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Disclosery

AACB ARTIUS II ACQUISITION INC

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SHS CL A (common)

47 managers (47 13F filers) reported a position in AACB shares at 2025-12-31, 20,880,226 shares in all. 5 filers opened a position and 1 filer sold out during the quarter.

Managers
47
13F filers
47
New
5
Added
9
Reduced
10
Sold out
1
Shares held by filers
20,880,226

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
HGC Investment Management Inc.1,500,000$15.4M3.28%013F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC1,490,205$15.3M0.32%013F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC1,155,161$11.9M0.31%-39,73113F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP1,000,000$10.3M0.06%013F-HRTimelineGroup
Westchester Capital Management, LLCin group Westchester Capital Managemen…995,939$10.3M0.48%013F-HRTimelineGroup
Alberta Investment Management Corp980,000$10.1M0.06%013F-HR/ATimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…850,000$8.76M0.01%-1,150,00013F-HRTimeline
Polar Asset Management Partners Inc.812,332$8.37M0.17%-187,66813F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT750,000$7.72M0.08%013F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP725,000$7.47M0.01%013F-HRTimelineGroup
Radcliffe Capital Management, L.P.667,119$6.87M0.37%+17,11913F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.600,000$6.18M<0.01%013F-HRTimelineGroup
Magnetar Financial LLCin group Magnetar Financial LLC600,000$6.18M0.06%013F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…550,000$5.67M0.03%new13F-HRTimelineGroup
Sculptor Capital LPin group Sculptor Capital LP500,000$5.15M0.06%-500,00013F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP500,000$5.15M0.1%013F-HRTimeline
Jain Global LLC500,000$5.15M0.05%013F-HRTimeline
HBK INVESTMENTS L P499,998$5.15M0.06%013F-HRTimeline
Shaolin Capital Management LLC490,000$5.05M0.19%+118,24413F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC462,806$4.77M<0.01%+1113F-HR/ATimelineGroup
Periscope Capital Inc.450,000$4.63M0.9%+17,20013F-HRTimeline
MANGROVE PARTNERS IM, LLC449,998$4.63M0.38%-213F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…400,000$4.12M0.02%013F-HRTimeline
BERKLEY W R CORP396,960$4.09M0.23%013F-HRTimeline
First Trust Capital Management L.P.in group FIRST TRUST ADVISORS LP380,000$3.91M0.24%013F-HRTimelineGroup
TORONTO DOMINION BANKin group TORONTO DOMINION BANK366,938$3.78M0.01%+216,93813F-HRTimelineGroup
Verition Fund Management LLC357,357$3.68M0.02%+301,25913F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC297,500$3.06M0.14%-2,37213F-HRTimeline
Governors Lane LP250,000$2.58M0.24%013F-HRTimeline
Schonfeld Strategic Advisors LLC219,394$2.26M0.01%-17,10513F-HRTimeline
Fort Baker Capital Management LP207,736$2.14M0.24%new13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC200,000$2.06M<0.01%013F-HRTimelineGroup
GRITSTONE ASSET MANAGEMENT LLC197,656$2.04M1.94%013F-HRTimeline
OCONNOR, A Distinct Business Unit of UB…160,000$1.65M0.04%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC152,018$1.54M0.03%+2,00013F-HRTimelineGroup
DLD Asset Management, LP140,894$1.45M0.15%+100,00013F-HRTimeline
Context Capital Management, LLC112,191$1.16M0.03%013F-HRTimeline
Quarry LP110,500$1.14M0.19%new13F-HRTimeline
Centiva Capital, LP100,000$1.03M0.06%013F-HRTimeline
L1 Global Manager Pty Ltd75,000$772K0.51%13F-HRTimeline
Meteora Capital, LLC70,773$729K0.06%new13F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC53,157$548K0.01%-13,47113F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC45,316$467K0.01%-30,00013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.37,973$391K<0.01%013F-HRTimelineGroup
ABC ARBITRAGE SAin group ABC ARBITRAGE SA20,000$206K0.02%new13F-HRTimelineGroup
FNY Investment Advisers, LLC212$2K<0.01%-11013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY93$958<0.01%+1513F-HR/ATimelineGroup