Quartzsea Acquisition QSEA Institutional Ownership

NASDAQ QSEA

$10.70 -0.01 (-0.09%)

As of: Oct 2, 2026 · 11:09 AM EDT

Institutions by Trading Activity

21 Institutions

Increased 10 47.6%

Unchanged 3 14.3%

Reduced 8 38.1%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

32.63%

▼-33.36 pp QoQ

Shares Held by Institutions

6.42Mn

of 19.69Mn outstanding

▼-3.41% QoQ

Shares Outstanding

19.69Mn

13.27Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▼-5 vs prior quarter

Net Shares Added (QoQ)

-226.55K

distributed since last quarter

Value of Holdings

$68.61Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Quartzsea Acquisition Corp (NASDAQ:QSEA) appears in 21 institutional 13F filings for the quarter ending June 2026.

These investors collectively held 32.6% of Quartzsea Acquisition's outstanding shares in June 2026, down from 66.0% in March 2026.
They decreased total shares held in Quartzsea Acquisition by -3.41% from the prior quarter, while the number of investors in QSEA decreased 12.5% year over year.
Among the 21 funds, 10 bought more Quartzsea Acquisition shares, 8 sold down, and 3 held their ground.
The aggregate institutional position in Quartzsea Acquisition amounted to 6.42Mn shares as of June 2026, down by 226.55K shares quarter on quarter, and down 513.53K shares year over year.
Berkley W R Corp leads ownership in QSEA with 1.09Mn shares as of June 30, 2026, equal to 5.56% of outstanding shares.
Top purchasers of QSEA stock for the quarter ending June 2026 included Berkley W R Corp (688.64K), Westchester Capital Management, LLC (245.0K), RLH Capital LLC (211.1K), Clear Street Group Inc. (128.53K), Polar Asset Management Partners Inc. (25.0K).
Top sellers of QSEA stock for the quarter ending June 2026 included Karpus Management, Inc. (1.28Mn), WOLVERINE ASSET MANAGEMENT LLC (104.03K), Shaolin Capital Management LLC (61.75K), Toronto Dominion Bank (50.0K), GLAZER CAPITAL, LLC (22.66K).
According to Business Quant data, leading holders of QSEA for June 2026 are Berkley W R Corp (1.09Mn), Karpus Management, Inc. (974.76K), MIZUHO SECURITIES USA LLC (677.75K), Westchester Capital Management, LLC (611.6K), RIVERNORTH CAPITAL MANAGEMENT, LLC (499.66K), WOLVERINE ASSET MANAGEMENT LLC (495.49K), Polar Asset Management Partners Inc. (375.0K), AQR Arbitrage LLC (356.21K), RLH Capital LLC (252.44K), Hudson Bay Capital Management LP (175.16K).

Form 13F Holdings

21 Institutional Holders

Report period 30 Jun, 2026

Total shares held 6.42Mn

Of outstanding 32.63%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Berkley W R Corp	0000011544	1,094,190	5.56%	▲688,641	+169.80%	$11.50Mn
2	Karpus Management, Inc.	0001048703	974,765	4.95%	▼1,282,040	-56.81%	$10.25Mn
3	MIZUHO SECURITIES USA LLC	0000812291	677,754	3.44%	0	0.00%	$6.95Mn
4	Westchester Capital Management, LLC	0001512805	611,605	3.11%	▲245,000	+66.83%	$6.43Mn
5	RIVERNORTH CAPITAL MANAGEMENT, LLC	0001447578	499,664	2.54%	▼92	-0.02%	$5.32Mn
6	WOLVERINE ASSET MANAGEMENT LLC	0001279891	495,488	2.52%	▼104,034	-17.35%	$5.21Mn
7	Polar Asset Management Partners Inc.	0001326389	375,000	1.90%	▲25,000	+7.14%	$3.95Mn
8	AQR Arbitrage LLC	0001167456	356,213	1.81%	▲1,925	+0.54%	$3.75Mn
9	RLH Capital LLC	0002008031	252,439	1.28%	▲211,100	+510.66%	$2.66Mn
10	Hudson Bay Capital Management LP	0001393825	175,159	0.89%	▲159	+0.09%	$1.84Mn
11	D. E. Shaw & Co., Inc.	0001009207	171,612	0.87%	▲1,500	+0.88%	$1.81Mn
12	Toronto Dominion Bank	0000947263	150,000	0.76%	▼50,000	-25.00%	$1.58Mn
13	Clear Street Group Inc.	0001881567	128,529	0.65%	▲128,529	0.00%	$1.35Mn
14	GLAZER CAPITAL, LLC	0001076809	126,887	0.64%	▼22,657	-15.15%	$1.34K
15	Goldman Sachs Group Inc	0000886982	119,661	0.61%	0	0.00%	$1.26Mn
16	Shaolin Capital Management LLC	0001766806	114,840	0.58%	▼61,746	-34.97%	$1.21Mn
17	Dakota Wealth Management	0001631353	49,760	0.25%	▼19,740	-28.40%	$523.48K
18	Warberg Asset Management LLC	0001597506	22,916	0.12%	▲965	+4.40%	$241.08K
19	BNP PARIBAS FINANCIAL MARKETS	0001166588	16,987	0.09%	0	0.00%	$178.70K
20	CITADEL ADVISORS LLC	0001423053	10,948	0.06%	▲10,948	0.00%	$115.17K

Showing 1 to 20 of 21 holders