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GPAT

GP-Act III Acquisition Corp
GPAT

51 hedge funds and large institutions have $288M invested in GP-Act III Acquisition Corp in 2026 Q1 according to their latest regulatory filings, with 5 funds opening new positions, 7 increasing their positions, 17 reducing their positions, and 5 closing their positions.

New
Increased
Maintained
Reduced
Closed

0% more first-time investments, than exits

New positions opened: 5 | Existing positions closed: 5

2% less funds holding

Funds holding: 52 → 51 (-1)

6% less capital invested

Capital invested by funds: $306M → $288M (-$17.9M)

7.09% less ownership

Funds ownership: 99.45% → 92.36% (-7.1%)

33% less funds holding in top 10

Funds holding in top 10: 3 → 2 (-1)

59% less repeat investments, than reductions

Existing positions increased: 7 | Existing positions reduced: 17

Holders
51
Holders Change
-1
Holders Change %
-1.92%
% of All Funds
0.63%
Holding in Top 10
2
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-33.33%
% of All Funds
0.02%
New
5
Increased
7
Reduced
17
Closed
5
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
WRBC
W.R. Berkley Corp
Connecticut
+$5.75M
2
JP Morgan Chase
JP Morgan Chase
New York
+$5.38M
3
HCM
Highbridge Capital Management
New York
+$4.87M
4
Toronto Dominion Bank
Toronto Dominion Bank
Ontario, Canada
+$2.53M
5
SAMU
SONA Asset Management (US)
New York
+$2.15M

Top Sellers

Rank Fund Capital Flow
1
HIM
HGC Investment Management
Ontario, Canada
-$14.8M
2
PMAM
Picton Mahoney Asset Management
Ontario, Canada
-$5.38M
3
WCMNY
Westchester Capital Management (New York)
New York
-$5.38M
4
COPPSERS
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
-$3.86M
5
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
-$3.17M
Name Holding Trade Value Shares
Change 		Change in
Stake
KIM
1
Karpus Investment Management
New York
$24.2M -$1.09M -101,650 -4%
FTCM
2
First Trust Capital Management
Illinois
$22.7M – – –
AIMCA
3
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
$17.6M – – –
AA
4
AQR Arbitrage
Connecticut
$17.1M +$7.36K +684 +0%
D.E. Shaw & Co
5
D.E. Shaw & Co
New York
$15.4M – – –
PMAM
6
Picton Mahoney Asset Management
Ontario, Canada
$14.9M -$5.38M -500,000 -27%
MI
7
MMCAP International
Cayman Islands
$13.8M – – –
LP
8
LMR Partners
United Kingdom
$13.3M – – –
PAMP
9
Polar Asset Management Partners
Ontario, Canada
$12.7M – – –
WC
10
Wealthspring Capital
New York
$10.9M -$122K -11,343 -1%
WCMNY
11
Westchester Capital Management (New York)
New York
$9.33M -$5.38M -500,000 -37%
WRBC
12
W.R. Berkley Corp
Connecticut
$9.18M +$5.75M +534,533 +171%
LA
13
Linden Advisors
New York
$8.65M – – –
TCM
14
Tenor Capital Management
New York
$8.13M – – –
WAM
15
Wolverine Asset Management
Illinois
$8.08M -$2.22M -206,309 -22%
Toronto Dominion Bank
16
Toronto Dominion Bank
Ontario, Canada
$6.89M +$2.53M +235,465 +59%
Two Sigma Investments
17
Two Sigma Investments
New York
$6.78M – – –
RCM
18
Radcliffe Capital Management
Pennsylvania
$6.76M +$539K +50,045 +9%
LGM
19
L1 Global Manager
$6.15M – – –
JP Morgan Chase
20
JP Morgan Chase
New York
$5.95M +$5.38M +500,082 +1,004%
AC
21
Aristeia Capital
Connecticut
$5.32M – – –
HCM
22
Highbridge Capital Management
New York
$4.89M +$4.87M +452,072 New
HCM
23
Heights Capital Management
California
$4.21M -$295K -27,377 -7%
RCM
24
Rivernorth Capital Management
Florida
$3.9M -$647K -60,098 -14%
MC
25
Meteora Capital
Florida
$3.73M -$700K -64,997 -16%
1
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GPAT Hedge Fund Activity: Q1 2026 in Review

51 of the 8,127 institutional investors tracked by Wall St. Rank reported a position in GP-Act III Acquisition Corp (GPAT) for Q1 2026, worth a combined $288M — down 5.8% from $306M a quarter earlier.

Fund positioning in GPAT was balanced in Q1 2026: 5 funds opened new positions, 5 closed out, 7 added to existing stakes and 17 trimmed.

The largest buyer was W.R. Berkley Corp, adding an estimated $5.75M. The largest seller was HGC Investment Management, exiting entirely with an estimated $14.8M sold.

  • 51 institutional investors held GP-Act III Acquisition Corp (GPAT) as of Q1 2026, down from 52 in Q4 2025.
  • Funds reported $288M of GP-Act III Acquisition Corp stock for Q1 2026, down 5.8% quarter-over-quarter.
  • 5 funds opened new GP-Act III Acquisition Corp positions in Q1 2026 and 5 closed out, a net change of 0 holders.
  • The largest GP-Act III Acquisition Corp buyer in Q1 2026 was W.R. Berkley Corp, an estimated $5.75M added.
  • The largest GP-Act III Acquisition Corp seller in Q1 2026 was HGC Investment Management, an estimated $14.8M sold.

Based on aggregated 13F filings for Q1 2026.