GP-Act III Acquisition Corp. (GPAT) — Institutional Holders, Q2 2026
43 institutional investment managers reported a GPAT position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $99.6M. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
GPAT in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
None this quarter.
Biggest sellers
- Karpus ManagementSold out · -2,230,216 sh-$3.8M
- First Capital Management L.P.Sold out · -2,091,077 sh-$3.5M
- D. E. ShawSold out · -1,423,125 sh-$2.4M
- PICTON MAHONEY ASSET MANAGEMENTTrimmed · -1,125,000 sh-$1.9M
- Westchester Capital ManagementSold out · -860,852 sh-$1.5M
GPAT 13F holders ranked 1–43 of 43
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | Polar Asset Management Partners#1 · 3,037,500 sh | 3,037,500 | $19.8M | 0.33% | +25.9% |
| 2 | AQR Arbitrage#2 · 1,858,963 sh | 1,858,963 | $15.3M | 0.22% | -8.6% |
| 3 | MMCAP International SPC#3 · 2,312,500 sh | 2,312,500 | $14.1M | 1.19% | 0.0% |
| 4 | Alberta Investment Management#4 · 1,812,500 sh | 1,812,500 | $11.0M | 0.06% | -25.6% |
| 5 | MIZUHO SECURITIES USA#5 · 618,584 sh | 618,584 | $6.7M | 0.07% | +929.3% |
| 6 | BERKLEY W R#6 · 497,064 sh | 497,064 | $5.4M | 0.26% | -41.3% |
| 7 | Verition Fund Management#7 · 624,285 sh | 624,285 | $4.4M | <0.01% | +37.8% |
| 8 | HGC Investment Management#8 · 399,387 sh | 399,387 | $4.3M | 0.86% | New |
| 9 | TORONTO DOMINION BANK#9 · 827,005 sh | 827,005 | $3.8M | <0.01% | -25.6% |
| 10 | DEUTSCHE BANK AG\#10 · 290,000 sh | 290,000 | $3.1M | <0.01% | 0.0% |
| 11 | PICTON MAHONEY ASSET MANAGEMENT#11 · 1,187,500 sh | 1,187,500 | $2.9M | 0.02% | -48.6% |
| 12 | HEALTHCARE OF ONTARIO PENSION PLAN FUND#12 · 1,087,450 sh | 1,087,450 | $1.8M | <0.01% | +16.0% |
| 13 | PERISCOPE CAPITAL#13 · 360,700 sh | 360,700 | $1.7M | 0.15% | -21.7% |
| 14 | JPMORGAN CHASE#14 · 99,860 sh | 99,860 | $1.1M | <0.01% | -81.8% |
| 15 | Lineage Point Capital#15 · 640,272 sh | 640,272 | $825.3K | 0.17% | +11.9% |
| 16 | MOORE CAPITAL MANAGEMENT#16 · 150,000 sh | 150,000 | $562.5K | <0.01% | -50.0% |
| 17 | Kepos Capital#17 · 42,500 sh | 42,500 | $470.0K | 0.64% | 0.0% |
| 18 | Clear Street Group#18 · 224,474 sh | 224,474 | $318.7K | <0.01% | +0.3% |
| 19 | Harraden Circle Investments#19 · 1,520,737 sh | 1,520,737 | $288.9K | 0.04% | 0.0% |
| 20 | GEODE CAPITAL MANAGEMENT#20 · 21,362 sh | 21,362 | $232.6K | 0.00% | +87.5% |
| 21 | CITADEL ADVISORS#21 · 20,039 sh | 20,039 | $218.2K | 0.00% | +16.7% |
| 22 | HRT FINANCIAL#22 · 14,965 sh | 14,965 | $162.0K | <0.01% | New |
| 23 | Wealthspring Capital#23 · 759,264 sh | 759,264 | $144.3K | 0.03% | -57.1% |
| 24 | LMR Partners LLP#24 · 612,500 sh | 612,500 | $116.4K | <0.01% | -66.7% |
| 25 | LINDEN ADVISORS#25 · 360,400 sh | 360,400 | $86.5K | <0.01% | -68.9% |
| 26 | LONGFELLOW INVESTMENT MANAGEMENT#26 · 11,700 sh | 11,700 | $85.5K | 0.02% | 0.0% |
| 27 | CSS#27 · 441,672 sh | 441,672 | $83.9K | <0.01% | 0.0% |
| 28 | ARISTEIA CAPITAL, L.L.C.#28 · 245,375 sh | 245,375 | $58.9K | <0.01% | -66.7% |
| 29 | Shaolin Capital Management#29 · 294,650 sh | 294,650 | $56.0K | <0.01% | -41.0% |
| 30 | Lepercq De Neuflize Asset Management#30 · 250,000 sh | 250,000 | $47.5K | 0.03% | +66.7% |
| 31 | Saba Capital Management, L.P.#31 · 193,229 sh | 193,229 | $46.4K | <0.01% | 0.0% |
| 32 | RIVERNORTH CAPITAL MANAGEMENT#32 · 225,599 sh | 225,599 | $43.9K | <0.01% | -61.5% |
| 33 | UBS Group AG#33 · 3,988 sh | 3,988 | $43.8K | 0.00% | -4.0% |
| 34 | GRITSTONE ASSET MANAGEMENT#34 · 217,248 sh | 217,248 | $41.3K | — | 0.0% |
| 35 | METEORA CAPITAL#35 · 200,000 sh | 200,000 | $38.0K | <0.01% | -65.6% |
| 36 | L1 Global Manager Pty Ltd#36 · 110,325 sh | 110,325 | $21.0K | 0.01% | -80.6% |
| 37 | DLD Asset Management#37 · 90,500 sh | 90,500 | $17.2K | <0.01% | 0.0% |
| 38 | BNP PARIBAS FINANCIAL MARKETS#38 · 30,923 sh | 30,923 | $5.9K | 0.00% | 0.0% |
| 39 | SRS Capital Advisors#39 · 22,600 sh | 22,600 | $4.3K | 0.00% | New |
| 40 | Schonfeld Strategic Advisors#40 · 17,743 sh | 17,743 | $3.4K | 0.00% | +77.4% |
| 41 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#41 · 17,600 sh | 17,600 | $3.3K | 0.00% | -2.8% |
| 42 | Radcliffe Capital Management, L.P.#42 · 13,070 sh | 13,070 | $3.1K | <0.01% | -97.9% |
| 43 | MORGAN STANLEY#43 · 23 sh | 23 | $250.00 | 0.00% | -64.1% |
Funds that sold out of GPAT in Q2 2026 (24)
Held GPAT at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| Karpus Management2,230,216 sh | 2,230,216 | $24.2M |
| First Capital Management L.P.2,091,077 sh | 2,091,077 | $22.7M |
| D. E. Shaw1,423,125 sh | 1,423,125 | $15.4M |
| Westchester Capital Management860,852 sh | 860,852 | $9.3M |
| TENOR CAPITAL MANAGEMENT , L.P.750,000 sh | 750,000 | $8.1M |
| WOLVERINE ASSET MANAGEMENT745,440 sh | 745,440 | $8.1M |
| TWO SIGMA INVESTMENTS625,000 sh | 625,000 | $6.8M |
| HIGHBRIDGE CAPITAL MANAGEMENT452,072 sh | 452,072 | $4.9M |
| HEIGHTS CAPITAL MANAGEMENT388,719 sh | 388,719 | $4.2M |
| O'Connor Alternative Investments250,000 sh | 250,000 | $2.7M |
| Jain Global249,980 sh | 249,980 | $2.7M |
| GLAZER CAPITAL236,227 sh | 236,227 | $2.6M |
| SONA ASSET MANAGEMENT (US)200,000 sh | 200,000 | $2.2M |
| GOLDMAN SACHS GROUP137,739 sh | 137,739 | $1.5M |
| PNC FINANCIAL SERVICES GROUP80,000 sh | 80,000 | $867.2K |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS53,900 sh | 53,900 | $584.3K |
| Dakota Wealth Management46,400 sh | 46,400 | $503.0K |
| ROBINSON CAPITAL MANAGEMENT22,250 sh | 22,250 | $240.1K |
| Wellspring Financial Advisors21,200 sh | 21,200 | $229.8K |
| Cannon Global Investment Management16,700 sh | 16,700 | $181.0K |
| TrueMark Investments16,017 sh | 16,017 | $173.6K |
| K2 PRINCIPAL FUND, L.P.121,798 sh | 121,798 | $17.1K |
| ROYAL BANK OF CANADA900 sh | 900 | $10.0K |
| NATIONAL BANK OF CANADA109 sh | 109 | $1.2K |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.