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Livermore
Livermore
ZHEN

Black Hawk Acquisition Corp

BKHA
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0002000775

No open-market purchases or sales by Black Hawk Acquisition Corp insiders were filed in the last 90 days; 23 institutions reported holding it in 13F filings for Q2 2026, worth $23.3M in total; no superinvestor holds it.

Other share classesBKHARBKHAU

Holders of 5% or more of BKHA

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Black Hawk Acquisition Corp, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of BKHA
HolderLatest formStakeChangeFirst filedLatest filingFiling
Wolverine Asset Management LLC13G8.64%358.9K sharesNewOct 10, 20251 filingOct 10, 2025SEC
Mizuho Financial Group Inc13G/A8.40%750.0K shares−0.20 ppfrom 8.60%Nov 14, 20244 filingsAug 13, 2025SEC
Berkley W R Corp13G/A7.40%308.6K shares+2.20 ppfrom 5.20%Aug 8, 20252 filingsNov 10, 2025SEC
Propper Kerry13G/A5.80%241.0K shares–Nov 12, 20242 filingsNov 13, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

23 Schedule 13D and 13G filings on Black Hawk Acquisition Corp, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on BKHA
Filed (ET)FilerFormStakeChangeEvent dateFiling
Nov 14, 20252:15 PM ETVivaldi Asset Management, LLCand 3 others13G/A0.00%0 shares−8.91 ppfrom 8.91%Below 5%Sep 30, 2025SEC
Nov 13, 20252:41 PM ETPropper Kerryand 1 other13G/A5.80%241.0K shares–Sep 30, 2025SEC
Nov 12, 20251:41 PM ETAQR Capital Management LLCand 2 others13G/A3.36%139.4K shares–Below 5%Sep 30, 2025SEC
Nov 10, 20256:20 PM ETBerkley W R Corpand 1 other13G/A7.40%308.6K shares+2.20 ppfrom 5.20%Sep 30, 2025SEC
Oct 10, 20251:46 PM ETWolverine Asset Management LLCand 4 others13G8.64%358.9K sharesNewSep 30, 2025SEC
Aug 13, 20256:41 AM ETMizuho Financial Group Inc13G/A8.40%750.0K shares−0.20 ppfrom 8.60%Jun 30, 2025SEC
Aug 8, 20255:14 PM ETBerkley W R Corpand 1 other13G5.20%462.5K sharesNewJun 30, 2025SEC
Aug 7, 20254:02 PM ETKarpus Management, Inc.13G/A0.00%0 shares–Below 5%Jul 31, 2025SEC
May 13, 20257:15 AM ETMizuho Financial Group Inc13G/A8.60%767.0K shares+0.90 ppfrom 7.70%Mar 31, 2025SEC
May 12, 20254:30 PM ETTD Securities (USA) LLCand 3 others13G/A3.20%282.1K shares−2.20 ppfrom 5.40%Below 5%Mar 31, 2025SEC
Feb 14, 20257:15 PM ETVivaldi Asset Management, LLCand 3 others13G/A8.91%796.0K shares–Dec 31, 2024SEC
Feb 13, 202511:23 AM ETTD Securities (USA) LLCand 3 others13G5.40%481.2K sharesNewDec 31, 2024SEC
Feb 13, 20259:05 AM ETMizuho Financial Group Inc13G/A7.70%688.1K shares–Dec 31, 2024SEC
Nov 15, 2024Vivaldi Asset Management, LLC13G/AOld format–––SEC
Nov 14, 20248:39 PM ETMizuho Financial Group Inc13GOld format–New–SEC
Nov 14, 2024Vivaldi Asset Management, LLC13GOld format–New–SEC
Nov 14, 2024AQR Capital Management LLC13GOld format–New–SEC
Nov 12, 2024Propper Kerry13GOld format–New–SEC
Nov 12, 2024Harraden Circle Investments, LLC13G/AOld format–––SEC
Jun 7, 2024Karpus Management, Inc.13GOld format–New–SEC
Apr 26, 2024Black Hawk Management LLC13DOld format–––SEC
Apr 1, 2024Black Hawk Management LLC13DOld format–New–SEC
Mar 27, 2024Harraden Circle Investments, LLC13GOld format–New–SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell Black Hawk Acquisition Corp shares.

No Form 144 notices for Black Hawk Acquisition Corp are on file.