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Disclosery

AACB ARTIUS II ACQUISITION INC

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SHS CL A (common)

43 managers (43 13F filers) reported a position in AACB shares at 2025-09-30, 21,102,318 shares in all. 5 filers opened a position and 3 filers sold out during the quarter.

Managers
43
13F filers
43
New
5
Added
6
Reduced
11
Sold out
3
Shares held by filers
21,102,318

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, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, 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
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…2,000,000$20.3M0.04%013F-HRTimeline
HGC Investment Management Inc.1,500,000$15.3M3.72%new13F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC1,490,205$15.1M0.38%-12,00013F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC1,194,892$12.1M0.41%-2313F-HRTimelineGroup
Sculptor Capital LPin group Sculptor Capital LP1,000,000$10.2M0.14%-400,00013F-HRTimelineGroup
Polar Asset Management Partners Inc.1,000,000$10.2M0.21%013F-HR/ATimeline
Linden Advisors LPin group Linden Advisors LP1,000,000$10.1M0.07%013F-HRTimelineGroup
Westchester Capital Management, LLCin group Westchester Capital Managemen…995,939$10.1M0.52%013F-HRTimelineGroup
Alberta Investment Management Corp980,000$9.93M0.07%013F-HR/ATimeline
PICTON MAHONEY ASSET MANAGEMENT750,000$7.61M0.1%013F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP725,000$7.34M0.01%013F-HRTimelineGroup
Radcliffe Capital Management, L.P.650,000$6.6M0.41%+381,99813F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.600,000$6.08M<0.01%013F-HRTimelineGroup
Magnetar Financial LLCin group Magnetar Financial LLC600,000$6.08M0.04%013F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP500,000$5.09M0.1%013F-HRTimeline
HBK INVESTMENTS L P499,998$5.09M0.08%-213F-HRTimeline
Jain Global LLC500,000$5.07M0.07%013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC462,795$4.69M<0.01%013F-HRTimelineGroup
MANGROVE PARTNERS IM, LLC450,000$4.58M0.34%new13F-HRTimeline
Periscope Capital Inc.432,800$4.39M1.07%+204,40013F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…400,000$4.05M0.02%013F-HRTimeline
BERKLEY W R CORP396,960$4.02M0.26%013F-HRTimeline
First Trust Capital Management L.P.in group FIRST TRUST ADVISORS LP380,000$3.87M0.25%013F-HRTimelineGroup
Shaolin Capital Management LLC371,756$3.78M0.18%+221,75613F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC299,872$3.04M0.17%new13F-HRTimeline
Governors Lane LP250,000$2.54M0.35%013F-HRTimeline
Schonfeld Strategic Advisors LLC236,499$2.4M0.02%-3,50113F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC200,000$2.04M<0.01%new13F-HRTimelineGroup
GRITSTONE ASSET MANAGEMENT LLC197,656$2.01M2.07%-2,34413F-HRTimeline
OCONNOR, A Distinct Business Unit of UB…160,000$1.62M0.05%013F-HR/ATimelineThe filing omitted confidential holdings, a later amendment may add them.
TORONTO DOMINION BANKin group TORONTO DOMINION BANK150,000$1.53M<0.01%-212,01513F-HRTimelineGroup
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC150,018$1.5M0.03%013F-HRTimelineGroup
Context Capital Management, LLC112,191$1.14M0.04%-50,00013F-HRTimeline
Centiva Capital, LP100,000$1.01M0.09%013F-HRTimeline
ATW SPAC MANAGEMENT LLC75,316$767K0.97%-50,00013F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC75,316$764K0.02%-50,00013F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC66,628$675K0.01%+3,07013F-HRTimelineGroup
Verition Fund Management LLC56,098$568K<0.01%new13F-HRTimeline
DLD Asset Management, LP40,894$416K0.05%013F-HR/ATimeline
Clear Street Group Inc.in group Clear Street Group Inc.37,973$387K<0.01%13F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC13,112$133K0.01%-7,02713F-HRTimelineGroup
FNY Investment Advisers, LLC322$3K<0.01%+22013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY78$790<0.01%+1513F-HR/ATimelineGroup