- Danville
- State / country code
- CA
- Postal code
- 94506
Statement details
- Amendment number
- 2
- Security class
- Ordinary Shares, par value $0.0001 per share
- Event date
- 09/30/2026
- Rule designation
- Rule 13d-1(b)
Reporting person 1
- Name
- W. R. Berkley Corporation
- Citizenship / organization
- DE
- Reporting person type
- CO
- Aggregate amount owned
- 322,086.00
- Percent of class
- 7.8
- Sole voting power
- 0.00
- Shared voting power
- 322,086.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 322,086.00
- Aggregate excludes certain shares
- N
Reporting person 2
- Name
- Berkley Insurance Company
- Citizenship / organization
- DE
- Reporting person type
- CO · IC
- Aggregate amount owned
- 322,086.00
- Percent of class
- 7.8
- Sole voting power
- 0.00
- Shared voting power
- 322,086.00
- Sole dispositive power
- 0.00
- Shared dispositive power
- 322,086.00
- Aggregate excludes certain shares
- N
Item 1
Issuer
Black Hawk Acquisition Corporation
Principal executive office address
4125 Blackhawk Plaza Circle, Suite 166, Danville, California, 94506
Item 2
Citizenship
US
Filing person
W. R. Berkley Corporation
Principal business or residence address
475 Steamboat Road Greenwich, CT 06830
Item 3
Not applicable indication
N
Type of filing person
IC · HC
Item 4
Percent of class
7.8
Amount beneficially owned
322,086
Sole voting power
0
Shared voting power
322,086
Sole dispositive power
0
Shared dispositive power
322,086
Item 5
Not applicable indication
Y
Ownership of 5% or less
N
Item 6
Not applicable indication
Y
Item 7
Not applicable indication
N
Subsidiaries
See Exhibit 99.1
Item 8
Not applicable indication
Y
Item 9
Not applicable indication
Y
Item 10
Not applicable indication
N
Certifications
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
Signature 1
- Reporting person
- W. R. Berkley Corporation
- Signed
- /s/ Richard M. Baio
- Title
- Richard M. Baio/Executive Vice President and Chief Financial Officer
- Date
- 11/09/2026
Signature 2
- Reporting person
- Berkley Insurance Company
- Signed
- /s/ Richard M. Baio
- Title
- Richard M. Baio/Executive Vice President and Treasurer
- Date
- 11/09/2026
Filed exhibits
Company context
Black Hawk Acquisition Corporation is a blank check company formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization, or similar business combination with one or more businesses.
Current securities
Recent company filings
- SCHEDULE 13G/A - filed by MIZUHO FINANCIAL GROUP INC regarding Black Hawk Acquisition CorpNov 12, 2026
- SCHEDULE 13G/A - filed by WOLVERINE ASSET MANAGEMENT LLC regarding Black Hawk Acquisition CorpNov 5, 2026
- Other EventsOct 23, 2026
- Submission of Matters to a Vote of Security HoldersOct 13, 2026
- SCHEDULE 13G/A - filed by WOLVERINE ASSET MANAGEMENT LLC regarding Black Hawk Acquisition CorpOct 7, 2026