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Disclosery

AACB ARTIUS II ACQUISITION INC

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SHS CL A (common)

51 managers (51 13F filers) reported a position in AACB shares at 2026-06-30, 21,165,739 shares in all. 2 filers opened a position and 3 filers sold out during the quarter.

Managers
51
13F filers
51
New
2
Added
7
Reduced
7
Sold out
3
Shares held by filers
21,165,739

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, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, 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
HGC Investment Management Inc.1,500,000$15.7M3.11%013F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC1,440,225$15.1M0.21%+8,04213F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC1,295,130$13.6M0.34%+10113F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP1,000,000$10.5M0.05%013F-HRTimelineGroup
Westchester Capital Management, LLCin group Westchester Capital Managemen…995,939$10.4M0.52%013F-HRTimelineGroup
Alberta Investment Management Corp980,000$10.3M0.06%013F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…850,000$8.91M0.01%013F-HRTimeline
Polar Asset Management Partners Inc.800,000$8.39M0.15%013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT750,000$7.87M0.07%013F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP725,000$7.61M0.01%013F-HRTimelineGroup
Radcliffe Capital Management, L.P.678,671$7.12M0.54%013F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.600,000$6.29M<0.01%013F-HRTimelineGroup
Magnetar Financial LLCin group Magnetar Financial LLC600,000$6.29M0.06%013F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…550,000$5.76M0.03%013F-HRTimelineGroup
Sculptor Capital LPin group Sculptor Capital LP500,000$5.25M0.05%013F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP500,000$5.25M0.12%013F-HRTimeline
Governors Lane LP500,000$5.25M0.53%+250,00013F-HRTimeline
HBK INVESTMENTS L P499,998$5.24M0.06%013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC462,806$4.85M<0.01%013F-HRTimelineGroup
Periscope Capital Inc.425,000$4.46M0.71%+50,00013F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…398,075$4.17M0.02%013F-HRTimeline
BERKLEY W R CORP396,960$4.16M0.2%013F-HRTimeline
First Trust Capital Management L.P.380,000$3.99M0.23%013F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK375,190$3.94M0.01%+150,19013F-HRTimelineGroup
MANGROVE PARTNERS IM, LLC356,172$3.74M0.25%013F-HRTimeline
Shaolin Capital Management LLC351,827$3.69M0.21%-198,17313F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC297,500$3.14M0.15%013F-HRTimeline
Verition Fund Management LLC257,357$2.7M0.02%-97,33413F-HR/ATimeline
Quarry LP252,236$2.65M0.42%+41,73613F-HRTimeline
RLH Capital LLC252,236$2.65M1.27%-68,76013F-HRTimeline
Schonfeld Strategic Advisors LLC245,631$2.58M0.01%013F-HRTimeline
Jain Global LLC202,091$2.12M0.02%-164,75813F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC200,000$2.1M<0.01%013F-HRTimelineGroup
GRITSTONE ASSET MANAGEMENT LLC197,656$2.07M1.99%013F-HRTimeline
HIGHBRIDGE CAPITAL MANAGEMENT LLC177,898$1.87M0.06%new13F-HRTimeline
SONA ASSET MANAGEMENT (US) LLCin group SONA ASSET MANAGEMENT (US) LLC172,874$1.81M0.07%013F-HRTimelineGroup
O'Connor Alternative Investments LLC160,000$1.68M0.12%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
DLD Asset Management, LP140,894$1.48M0.12%013F-HRTimeline
Context Capital Management, LLC112,191$1.18M0.02%013F-HRTimeline
Meteora Capital, LLC109,226$1.15M0.1%+313F-HRTimeline
Centiva Capital, LP100,000$1.05M0.04%013F-HRTimeline
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC100,196$1.04M0.02%013F-HR/ATimelineGroup
L1 Global Manager Pty Ltd75,000$787K0.64%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS55,222$579K<0.01%013F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC45,316$475K0.01%013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.35,799$376K<0.01%-1,17413F-HRTimelineGroup
PenderFund Capital Management Ltd.32,500$341K0.04%new13F-HRTimeline
ABC ARBITRAGE SAin group ABC ARBITRAGE SA20,000$210K0.02%013F-HRTimelineGroup
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC12,760$134K<0.01%-3,86613F-HRTimelineGroup
FNY Investment Advisers, LLC112$1K<0.01%013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY51$535<0.01%-2013F-HRTimelineGroup