Gp-Act III Acquisition Corp

CUSIP: G4035N103 | 71 institutional holders

Compare Detailed Historical Funds Options 13D/13G Peers Targeting Trading Summary Profile

Beneficial Ownership — 13D / 13G

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

Holder	Shares	% of Class	Change	Event Date	vs 13F
13G/A AQR Capital Management LLC with AQR Global Alternative Investment Offshore Fund, L.P., AQR Capital Management GP Ltd.	1,400,000	8.7%	New 5%+ stake	Jun 30, 2026	Not yet in a 13F
13G/A First Trust Capital Management L.P.

Institutional Holders — Q2 2026

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Polar Asset Management Partners Inc.1,800,000

0.3% of portfolio$19.6M

AQR Arbitrage LLC1,400,000

0.2% of portfolio$15.2M

Mmcap International Inc. SPC1,275,000

1.2% of portfolio$13.9M

Alberta Investment Management Corp1,000,000

0.1% of portfolio$10.9M

Mizuho Securities USA LLC558,486

0.1% of portfolio$6.0M

Berkley W R Corp497,064

0.2% of portfolio$5.4M

HGC Investment Management Inc.399,387

0.9% of portfolio$4.3M

Verition Fund Management LLC398,885

0.0% of portfolio$4.3M

Toronto Dominion Bank345,181

0.0% of portfolio$3.8M

Deutsche Bank Ag\290,000

0.0% of portfolio$3.1M

Picton Mahoney Asset Management250,000

0.0% of portfolio$2.7M

Periscope Capital Inc.150,000

0.1% of portfolio$1.7M

Healthcare of Ontario Pension Plan Trust Fund149,950

0.0% of portfolio$1.6M

JPMorgan Chase & Co99,860

0.0% of portfolio$1.1M

Lineage Point Capital LP64,795

0.1% of portfolio$716.0K

Moore Capital Management, LP50,000

0.0% of portfolio$543.5K

Kepos Capital LP42,500

0.0% of portfolio$470

Geode Capital Management, LLC21,362

0.0% of portfolio$232.6K

Citadel Advisors LLC20,039

0.0% of portfolio$218.2K

HRT Financial LP14,965

0.0% of portfolio$162

Clear Street Group Inc.9,195

0.0% of portfolio$100.0K

Longfellow Investment Management Co LLC7,800

0.0% of portfolio$84.8K

Morgan Stanley23

0.0% of portfolio$250

UBS Group AG18

0.0% of portfolio$195

				Style	Turnover	Location	Filed
Polar Asset Management Partners Inc.	1,800,000	$19.6M	0.3%	Value	Very High	Toronto, Australia	2026-08-14
AQR Arbitrage LLC	1,400,000	$15.2M	0.2%	Deep Value	Very High	Greenwich, CT	2026-08-14
Mmcap International Inc. SPC	1,275,000	$13.9M	1.2%	Deep Value	Very High	Grand Cayman, Germany	2026-08-14
Alberta Investment Management Corp	1,000,000	$10.9M	0.1%	Value	High	Edmonton, Abu Dhabi	2026-08-06
Mizuho Securities USA LLC	558,486	$6.0M	0.1%	Growth	Medium	New York, NY	2026-07-28
Berkley W R Corp	497,064	$5.4M	0.2%	Yield	High	Greenwich, CT	2026-08-24
HGC Investment Management Inc.	399,387	$4.3M	0.9%	GARP	Very High	Toronto, Australia	2026-08-14
Verition Fund Management LLC	398,885	$4.3M	0.0%	Value	High	Greenwich, CT	2026-08-14
Toronto Dominion Bank	345,181	$3.8M	0.0%	Core	Medium	Toronto, Ontario, Australia	2026-08-14
Deutsche Bank Ag\	290,000	$3.1M	0.0%	Core	Medium	Frankfurt Am Main, Hong Kong	2026-08-07
Picton Mahoney Asset Management	250,000	$2.7M	0.0%	GARP	High	Toronto, Australia	2026-08-13
Periscope Capital Inc.	150,000	$1.7M	0.1%	GARP	High	Toronto, Australia	2026-08-11
Healthcare of Ontario Pension Plan Trust Fund	149,950	$1.6M	0.0%	GARP	High	Toronto, Australia	2026-08-13
JPMorgan Chase & Co	99,860	$1.1M	0.0%	Growth	Medium	New York, NY	2026-08-12
Lineage Point Capital LP	64,795	$716.0K	0.1%	GARP	N/A	Palm Beach, FL	2026-08-14
Moore Capital Management, LP	50,000	$543.5K	0.0%	GARP	Very High	New York, NY	2026-08-14
Kepos Capital LP	42,500	$470	0.0%	Value	Very Low	New York, NY	2026-08-13
Geode Capital Management, LLC	21,362	$232.6K	0.0%	Index	Very Low	Boston, MA	2026-08-12
Citadel Advisors LLC	20,039	$218.2K	0.0%	Core	Very High	Miami, FL	2026-09-02
HRT Financial LP	14,965	$162	0.0%	GARP	Very High	New York, NY	2026-08-14
Clear Street Group Inc.	9,195	$100.0K	0.0%	Agg Growth	Medium	New York, NY	2026-08-12
Longfellow Investment Management Co LLC	7,800	$84.8K	0.0%	Yield	Medium	Boston, MA	2026-08-06
Morgan Stanley	23	$250	0.0%	Core	Low	New York, NY	2026-08-13
UBS Group AG	18	$195	0.0%	Core	Medium	Zurich, Switzerland	2026-08-13