$QSEA

$10.71 +$0.00 (0.01%) Close

$QSEA Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 10.1M shares outstanding

Who owns QSEA?

By type of holder

Institutions 73.5% Insiders 0.0% Everyone else 26.5%

Concentration Top 10 holders own 93.3%

Blue Jay Investment LLC 30.9% · Karpus Management, Inc. 9.6%

Institutional ownership

73.5%

-2.4 pts vs last qtr

Institutional holders

-6 vs last qtr

Net shares bought

−240.5K

by institutions in Q2 2026

New / sold out

1 / 7

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Mizuho Securities USA LLC +993.3K
Berkley W R Corp +688.6K

Biggest sellers in Q2 2026

Karpus Management, Inc. −1.3M
Mangrove Partners Im, LLC SOLD OUT −408.2K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Quartzsea Acquisition Corp in the last 12 months.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Quartzsea Acquisition Corp.

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years94% Under 1 year6%

Quarterly turnover

29.9%

of institutional shares changed hands

Top 10 managers, median time held

1.3 years

Super Investors

Investment managers reporting QSEA on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
KM Karpus Management, Inc.	974.8K	9.62%	−1.3M (−56.8%)	2025	0.3%
Shares held by quarter Peak holding2.3M (Q2'25) Change over 8 quarters+974.8K Share of the company9.620% Karpus Management, Inc.'s full portfolio →
MS Mizuho Securities USA LLC	1.7M	16.49%	+993.3K (+146.6%)	2025	0.2%
Shares held by quarter Peak holding1.7M (Q2'26) Change over 8 quarters+1.7M Share of the company16.490% Mizuho Securities USA LLC's full portfolio →

Karpus Management, Inc.

974.8K

% of company

9.62%

Change vs last qtr

−1.3M (−56.8%)

Held since

2025

Mizuho Securities USA LLC

1.7M

% of company

16.49%

Change vs last qtr

+993.3K (+146.6%)

Held since

2025

25 more super investors behind a free account

See every manager holding Quartzsea Acquisition Corp, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting QSEA on Form N-PORT; together they hold 1.7% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
RO RiverNorth Opportunities Fund Inc. Rivernorth Opportunities Fund Inc.	$1.05M	100.0K	0.99%	0.32%	June 30, 2026
FT First Trust Alternative Opportunities Fund First Trust Alternative Opportunities Fund	$473K	45.0K	0.44%	0.01%	June 30, 2026

RiverNorth Opportunities Fund Inc.

Rivernorth Opportunities Fund Inc.

Position value

$1.05M

% of company

0.99%

% of the fund

0.32%

As of

June 30, 2026

First Trust Alternative Opportunities Fund

Position value

$473K

% of company

0.44%

% of the fund

0.01%

As of

June 30, 2026

2 more funds behind a free account

See every fund holding Quartzsea Acquisition Corp and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
BJ Blue Jay Investment LLC 5%+ holder 13D · 27.4%	3.1M	30.88%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company30.880% Disclosed stake13D · 27.4% View the 13D/G filing →

Blue Jay Investment LLC

5%+ holder13D · 27.4%

3.1M

% of company

30.88%

Change vs last qtr

—

Held since

—

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