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

13F Institutional Holders and Ownership History from Q3 2024 to Q4 2025

Type / Class
Equity / Common
Symbol
GPAT on Nasdaq
Shares outstanding
28,772,451
Price per share
$10.69
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
28,701,980
Total reported value
$306,870,611
% of total 13F portfolios
0%
Share change
-84,172
Value change
-$905,669
Number of holders
52
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of GP-Act III Acquisition Corp. - Common (GPAT) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
GP-Act III Sponsor LLC 20% $73,543,250 7,112,500 GP-Act III Sponsor LLC 14 Nov 2024
HGC Investment Management Inc. 8.6% $25,591,500 2,475,000 HGC Investment Management Inc 31 Dec 2024
Karpus Management, Inc. 6.5% -36% $24,676,619 -$13,740,826 2,339,016 -36% KARPUS MANAGEMENT, INC. 30 Jun 2025
METEORA CAPITAL, LLC 6.7% $20,329,839 1,926,999 Meteora Capital, LLC 30 Jun 2025
PICTON MAHONEY ASSET MANAGEMENT 6.5% $19,387,500 1,875,000 Picton Mahoney Asset Management 30 Sep 2024
BARCLAYS PLC 5.2% 0% $15,365,126 1,485,989 0% Barclays PLC 30 Sep 2024
MMCAP International Inc. SPC 4.4% -40% $13,451,250 -$8,440,000 1,275,000 -39% MMCAP International Inc. SPC 30 Jun 2025
Polar Asset Management Partners Inc. 4.1% $12,396,208 1,174,996 Polar Asset Management Partners Inc. 30 Jun 2025

As of 31 Dec 2025, 52 institutional investors reported holding 28,701,980 shares of GP-Act III Acquisition Corp. - Common (GPAT). This represents 100% of the company’s total 28,772,451 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of GP-Act III Acquisition Corp. - Common (GPAT) together control 89% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Karpus Management, Inc. 8.1% 2,331,866 +1.1% 0.77% $24,927,648
First Trust Capital Management L.P. 7.3% 2,091,077 0% 1.4% $22,353,613
PICTON MAHONEY ASSET MANAGEMENT 6.5% 1,875,000 0% 0.22% $20,043,750
Alberta Investment Management Corp 5.6% 1,625,000 0% 0.1% $17,387,500
AQR Arbitrage LLC 5.5% 1,576,119 0% 0.35% $16,864,473
D. E. Shaw & Co., Inc. 4.9% 1,423,125 0% 0.01% $15,227,437
HGC Investment Management Inc. 4.8% 1,375,000 0% 3.1% $14,698,750
Westchester Capital Management, LLC 4.7% 1,360,852 +23% 0.68% $14,561,117
MMCAP International Inc. SPC 4.4% 1,275,000 0% 1.4% $13,629,750
LMR Partners LLP 4.3% 1,225,000 0% 0.13% $13,095,250
Polar Asset Management Partners Inc. 4.1% 1,174,996 0% 0.25% $12,560,707
Wealthspring Capital LLC 3.5% 1,018,282 -1.3% 2.6% $10,885,435
WOLVERINE ASSET MANAGEMENT LLC 3.3% 951,749 -0.33% 0.14% $10,174,197
Linden Advisors LP 2.8% 797,584 0% 0.05% $8,534,149
TENOR CAPITAL MANAGEMENT Co., L.P. 2.6% 750,000 0% 0.11% $8,017,500
TWO SIGMA INVESTMENTS, LP 2.2% 625,000 0% 0.01% $6,681,250
Radcliffe Capital Management, L.P. 2% 573,222 +0.06% 0.33% $6,127,743
L1 Global Manager Pty Ltd 2% 567,566 0% 4% $6,067,281
ARISTEIA CAPITAL, L.L.C. 1.7% 490,750 0% 0.15% $5,246,118
RIVERNORTH CAPITAL MANAGEMENT, LLC 1.5% 420,111 -0.2% 0.21% $4,490,986
HEIGHTS CAPITAL MANAGEMENT, INC 1.4% 416,096 -1.2% 1.7% $4,452,227
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 1.4% 412,264 0% 0.02% $4,407,102
METEORA CAPITAL, LLC 1.4% 408,719 +63% 0.37% $4,369,206
TORONTO DOMINION BANK 1.4% 400,000 -54% 0.01% $4,276,000
Periscope Capital Inc. 1.2% 344,000 0% 0.71% $3,677,360

Institutional Holders of GP-Act III Acquisition Corp. - Common (GPAT) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 28,701,980 $306,870,611 -$905,669 $10.69 52
2025 Q3 28,464,967 $301,709,090 +$1,201,744 $10.60 53
2025 Q2 27,893,423 $294,132,103 +$24,825,280 $10.55 48
2025 Q1 26,156,583 $269,542,525 -$1,553,040 $10.30 40
2024 Q4 26,307,572 $266,800,243 +$12,250,289 $10.14 42
2024 Q3 24,657,456 $248,498,703 +$243,861,903 $10.08 37