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Disclosery

AACB ARTIUS II ACQUISITION INC

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SHS CL A (common)

52 managers (52 13F filers) reported a position in AACB shares at 2026-03-31, 21,265,554 shares in all. 4 filers opened a position and 0 filers sold out during the quarter.

Managers
52
13F filers
52
New
4
Added
7
Reduced
13
Sold out
0
Shares held by filers
21,265,554

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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$15.5M3.44%013F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC1,432,183$14.8M0.24%-58,02213F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC1,295,029$13.4M0.28%+139,86813F-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$10.3M0.5%013F-HRTimelineGroup
Alberta Investment Management Corp980,000$10.1M0.06%013F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…850,000$8.78M0.01%013F-HRTimeline
Polar Asset Management Partners Inc.800,000$8.27M0.2%-12,33213F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT750,000$7.75M0.08%013F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP725,000$7.5M0.01%013F-HRTimelineGroup
Radcliffe Capital Management, L.P.678,671$7.02M0.53%+11,55213F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC600,000$6.2M0.06%013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.600,000$6.2M<0.01%013F-HRTimelineGroup
Shaolin Capital Management LLC550,000$5.69M0.24%+60,00013F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…550,000$5.68M0.03%013F-HRTimelineGroup
Sculptor Capital LPin group Sculptor Capital LP500,000$5.17M0.06%013F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP500,000$5.17M0.19%013F-HRTimeline
HBK INVESTMENTS L P499,998$5.17M0.07%013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC462,806$4.79M<0.01%013F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…398,075$4.11M0.02%-1,92513F-HRTimeline
BERKLEY W R CORP396,960$4.1M0.22%013F-HRTimeline
First Trust Capital Management L.P.in group FIRST TRUST ADVISORS LP380,000$3.93M0.21%013F-HRTimelineGroup
Periscope Capital Inc.375,000$3.88M0.68%-75,00013F-HRTimeline
Jain Global LLC366,849$3.79M0.05%-133,15113F-HRTimeline
MANGROVE PARTNERS IM, LLC356,172$3.68M0.3%-93,82613F-HRTimeline
Verition Fund Management LLC354,691$3.66M0.04%-2,66613F-HRTimeline
RLH Capital LLC320,996$3.32M1.69%13F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC297,500$3.08M0.16%013F-HRTimeline
Governors Lane LP250,000$2.58M0.32%013F-HRTimeline
Schonfeld Strategic Advisors LLC245,631$2.54M0.02%+26,23713F-HRTimeline
Fort Baker Capital Management LP232,736$2.41M0.21%+25,00013F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK225,000$2.33M<0.01%-141,93813F-HRTimelineGroup
Quarry LP210,500$2.18M0.44%+100,00013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC200,000$2.07M<0.01%013F-HRTimelineGroup
GRITSTONE ASSET MANAGEMENT LLC197,656$2.04M2.18%013F-HRTimeline
SONA ASSET MANAGEMENT (US) LLCin group SONA ASSET MANAGEMENT (US) LLC172,874$1.79M0.07%new13F-HRTimelineGroup
O'Connor Alternative Investments LLC160,000$1.65M0.09%13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
DLD Asset Management, LP140,894$1.46M0.15%013F-HRTimeline
Context Capital Management, LLC112,191$1.16M0.03%013F-HRTimeline
Meteora Capital, LLC109,223$1.13M0.08%+38,45013F-HRTimeline
Centiva Capital, LP100,000$1.03M0.05%013F-HRTimeline
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC100,196$1.03M0.02%-51,82213F-HRTimelineGroup
L1 Global Manager Pty Ltd75,000$776K0.63%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS55,222$570K<0.01%new13F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC45,316$469K0.01%013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.36,973$382K<0.01%-1,00013F-HRTimelineGroup
Crossingbridge Advisors, LLC25,000$258K0.05%new13F-HRTimeline
ABC ARBITRAGE SAin group ABC ARBITRAGE SA20,000$207K0.03%013F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC18,464$191K0.01%new13F-HRTimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC16,626$172K<0.01%-36,53113F-HRTimelineGroup
FNY Investment Advisers, LLC112$1K<0.01%-10013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY71$734<0.01%-2213F-HRTimelineGroup