Institutional HoldersBeta

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.

Blue Water Acquisition Corp. IV

CIK 0002082847BWIVBWIV-UNBWIV-WT· quarter ending 2026-06-30
Shares outstanding
17,758,334
Held by 13F filers
2,551,352
selection includes debt or preferreds — no % of shares outstanding
Holders
13
-28 vs 2026-03-31 · 4 new, 32 exited
Value
$25.6M
shares -78.6% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-14, as of 2026-08-14)

ClassListedShares outstandingHeld by 13F filers% of classHoldersCUSIP
Common Class ABWIV · NYSE13,425,0009,950,04074.1%35G1368A104
Common Class Bnot listed4,333,334——

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
G1368A104ORD SHS CL A359,950,04013,425,00074.1%$98.5M—13DGholders →
G1368A120UNIT 99/99/9999not common132,551,352——$25.6M—13DGholders →
G1368A112*W EXP 08/09/203not common304,497,831——$1.5M1 call / 0 putprefixholders →

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 (13 of 13 · G1368A120)

change vs 2026-03-31
#FilerShares / principal% of classValueChange
1ARISTEIA CAPITAL, L.L.C.500,000—$5.0M—
2LMR Partners LLP500,000—$5.0M—
3Lineage Point Capital LP455,336—$4.6M-7,564 (-1.6%)
4Calamos Advisors LLC300,000—$3.0M—
5Centiva Capital, LP200,000—$2.0MNEW
6Qube Research & Technologies Ltd150,000—$1.5M—
7MILLENNIUM MANAGEMENT LLC125,000—$1.3M-475,000 (-79.2%)
8Ghisallo Capital Management LLC100,000—$1.0M—
9Westchester Capital Management, LLC100,000—$1.0M—
10Clear Street Group Inc.46,194—$464KNEW
11JANE STREET GROUP, LLC34,550—$347K-51,287 (-59.7%)
12StoneX Group Inc.25,000—$253KNEW
13SUSQUEHANNA INTERNATIONAL GROUP, LLP15,272—$153KNEW
Exited since 2026-03-31 (32 filers; largest 25 shown)
ADAGE CAPITAL PARTNERS GP, L.L.C.−1,125,000
Magnetar Financial LLC−950,000
Wealthspring Capital LLC−658,077
Linden Advisors LP−625,000
Alberta Investment Management Corp−600,000
RIVERNORTH CAPITAL MANAGEMENT, LLC−500,000
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND−500,000
WHITEBOX ADVISORS LLC−350,000
SONA ASSET MANAGEMENT (US) LLC−350,000
TENOR CAPITAL MANAGEMENT Co., L.P.−300,000
BNP PARIBAS FINANCIAL MARKETS−299,871
AQR Arbitrage LLC−293,029
Radcliffe Capital Management, L.P.−275,000
Verition Fund Management LLC−259,028
Kryger Capital LLC−250,000
TWO SIGMA INVESTMENTS, LP−226,562
MOORE CAPITAL MANAGEMENT, LP−200,000
K2 PRINCIPAL FUND, L.P.−200,000
GLAZER CAPITAL, LLC−178,136
Shaolin Capital Management LLC−150,000
BERKLEY W R CORP−149,160
DELTEC ASSET MANAGEMENT LLC−125,000
Mint Tower Capital Management B.V.−100,000
Periscope Capital Inc.−100,000
Saba Capital Management, L.P.−99,999

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
Adage Capital Management, L.P.SCHEDULE 13G2026-05-132026-03-311,125,0008.38%
DAVID J. SNYDERMANSCHEDULE 13G2026-05-132026-03-31950,0007.07%
MAGNETAR CAPITAL PARTNERS LPSCHEDULE 13G2026-05-132026-03-31950,0007.07%
MAGNETAR FINANCIAL LLCSCHEDULE 13G2026-05-132026-03-31950,0007.07%
Phillip GrossSCHEDULE 13G2026-05-132026-03-311,125,0008.38%
Robert AtchinsonSCHEDULE 13G2026-05-132026-03-311,125,0008.38%
SUPERNOVA MANAGEMENT LLCSCHEDULE 13G2026-05-132026-03-31950,0007.07%
Blue Water Acquisition IV LLCSCHEDULE 13G2026-04-152026-03-195,066,66727.8%
Joseph HernandezSCHEDULE 13G2026-04-152026-03-195,066,66727.8%
Matthew SimpsonSCHEDULE 13G2026-04-092026-03-31675,7575.2%
Wealthspring Capital LLCSCHEDULE 13G2026-04-092026-03-31675,7575.2%

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.