Artius II Acquisition Inc. - AACB

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q4 2025 · Compare: Q3 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
HGC Investment Management Inc. History No change 1,500,000 15,450 3.28% 3.72% 1 0 0.0% Q4 2025 Feb 17, 2026
AQR Arbitrage LLC History No change 1,490,205 15,349 0.32% 0.38% 2 0 0.0% Q4 2025 Feb 17, 2026
GLAZER CAPITAL, LLC History Reduced 1,155,161 11,898 0.31% 0.41% 3 -39,731 -3.33% Q4 2025 Feb 13, 2026
LINDEN ADVISORS LP History No change 1,000,000 10,300 0.06% 0.07% 4 0 0.0% Q4 2025 Feb 17, 2026
Westchester Capital Management, LLC History No change 995,939 10,258 0.43% 0.46% 5 0 0.0% Q4 2025 Feb 13, 2026
Alberta Investment Management Corp History No change 980,000 10,094 0.06% 0.07% 6 0 0.0% Q4 2025 Feb 19, 2026
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND History Reduced 850,000 8,755 0.01% 0.04% 7 -1,150,000 -57.5% Q4 2025 Feb 13, 2026
Polar Asset Management Partners Inc. History New 812,332 8,367 0.11% 8 +812,332 New Q4 2025 Feb 17, 2026
PICTON MAHONEY ASSET MANAGEMENT History No change 750,000 7,725 0.06% 0.07% 9 0 0.0% Q4 2025 Feb 11, 2026
TWO SIGMA INVESTMENTS, LP History No change 725,000 7,467 0.01% 0.01% 10 0 0.0% Q4 2025 Feb 17, 2026
Radcliffe Capital Management, L.P. History Added to 667,119 6,871 0.37% 0.41% 11 +17,119 2.63% Q4 2025 Feb 17, 2026
D. E. Shaw & Co., Inc. History No change 600,000 6,180 0.0% 0.0% 12 0 0.0% Q4 2025 Feb 17, 2026
Magnetar Financial LLC History No change 600,000 6,180 0.06% 0.04% 13 0 0.0% Q4 2025 Feb 17, 2026
Hudson Bay Capital Management LP History New 550,000 5,665 0.02% 14 +550,000 New Q4 2025 Feb 13, 2026
Sculptor Capital LP History Reduced 500,000 5,150 0.05% 0.12% 15 -500,000 -50.0% Q4 2025 Feb 13, 2026
MOORE CAPITAL MANAGEMENT, LP History No change 500,000 5,150 0.07% 0.07% 16 0 0.0% Q4 2025 Feb 17, 2026
Jain Global LLC History No change 500,000 5,150 0.02% 0.02% 17 0 0.0% Q4 2025 Feb 17, 2026
HBK INVESTMENTS L P History No change 499,998 5,149 0.04% 0.06% 18 0 0.0% Q4 2025 Feb 17, 2026
Shaolin Capital Management LLC History Added to 490,000 5,047 0.16% 0.16% 19 +118,244 31.81% Q4 2025 Feb 17, 2026
GOLDMAN SACHS GROUP INC History Added to 462,806 4,766 0.0% 0.0% 20 +11 0.0% Q4 2025 Mar 25, 2026
PERISCOPE CAPITAL INC. History Added to 450,000 4,635 0.53% 0.7% 21 +17,200 3.97% Q4 2025 Feb 10, 2026
MANGROVE PARTNERS IM, LLC History Reduced 449,998 4,634 0.38% 0.34% 22 -2 -0.0% Q4 2025 Feb 17, 2026
LMR Partners LLP History No change 400,000 4,240 0.01% 0.02% 23 0 0.0% Q4 2025 Feb 17, 2026
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS History No change 400,000 4,120 0.02% 0.02% 24 0 0.0% Q4 2025 Feb 10, 2026
BERKLEY W R CORP History No change 396,960 4,088 0.19% 0.23% 25 0 0.0% Q4 2025 Feb 13, 2026
First Trust Capital Management L.P. History No change 380,000 3,914 0.24% 0.25% 26 0 0.0% Q4 2025 Feb 13, 2026
TORONTO DOMINION BANK History Added to 366,938 3,779 0.01% 0.0% 27 +216,938 144.63% Q4 2025 Feb 17, 2026
Verition Fund Management LLC History Added to 357,357 3,680 0.01% 0.0% 28 +301,259 537.02% Q4 2025 Feb 13, 2026
RIVERNORTH CAPITAL MANAGEMENT, LLC History Reduced 297,500 3,064 0.14% 0.17% 29 -2,372 -0.79% Q4 2025 Feb 17, 2026
Governors Lane LP History No change 250,000 2,575 0.15% 0.19% 30 0 0.0% Q4 2025 Feb 17, 2026
Schonfeld Strategic Advisors LLC History Reduced 219,394 2,259 0.01% 0.01% 31 -17,105 -7.23% Q4 2025 Feb 17, 2026
Fort Baker Capital Management LP History New 207,736 2,139 0.23% 32 +207,736 New Q4 2025 Feb 17, 2026
MILLENNIUM MANAGEMENT LLC History No change 200,000 2,060 0.0% 0.0% 33 0 0.0% Q4 2025 Feb 17, 2026
GRITSTONE ASSET MANAGEMENT LLC History No change 197,656 2,035 1.94% 2.07% 34 0 0.0% Q4 2025 Jan 23, 2026
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) History No change 160,000 1,648 2.28% 0.26% 35 0 0.0% Q4 2025 Mar 04, 2026
MIZUHO SECURITIES USA LLC History Added to 152,018 1,543 0.03% 0.03% 36 +2,000 1.33% Q4 2025 Feb 09, 2026
DLD Asset Management, LP History Added to 140,894 1,451 0.11% 0.03% 37 +100,000 244.53% Q4 2025 Feb 13, 2026
Context Capital Management, LLC History No change 112,191 1,155 0.03% 0.04% 38 0 0.0% Q4 2025 Feb 13, 2026
Quarry LP History New 110,500 1,138 0.18% 39 +110,500 New Q4 2025 Feb 13, 2026
Centiva Capital, LP History No change 100,000 1,030 0.01% 0.01% 40 0 0.0% Q4 2025 Feb 13, 2026
Clear Street Group Inc. History Added to 87,611 917 0.0% 0.0% 41 +4,485 5.4% Q4 2025 Feb 13, 2026
L1 Global Manager Pty Ltd History New 75,000 772 0.51% 42 +75,000 New Q4 2025 Feb 13, 2026
METEORA CAPITAL, LLC History New 70,773 728 0.06% 43 +70,773 New Q4 2025 Feb 17, 2026
WOLVERINE ASSET MANAGEMENT LLC History Reduced 53,157 547 0.0% 0.0% 44 -13,471 -20.22% Q4 2025 Feb 02, 2026
BOOTHBAY FUND MANAGEMENT, LLC History Reduced 45,316 466 0.01% 0.01% 45 -30,000 -39.83% Q4 2025 Feb 17, 2026
ABC ARBITRAGE SA History New 20,000 206 0.02% 46 +20,000 New Q4 2025 Feb 04, 2026
FNY Investment Advisers, LLC History Reduced 212 2 0.0% 0.0% 47 -110 -34.16% Q4 2025 Jan 16, 2026
Virtu Financial LLC History Closed out 0 0 0.01% -13,112 -100.0% Q3 2025 Nov 14, 2025
UBS Group AG History Reduced 73 0 0.0% -165 -69.33% Q4 2025 Jan 29, 2026
MORGAN STANLEY History Added to 93 0 +15 19.23% Q4 2025 Feb 13, 2026