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 Q2	–	Sell	-860,852	Closed	-$9.33M	–	334
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

PAMP

Polar Asset Management Partners Toronto, Ontario, Canada $6.07B AUM 34.81% 1-Year Est. Return

AQR Arbitrage Greenwich, Connecticut $7.02B AUM 31.58% 1-Year Est. Return

MMCAP International Grand Cayman, Cayman Islands $1.18B AUM 50.44% 1-Year Est. Return

AIMCA

Alberta Investment Management Corp (AIMCo) Edmonton, Alberta, Canada $17.9B AUM 27.56% 1-Year Est. Return

MSU

Mizuho Securities USA New York $6.2B AUM 35.46% 1-Year Est. Return

WRBC

W.R. Berkley Corp Greenwich, Connecticut $2.18B AUM 13.58% 1-Year Est. Return

Verition Fund Management Greenwich, Connecticut $19.7B AUM 39.39% 1-Year Est. Return

HIM

HGC Investment Management Toronto, Ontario, Canada $507M AUM 6.15% 1-Year Est. Return

Toronto Dominion Bank Toronto, Ontario, Ontario, Canada $86.4B AUM 59.51% 1-Year Est. Return

Deutsche Bank Frankfurt Am Main Ge, Germany $344B AUM 42.99% 1-Year Est. Return

Westchester Capital Management (New York)'s GPAT Position: Q2 2026 in Review

Westchester Capital Management (New York) sold out of GP-Act III Acquisition Corp (GPAT) in Q2 2026, closing a stake of 860,852 shares — an estimated $9.33M sold.

Westchester Capital Management (New York) first reported a position in GPAT in Q3 2024 and held it in 7 quarters. The position peaked at $14.6M in Q4 2025. 24 funds tracked by Wall St. Rank hold GPAT as of Q2 2026.

Westchester Capital Management (New York) reported no remaining GP-Act III Acquisition Corp position as of Q2 2026 after selling out during the quarter.
Westchester Capital Management (New York) sold 860,852 GP-Act III Acquisition Corp shares in Q2 2026, an estimated $9.33M.
Westchester Capital Management (New York) first reported a position in GP-Act III Acquisition Corp in Q3 2024 and held it in 7 quarters.
Westchester Capital Management (New York)'s GP-Act III Acquisition Corp position peaked at $14.6M in Q4 2025.
24 funds tracked by Wall St. Rank held GP-Act III Acquisition Corp as of Q2 2026.

Based on Westchester Capital Management (New York)'s 13F filing for Q2 2026, filed 14 Aug 2026.