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QSEA · Quartzsea Acquisition Corp · Holdings

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$10.73 +0.00 (+0.04%)
Market Cap
$108.64M
Shares
10.13M
Volume · Oct 19 17.22K Avg daily vol (3M) 14.2K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.
Holders: 26
Total Value: $70,904,999
Total Shares: 13,158,199

Institutional Ownership Trend

6 quarters

Holder Concentration

Across 26 13F filers · Δ vs Mar 31, 2026
Top Holder
16.2%
Mar 2025 → Jun 2026 · range 16.2% – 31.0%
−13.7 pts
Top 5
61.9%
Mar 2025 → Jun 2026 · range 54.9% – 61.9%
+2.9 pts
Top 10
86.5%
Mar 2025 → Jun 2026 · range 76.9% – 86.5%
+5.2 pts
HHI
986
Mar 2025 → Jun 2026 · range 866 – 1,304
Broadly held−267

Who Holds QSEA

Last 6 quarters through Jun 30, 2026

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026: 26 filers, like-for-like change -7.6%; actively managed books -10.4%; index-like books +39.1%.

Holder type Share Filers Change
Registered adviser 63.1% 14 -9.5%
Adviser 7.4% 1 -59.3%
Bank 3.7% 2 -22.3%
Insurer 8.3% 1 +169.8%
Non-US 1.0% 1 0.0%
Holding company 0.9% 2 0.0%
Broker-dealer 0.0% 0 —
Unknown 15.5% 5 +47.7%
How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Conviction and Crowding

21 13F filers, quarter ended Jun 30, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders
0
0.000% of filers hold it in their top 10
Mar 31, 2026: 0
Holders above 5%
0
median weight 0.071%
Mar 31, 2026: 0
Crowding
20.8%
of shares outstanding, 61st percentile
Mar 31, 2026: 33.6%
Private-fund advisers
19.3%
of shares outstanding
Institutional ownership
59.1%
130.9% of the estimated free float above 100%: filers can report lent or client shares more than once
Top 10 holders
86.5%
of 13F shares, Herfindahl 0.099
Active holders
-16.4%
like-for-like share change of active filers
5% stakes on record
5
1 13D, 4 13G (3 institutional, 1 passive, 0 exempt)
How long holders have held it value-weighted 4.7 quarters
Under 1 year 6.07% 1 to 3 years 93.9% 3 years or more 0.000% Since coverage start 0.000%

Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).

Estimated Holder Cost Basis

Quarter ended Jun 30, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost
$10.12
estimated per share
Mar 31, 2026: $10.03
Quarter-end price
$10.52
implied by 13F values
Estimated gain or loss
+4.0%
price against the estimated cost
Estimated at a loss
0.000%
of costed 13F value

Estimated cost covers 81.5% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies QSEA's active holders also own, quarter ended Jun 30, 2026
# Company Shared holders
1 RIBB Ribbon Acquisition Corp. 4
2 SCII SC II Acquisition Corp. 4
3 FVN Future Vision II Acquisition Corp. 3
4 CRAC Crown Reserve Acquisition Corp. I 3
5 KCHV Kochav Defense Acquisition Corp. 3
6 EURK Eureka Acquisition Corp 3
7 INAC Indigo Acquisition Corp. 4
8 IPEX Inflection Point Acquisition Corp. V 4
9 GTERA Globa Terra Acquisition Corp 4
10 CCAQ Collective Acquisition Corp. 4

Shareholder Targets

13F filers that own its peers but not QSEA, quarter ended Jun 30, 2026

Found through its holder-overlap peers: RIBB, SCII, FVN, CRAC, KCHV, EURK, INAC, IPEX, GTERA, CCAQ, BLUW, NOEM, TVAI, HVMC, APAC, OYSE, ALIS, GIW, SOCA, PONO. 94 filers in all.

# Filer In peers
1 Magnetar Financial LLC Registered adviser, Concentrated $111,572,009 14 held
2 ARISTEIA CAPITAL, L.L.C. Registered adviser, Diversified active $82,073,165 16 held
3 TENOR CAPITAL MANAGEMENT Co., L.P. Registered adviser, Diversified active $73,337,125 10 held
4 TWO SIGMA INVESTMENTS, LP Registered adviser, Systematic-like $71,014,820 16 held
5 Radcliffe Capital Management, L.P. Registered adviser, Diversified active $60,076,776 17 held
6 MILLENNIUM MANAGEMENT LLC Registered adviser, Systematic-like $48,831,861 8 held
7 WHITEBOX ADVISORS LLC Registered adviser, Diversified active $41,313,800 15 held
8 LMR Partners LLP Exempt adviser, Systematic-like $38,652,275 5 held
9 PICTON MAHONEY ASSET MANAGEMENT Non-US, Diversified active $37,305,675 10 held
10 Periscope Capital Inc. Exempt adviser, Diversified active $36,030,995 12 held

Fund Ownership of QSEA by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 0.00% of shares outstanding.

Fund type Of shares outstanding Shares
Index funds 0.00% 0
Index ETFs 0.00% 0
Active ETFs 0.04% 4,536
Active funds 1.58% 159,901
Unclassified 0.00% 0
All registered funds 1.62% 164,437
How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Quarterly Activity

vs Mar 31, 2026
New
1
Increased
9
Decreased
12
Sold Out
5
Unchanged
4

New and Sold Out count only filers that reported a 13F for both quarters: a first-time filer's book is not a buy, and a fund that has not filed, or withheld its positions under confidential treatment, has not sold.

Holder count: -4
Institutional value: -9.2%
Shares held: -7.6%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 38 of 38
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 2047455 CUSIP G7314B104 Visit website