GP-Act III Acquisition Corp. (GPAT) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

36,183,009Shares Outstanding

17,163,960Shares held by institutions

$184,684,210Value of institutional holdings

79.32%Institutional ownership %

-2.93%Shares Changed QoQ

52No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

GP-Act III Acquisition Corp. (NASDAQ:GPAT) currently has 52 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

The percentage of GP-Act III Acquisition owned by institutions changed from 82.3% in September 2025 to 79.3% in December 2025, marking a slight down trend.
On a quarter-over-quarter basis, institutional holdings shifted by -2.93%, with a year-over-year an increase of 20.93% in the count of filers.
The latest 13F cycle for GP-Act III Acquisition reveals that of 52 total investors, 13 funds grew their exposure, whereas 13 reduced theirs and 26 made no changes.
The total number of shares held by institutions in GP-Act III Acquisition decreased to 28.70Mn as of December 2025, a net change of down by 865.01K shares quarter on quarter, and up 2.39Mn shares year over year.
The top institutional stake in GP-Act III Acquisition as of December 31, 2025 belongs to Karpus Management, Inc., which owns 2.33Mn shares, or 6.44% of the company.
Among the most significant buyers of GP-Act III Acquisition during December 2025 were L1 Global Manager Pty Ltd (567.57K), Westchester Capital Management, LLC (250.00K), Lineage Point Capital LP (174.79K), METEORA CAPITAL, LLC (157.69K), MIZUHO SECURITIES USA LLC (119.91K).
Leading sellers of GP-Act III Acquisition stock in December 2025 included Polar Asset Management Partners Inc. (1.17Mn), TORONTO DOMINION BANK (461.65K), HEIGHTS CAPITAL MANAGEMENT, INC (426.25K), OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) (100.00K), Wealthspring Capital LLC (13.58K).
The top 10 institutional holders of GP-Act III Acquisition for the quarter ending December 2025 included Karpus Management, Inc. (2.33Mn), First Trust Capital Management L.P. (2.09Mn), PICTON MAHONEY ASSET MANAGEMENT (1.88Mn), Alberta Investment Management Corp (1.62Mn), AQR Arbitrage LLC (1.58Mn), D. E. Shaw & Co., Inc. (1.42Mn), HGC Investment Management Inc. (1.38Mn), Westchester Capital Management, LLC (1.36Mn), MMCAP International Inc. SPC (1.27Mn), LMR Partners LLP (1.23Mn).

52 Institutional Holders

17,163,960 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Karpus Management, Inc.	31 Dec, 2025	2,331,866	25,050	1.09%	$24,927,648.00
First Trust Capital Management L.P.	31 Dec, 2025	2,091,077	0	0.00%	$22,353,613.00
PICTON MAHONEY ASSET MANAGEMENT	31 Dec, 2025	1,875,000	0	0.00%	$20,043,750.00
Alberta Investment Management Corp	31 Dec, 2025	1,625,000	0	0.00%	$17,387,500.00
AQR Arbitrage LLC	31 Dec, 2025	1,576,119	0	0.00%	$16,864,473.00
D. E. Shaw & Co., Inc.	31 Dec, 2025	1,423,125	0	0.00%	$15,227,437.00
HGC Investment Management Inc.	31 Dec, 2025	1,375,000	0	0.00%	$14,698,750.00
Westchester Capital Management, LLC	31 Dec, 2025	1,360,852	250,000	22.51%	$14,561,117.00
MMCAP International Inc. SPC	31 Dec, 2025	1,275,000	0	0.00%	$13,629,750.00
LMR Partners LLP	31 Dec, 2025	1,225,000	0	0.00%	$13,095,250.00
Polar Asset Management Partners Inc.	31 Dec, 2025	1,174,996	-1,174,996	-50.00%	$12,560,707.00
Wealthspring Capital LLC	31 Dec, 2025	1,018,282	-13,581	-1.32%	$10,885,435.00
WOLVERINE ASSET MANAGEMENT LLC	31 Dec, 2025	951,749	-3,117	-0.33%	$10,174,197.00
LINDEN ADVISORS LP	31 Dec, 2025	797,584	0	0.00%	$8,534,149.00
TENOR CAPITAL MANAGEMENT Co., L.P.	31 Dec, 2025	750,000	0	0.00%	$8,017,500.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	625,000	0	0.00%	$6,681,250.00
Radcliffe Capital Management, L.P.	31 Dec, 2025	573,222	327	0.06%	$6,127,743.00
L1 Global Manager Pty Ltd	31 Dec, 2025	567,566	567,566	0.00%	$6,067,281.00
ARISTEIA CAPITAL, L.L.C.	31 Dec, 2025	490,750	0	0.00%	$5,246,118.00
RIVERNORTH CAPITAL MANAGEMENT, LLC	31 Dec, 2025	420,111	-821	-0.20%	$4,490,986.00

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