GP-Act III Acquisition GPAT Institutional Ownership

NASDAQ GPAT

$10.97 +0.00 (+0.00%)

At close: Sep 8, 2026 · 4:00 PM EDT

Institutions by Trading Activity

24 Institutions

Increased 7 29.2%

Unchanged 5 20.8%

Reduced 12 50.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

36.54%

▼-38.61 pp QoQ

Shares Held by Institutions

8.35Mn

of 22.84Mn outstanding

▼-21.95% QoQ

Shares Outstanding

22.84Mn

14.49Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▼-28 vs prior quarter

Net Shares Added (QoQ)

-2.35Mn

distributed since last quarter

Value of Holdings

$91.56Mn

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

GP-Act III Acquisition Corp. (NASDAQ:GPAT) showed up in the 13F filings of 24 institutional investors as of June 2026.

Collectively, these holders controlled 36.5% of GP-Act III Acquisition's outstanding shares in June 2026, down from 75.1% in March 2026.
They decreased total shares held in GPAT by -21.95% quarter over quarter, and investors in GP-Act III Acquisition decreased 48.94% from a year ago.
Of these 24 holders, 7 added to their stakes in GP-Act III Acquisition, 12 trimmed positions, and 5 made no changes.
Combined, these investors held 8.35Mn shares in GPAT for June 2026, down by 2.35Mn shares quarter on quarter, and down 21.15Mn shares year over year.
Polar Asset Management Partners Inc. holds the largest position in GPAT at 1.8Mn shares as of June 30, 2026, or 7.88% of shares outstanding.
The largest buyers of GP-Act III Acquisition for the quarter ending June 2026 were Polar Asset Management Partners Inc. (625.0K), HGC Investment Management Inc. (399.39K), Verition Fund Management LLC (171.3K), HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND (149.95K), HRT FINANCIAL LP (14.96K).
The largest sales of GPAT for the quarter ending June 2026 came from PICTON MAHONEY ASSET MANAGEMENT (1.12Mn), Jpmorgan Chase & Co (902.11K), Alberta Investment Management Corp (625.0K), Berkley W R Corp (349.76K), Toronto Dominion Bank (290.28K).
According to Business Quant data, leading holders of GPAT for June 2026 are Polar Asset Management Partners Inc. (1.8Mn), AQR Arbitrage LLC (1.4Mn), MMCAP International Inc. SPC (1.27Mn), Alberta Investment Management Corp (1.0Mn), Berkley W R Corp (497.06K), HGC Investment Management Inc. (399.39K), Verition Fund Management LLC (398.88K), Toronto Dominion Bank (345.18K), DEUTSCHE BANK AG\ (290.0K), PICTON MAHONEY ASSET MANAGEMENT (250.0K).

Form 13F Holdings

24 Institutional Holders

Report period 30 Jun, 2026

Total shares held 8.35Mn

Of outstanding 36.54%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Polar Asset Management Partners Inc.	0001326389	1,800,000	7.88%	▲625,004	+53.19%	$19.57Mn
2	AQR Arbitrage LLC	0001167456	1,400,000	6.13%	▼176,803	-11.21%	$15.25Mn
3	MMCAP International Inc. SPC	0001304857	1,275,000	5.58%	0	0.00%	$13.86Mn
4	Alberta Investment Management Corp	0001463559	1,000,000	4.38%	▼625,000	-38.46%	$10.89Mn
5	Berkley W R Corp	0000011544	497,064	2.18%	▼349,759	-41.30%	$5.41Mn
6	HGC Investment Management Inc.	0001711200	399,387	1.75%	▲399,387	0.00%	$4.34Mn
7	Verition Fund Management LLC	0001454027	398,885	1.75%	▲171,297	+75.27%	$4.34Mn
8	Toronto Dominion Bank	0000947263	345,181	1.51%	▼290,284	-45.68%	$3.75Mn
9	DEUTSCHE BANK AG\	0000948046	290,000	1.27%	0	0.00%	$3.15Mn
10	PICTON MAHONEY ASSET MANAGEMENT	0001539041	250,000	1.09%	▼1,125,000	-81.82%	$2.72Mn
11	PERISCOPE CAPITAL INC.	0001695320	150,000	0.66%	▼100,000	-40.00%	$1.66Mn
12	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	0001535845	149,950	0.66%	▲149,950	0.00%	$1.63Mn
13	Jpmorgan Chase & Co	0000019617	99,860	0.44%	▼902,110	-90.03%	$1.09Mn
14	Lineage Point Capital LP	0002093311	64,795	0.28%	▼205	-0.32%	$715.99K
15	MIZUHO SECURITIES USA LLC	0000812291	60,098	0.26%	0	0.00%	$649.06K
16	MOORE CAPITAL MANAGEMENT, LP	0001448574	50,000	0.22%	▼150,000	-75.00%	$543.50K
17	Kepos Capital LP	0001512020	42,500	0.19%	0	0.00%	$470
18	GEODE CAPITAL MANAGEMENT, LLC	0001214717	21,362	0.09%	▲9,967	+87.47%	$232.63K
19	CITADEL ADVISORS LLC	0001423053	20,039	0.09%	▲2,867	+16.70%	$218.23K
20	HRT FINANCIAL LP	0001475597	14,965	0.07%	▲14,965	0.00%	$162

Showing 1 to 20 of 24 holders