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Eureka Acquisition Corp

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Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Eureka Acquisition Corp

CIK 0002000410EURKEURKREURKU· quarter ending 2026-06-30
Shares outstanding
2,170,601
as of 2026-07-22 · 10-Q cover page, filed 2026-07-23
Held by 13F filers
1,469,565
200.5% of Common Class A
Holders
14
-8 vs 2026-03-31 · 0 new, 8 exited
Value
$16.9M
shares -44.5% vs prior quarter
13F holdings exceed the share count. This is normal for heavily shorted stocks: shares lent to short sellers are reported by the lender and again by whoever bought them. Related filers occasionally report the same position twice as well.

Share classes (cover page of the 10-Q filed 2026-07-23, as of 2026-07-22)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common Class AEURK · NASDAQ733,1011,469,565200.5%14G32168109
Common Class Bnot listed1,437,500——

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine
CountCUSIPClass (as filers write it)HoldersShares heldClass shares% of classValueOptionsMapped via
G32168109SHS CL A141,469,565733,101200.5%$16.9M—13DGholders →
G32168125RIGHT 07/03/2026not common194,197,856——$1.4M—NPORTholders →
G32168117UNIT 06/25/2029not common219,602——$227K—prefixholders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (14 of 14 · G32168109)

change vs 2026-03-31
#FilerShares% of classValueChange
1BERKLEY W R CORP315,48843.03%$3.6M—
2MIZUHO SECURITIES USA LLC300,45540.98%$3.3M—
3AQR Arbitrage LLC171,42223.38%$2.1M+100 (+0.1%)
4RLH Capital LLC155,40021.20%$1.8M-140,000 (-47.4%)
5Quarry LP155,40021.20%$1.8M—
6Cable Car Capital, LP100,00013.64%$1.2M—
7Crossingbridge Advisors, LLC73,76810.06%$842K-42,921 (-36.8%)
8Yakira Capital Management, Inc.72,9519.95%$835K—
9Westchester Capital Management, LLC50,0006.82%$571K—
10Clear Street Group Inc.43,6325.95%$523K-57,035 (-56.7%)
11GOLDMAN SACHS GROUP INC20,8582.85%$250K—
12Warberg Asset Management LLC10,0571.37%$115K-2,726 (-21.3%)
13UBS Group AG850.01%$1K-4 (-4.5%)
14MORGAN STANLEY490.01%$588-3 (-5.8%)
Exited since 2026-03-31 (8 filers; largest 8 shown)
WOLVERINE ASSET MANAGEMENT LLC−395,924
Karpus Management, Inc.−200,925
Polar Asset Management Partners Inc.−167,000
METEORA CAPITAL, LLC−50,000
HRT FINANCIAL LP−49,000
Logan Stone Capital, LLC−42,466
TORONTO DOMINION BANK−16,200
HEIGHTS CAPITAL MANAGEMENT, INC−15,400

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting personFormFiledEventShares% of class
Mizuho Financial Group, Inc.SCHEDULE 13G/A2026-08-132026-06-3000%
Berkley Insurance CompanySCHEDULE 13G/A2026-08-062026-06-3000%
W. R. Berkley CorporationSCHEDULE 13G/A2026-08-062026-06-3000%
Lawrence M. FeisSCHEDULE 13G/A2026-07-142026-07-0700%
Feis Equities LLCSCHEDULE 13G/A2026-07-142026-07-0700%
Robert R. BellickSCHEDULE 13G/A2026-07-092026-07-0600%
Christopher L. GustSCHEDULE 13G/A2026-07-092026-07-0600%
Wolverine Holdings, LLCSCHEDULE 13G/A2026-07-092026-07-0600%
Wolverine Asset Management, LLCSCHEDULE 13G/A2026-07-092026-07-0600%
KARPUS MANAGEMENT, INC.SCHEDULE 13G/A2026-04-072026-03-31200,9254.16%
First Trust Capital Management L.P.SCHEDULE 13G/A2025-11-142025-09-3000%
First Trust Capital Solutions L.P.SCHEDULE 13G/A2025-11-142025-09-3000%
First Trust Merger Arbitrage FundSCHEDULE 13G/A2025-11-142025-09-3000%
FTCS Sub GP LLCSCHEDULE 13G/A2025-11-142025-09-3000%
Antonio Ruiz-GimenezSCHEDULE 13G/A2025-11-132025-09-3000%
Kerry PropperSCHEDULE 13G/A2025-11-132025-09-3000%
AQR Capital Management Holdings, LLCSCHEDULE 13G/A2025-08-142025-06-30179,1415.65%
AQR Capital Management, LLCSCHEDULE 13G/A2025-08-142025-06-30179,1415.65%
AQR Arbitrage, LLCSCHEDULE 13G/A2025-08-142025-06-30179,1415.65%
Louis CamhiSCHEDULE 13G/A2025-07-072025-06-30295,4009.3%
RLH Capital LLCSCHEDULE 13G/A2025-07-072025-06-30295,4009.3%
Barclays PLCSCHEDULE 13G/A2025-03-212024-09-30325,0005.23%
WOLVERINE ASSET MANAGEMENT LLCSCHEDULE 13G2025-01-312024-12-31487,3297.85%
Wolverine Holdings, L.P.SCHEDULE 13G2025-01-312024-12-31487,3297.85%
Wolverine Trading Partners, Inc.SCHEDULE 13G2025-01-312024-12-31487,3297.85%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.