13FBOX
GP-ACT III ACQUISITION CORP · 13F Institutional Holdings
Options Calculator Rankings
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GP-ACT III ACQUISITION CORP

ALF
Institutions
68
Combined AUM (Q2 2026)
$442.6M
Combined Shares (Q2 2026)
52.5M
Overall Trend
Decrease
All institutions combined
Basis: holder count and combined value / shares merge all share classes of the same company (e.g. Class A / C); each institution is counted once, and value & shares are the sum across classes.
📥 Inflow (Q1 2026→Q2 2026)
+5.7M
17 institutions added · 5 new buys
Est. buy amount
📤 Outflow (Q1 2026→Q2 2026)
-48.6M
69 institutions reduced · 33 exits
Est. sell amount
⚖️ Net Share Change
-42.9M
Net Sell
💰 Est. Net Value
≈ —
est. price
Latest AUM (Q2 2026)
$442.6M
Institutions
68
New Buys
5
Adds
12
Reduces
36
Exits
33
Unchanged
15
Ownership TrendPortfolio %Prev Q %RankQ2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
Polar Asset Management Partners Inc.
1.16%1.28%#6$71.3M7.4M$63.9M6.8M+625,004+9.19%Add
AQR Arbitrage LLC
0.65%0.59%#10$45.8M4.9M$36.2M4.0M+879,707+21.83%Add
Alberta Investment Management Corp
0.21%0.27%#14$38.2M4.7M$44.6M5.3M-625,000-11.71%Reduce
Jain Global LLC
0.12%0.14%#18$30.8M2.8M$33.3M3.1M-249,980-8.07%Reduce
METEORA CAPITAL, LLC
2.55%3.8%#2$30.7M3.5M$51.5M4.8M-1.3M-27.37%Reduce
BERKLEY W R CORP
1%1.72%#8$20.9M1.9M$32.0M3.0M-1.0M-35.08%Reduce
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
0.03%#33$17.9M1.6M$00+1.6MNew Buy
Saba Capital Management, L.P.
0.45%0.47%#11$17.2M1.7M$17.1M1.7M00.00%Unchanged
LMR Partners LLP
0.06%0.09%#25$16.6M2.5M$42.9M5.0M-2.5M-49.42%Reduce
MIZUHO SECURITIES USA LLC
0.35%0.36%#13$15.3M1.4M$15.3M1.4M00.00%Unchanged
Crossingbridge Advisors, LLC
2.64%2.91%#1$15.1M1.4M$16.1M1.5M-106,228-7.10%Reduce
MMCAP International Inc. SPC
1.19%2.8%#5$14.0M1.6M$32.5M3.3M-1.7M-51.50%Reduce
Shay Capital LLC
0.7%0.9%#9$10.8M1.0M$10.7M1.0M00.00%Unchanged
LINDEN ADVISORS LP
0.06%0.11%#27$10.8M1.0M$19.4M1.8M-797,584-44.37%Reduce
Ghisallo Capital Management LLC
0.06%#26$10.0M921,000$00+921,000New Buy
BOOTHBAY FUND MANAGEMENT, LLC
0.12%0.09%#19$9.0M834,740$6.8M629,956+204,784+32.51%Add
CITADEL ADVISORS LLC
<0.01%<0.01%#54$8.5M785,816$1.4M861,239-75,423-8.76%Reduce
TORONTO DOMINION BANK
0.01%0.04%#40$7.0M954,613$27.6M2.6M-1.6M-62.96%Reduce
Context Capital Management, LLC
0.11%#22$5.4M514,510$00+514,510New Buy
HGC Investment Management Inc.
1.07%0.24%#7$5.4M499,987$1.1M100,600+399,387+397.00%Add
Verition Fund Management LLC
0.01%0.01%#43$4.4M542,596$3.5M541,538+1,058+0.20%Add
Helix Partners Management LP
0.44%#12$3.3M300,300$00+300,300New Buy
Magnetar Financial LLC
0.03%0.24%#31$3.3M1.2M$23.2M3.2M-1.9M-60.57%Reduce
RiverPark Advisors, LLC
1.46%1.2%#3$3.2M294,172$3.2M294,17200.00%Unchanged
DEUTSCHE BANK AG\
<0.01%<0.01%#55$3.1M290,000$3.1M290,00000.00%Unchanged
PICTON MAHONEY ASSET MANAGEMENT
0.02%0.26%#35$2.8M362,500$35.7M3.4M-3.1M-89.38%Reduce
Anson Funds Management LP
0.12%0.05%#20$2.0M180,180$537,00050,000+130,180+260.36%Add
Clear Street Group Inc.
<0.01%0.01%#47$1.7M188,905$1.4M161,619+27,286+16.88%Add
PERISCOPE CAPITAL INC.
0.15%0.75%#16$1.7M197,390$6.8M672,390-475,000-70.64%Reduce
MOORE CAPITAL MANAGEMENT, LP
0.02%0.07%#34$1.6M200,000$3.3M350,000-150,000-42.86%Reduce
Shaolin Capital Management LLC
0.12%0.15%#21$1.6M318,100$2.3M440,988-122,888-27.87%Reduce
WHITEBOX ADVISORS LLC
0.02%0.02%#36$1.4M205,000$1.4M205,00000.00%Unchanged
GEODE CAPITAL MANAGEMENT, LLC
<0.01%<0.01%#62$1.2M111,082$1.1M101,823+9,259+9.09%Add
MILLENNIUM MANAGEMENT LLC
<0.01%<0.01%#57$1.1M175,000$1.1M175,00000.00%Unchanged
JPMORGAN CHASE & CO
<0.01%<0.01%#63$1.1M99,860$7.0M644,511-544,651-84.51%Reduce
HRT FINANCIAL LP
<0.01%<0.01%#51$942,47386,969$761,00070,874+16,095+22.71%Add
Kepos Capital LP
1.26%1.5%#4$921,64685,000$918,00085,00000.00%Unchanged
Lineage Point Capital LP
0.15%0.17%#17$715,98564,795$704,60065,000-205-0.32%Reduce
DLD Asset Management, LP
0.04%0.06%#29$653,99160,387$644,40060,000+387+0.65%Add
Alyeska Investment Group, L.P.
<0.01%0.03%#52$588,91454,378$10.7M1.0M-945,622-94.56%Reduce
DELTEC ASSET MANAGEMENT LLC
0.08%0.3%#23$541,50050,000$1.6M150,000-100,000-66.67%Reduce
GABELLI & Co INVESTMENT ADVISERS, INC.
0.06%0.07%#24$445,46368,900$439,78768,90000.00%Unchanged
Harraden Circle Investments, LLC
0.05%1.16%#28$414,5431.0M$5.8M2.1M-1.0M-48.81%Reduce
GABELLI FUNDS LLC
<0.01%<0.01%#49$358,75553,650$354,31553,65000.00%Unchanged
HIGHBRIDGE CAPITAL MANAGEMENT LLC
0.01%0.26%#41$328,104886,768$8.1M1.6M-682,147-43.48%Reduce
ABC ARBITRAGE SA
0.04%0.04%#30$326,40030,000$322,80030,00000.00%Unchanged
TENOR CAPITAL MANAGEMENT Co., L.P.
<0.01%0.25%#48$285,539771,728$16.4M2.3M-1.5M-66.03%Reduce
SUSQUEHANNA INTERNATIONAL GROUP, LLP
<0.01%<0.01%#64$252,87370,304$617,86257,478+12,826+22.31%Add
WOLVERINE ASSET MANAGEMENT LLC
<0.01%0.18%#50$244,47622,574$18.4M1.7M-1.7M-98.67%Reduce
CSS LLC/IL
0.01%0.12%#38$242,915656,527$2.6M912,161-255,634-28.03%Reduce

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow