Westchester Capital Management (New York)’s GP-Act III Acquisition Corp GPAT Stock Holding History

Westchester Capital Management (New York)’s Portfolio GPAT Stock Details GPAT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$9.33M	Sell	860,852 -500,000	-37%	-$5.38M	0.42%	47
2025 Q4	$14.6M	Buy	1,360,852 +250,000	+23%	+$2.67M	0.61%	29
2025 Q3	$11.8M	Sell	1,110,852 -50,000	-4%	-$529K	0.54%	40
2025 Q2	$12.2M	Hold	1,160,852	–	–	0.64%	32
2025 Q1	$12M	Buy	1,160,852 +250,852	+28%	+$2.57M	0.62%	31
2024 Q4	$9.23M	Buy	910,000 +360,000	+65%	+$3.64M	0.5%	38
2024 Q3	$5.53M	Buy	+550,000	New	+$5.51M	0.24%	56

Other funds holding GPAT

KIM

Karpus Investment Management Pittsford, New York $3.21B AUM 6.83% 1-Year Est. Return

FTCM

First Trust Capital Management Chicago, Illinois $1.9B AUM 58.28% 1-Year Est. Return

AIMCA

Alberta Investment Management Corp (AIMCo) Edmonton, Alberta, Canada $17.9B AUM 27.57% 1-Year Est. Return

AQR Arbitrage Greenwich, Connecticut $6.09B AUM 26.7% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

PMAM

Picton Mahoney Asset Management Toronto, Ontario, Canada $13.5B AUM 50.39% 1-Year Est. Return

MMCAP International Grand Cayman, Cayman Islands $1.16B AUM 76.63% 1-Year Est. Return

LMR Partners London, United Kingdom $45.4B AUM 60.47% 1-Year Est. Return

PAMP

Polar Asset Management Partners Toronto, Ontario, Canada $5.01B AUM 35.02% 1-Year Est. Return

Wealthspring Capital West Harrison, New York $448M AUM 8.34% 1-Year Est. Return

Westchester Capital Management (New York)'s GPAT Position: Q1 2026 in Review

Westchester Capital Management (New York) reduced its GP-Act III Acquisition Corp (GPAT) stake by 37% in Q1 2026, selling an estimated $5.38M and leaving 860,852 shares worth $9.33M. The position accounts for 0.42% of the portfolio, ranked #47.

Westchester Capital Management (New York) first reported a position in GPAT in Q3 2024 and has held it in 7 quarters since. The position peaked at $14.6M in Q4 2025. 51 funds tracked by Wall St. Rank hold GPAT as of Q1 2026.

Westchester Capital Management (New York) held 860,852 shares of GP-Act III Acquisition Corp worth $9.33M as of Q1 2026.
Westchester Capital Management (New York) sold 500,000 GP-Act III Acquisition Corp shares in Q1 2026, an estimated $5.38M.
GP-Act III Acquisition Corp made up 0.42% of Westchester Capital Management (New York)'s portfolio in Q1 2026, its #47 holding.
Westchester Capital Management (New York) first reported a position in GP-Act III Acquisition Corp in Q3 2024 and has held it in 7 quarters since.
Westchester Capital Management (New York)'s GP-Act III Acquisition Corp position peaked at $14.6M in Q4 2025.
51 funds tracked by Wall St. Rank held GP-Act III Acquisition Corp as of Q1 2026.

Based on Westchester Capital Management (New York)'s 13F filing for Q1 2026, filed 15 May 2026.