SEC ownership of Black Hawk Acquisition Corp

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002000775.

Comparable stake leader

WOLVERINE ASSET MANAGEMENT LLC

Disclosed value leader

MIZUHO FINANCIAL GROUP INC

Comparable rows

19/39

Latest evidence

31 Mar 2026

Top shareholders Insider holders Latest transactions

Public ticker: BKHA, BKHAR, BKHAU on Nasdaq
Parsed ownership sources: 13F, 13D/G, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder: WOLVERINE ASSET MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
Comparable ownership rows: 19 of 39
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder: WOLVERINE ASSET MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date: 31 Mar 2026
Freshness: Most recent filing date in this holder set
Issuer CIK: 0002000775
Issuer location: Danville, CA

Ownership snapshot

Top shareholders of Black Hawk Acquisition Corp (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

WOLVERINE ASSET MANAGEMEN...

Disclosed value leader

MIZUHO FINANCIAL GROUP INC

Comparable rows

19/39

Latest evidence

31 Mar 2026

13F 13D/G 3/4/5 Lead comparable stake: 8.6% 20 rows are not safely comparable across share classes. 13D/G row: WOLVERINE ASSET MANAGEMENT LLC Showing 1-8 of 39 holder rows.

Quick read

WOLVERINE ASSET MANAGEMENT LLC leads the comparable SEC ownership view at 8.6%.

19 of 39 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens WOLVERINE ASSET MANAGEMENT LLC's linked filing trail.

Comparable ownership Top 5

WOLVERINE ASSET MANAGEMENT LLC 8.6%

MIZUHO FINANCIAL GROUP INC 8.4%

BERKLEY W R CORP 7.4%

Kerry Propper 5.8%

AQR CAPITAL MANAGEMENT LLC 3.4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 39 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
WOLVERINE ASSET MANAGEMENT LLC	13F 13D/G Company 13F 13D/G	8.6% from 13D/G	$3,962,952 360,511 shares mixed-class rows	—	31 Mar 2026
MIZUHO FINANCIAL GROUP INC	13D/G 13D/G	8.4%	$7,987,500 750,000 shares	-$181,050	30 Jun 2025
BERKLEY W R CORP	13F 13D/G Company · W. R. Berkley Corporation 13F 13D/G	7.4% from 13D/G	$3,593,683 309,134 shares	—	31 Mar 2026
Kerry Propper	13D/G 13D/G	5.8%	$2,687,139 240,999 shares	$0	30 Sep 2025
AQR CAPITAL MANAGEMENT LLC	13D/G 13D/G	3.4%	$1,553,920 139,365 shares	$0	30 Sep 2025
TD SECURITIES (USA) LLC	13D/G 13D/G	3.2%	$2,996,221 282,130 shares	-$2,114,591	31 Mar 2025
MIZUHO SECURITIES USA LLC	13F Company 13F	9%	$4,261,320 373,800 shares	—	31 Mar 2026
METEORA CAPITAL, LLC	13F Company 13F	2.1%	$1,041,300 89,000 shares	—	31 Mar 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 25 Jun 2025.

Buys

Insiders: 0

Sells

Insiders: 0

Net

Shares: 0

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 0 Shares: 0

Window (months)	Buy value	Sell value	Net value
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-5 of 5 reporting-owner rows connected to Black Hawk Acquisition Corp. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

Kent Louis Kaufman

Net 12M change

Latest report

04 Apr 2024

Name	Relationship	Valuation	Report Date
Kent Louis Kaufman	Chairman, CEO, and CFO, Director	Mixed	20 Mar 2024
Terry W. Protto	Director	Mixed	20 Mar 2024
Brandon Miller	Director	Mixed	20 Mar 2024
Daniel M. McCabe	Director	Mixed	20 Mar 2024
Black Hawk Management LLC	10%+ Owner	Mixed	04 Apr 2024

Recent insider transactions for Black Hawk Acquisition Corp

Showing up to 300 recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	SEC-reported value	SEC-reported price	Shares	Shares owned	Date	Ownership
No insider transactions were found in the last 12 months for this issuer.

^* marks a reported price that did not pass the local price check.