Artius II AcquisitionAACBRPreferred / convertible

13F holders, Q3 2025 (September 30)
35holders +3
4new positions
1sold out
1famous investor
$0.25avg. 13F price*

At the end of Q3 2025, 35 institutions reported holding Artius II Acquisition Inc. (AACBR) in their 13F filings, up 3 from Q2 2025. 4 opened new positions and 1 sold out. The largest holders were Healthcare of Ontario Pension Plan Trust Fund ($480K), AQR Arbitrage LLC ($475K) and Sculptor Capital LP ($455K). One famous investor held it Israel Englander ( of Millennium Management's portfolio).

Company
Artius II Acquisition Inc.
CUSIP
G0509J123
Latest filing quarter
Q2 2026

History

Number of 13F holders

010203040 Q2 2025: 32Q2 2025Q3 2025: 35Q3 2025Q4 2025: 34Q4 2025Q1 2026: 34Q1 2026Q2 2026: 33Q2 2026

Total Exit/New Position Q2 2025 → Q3 2025

InstitutionsTotal Value
New Positions4$685K
Exits1$18K

All 13F filers, Q2 2025 → Q3 2025: 2,142,577 shares bought and 513,251 shares sold, net +1,629,326 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.

Ownership 35 holders
Healthcare of Ontario Pension Plan Trust Fund — No change 2,000,000 $480K
AQR Arbitrage LLC — No change 1,980,000 $475K
Sculptor Capital LP — No change 1,980,000 $455K
Polar Asset Management Partners Inc. — No change 1,500,000 $360K
HGC Investment Management Inc. — New 1,500,000 $360K
Linden Advisors LP — No change 1,375,000 $309K
Radcliffe Capital Management, L.P. — New 25,006 $254K
Toronto Dominion Bank — Add +6.7% 1,008,800 $242K
Alberta Investment Management Corp — No change 980,000 $235K
Shaolin Capital Management LLC — Reduce -11.8% 750,000 $180K
Millennium Management — Add +40.0% 700,000 $168K
Magnetar Financial LLC — No change 600,000 $144K
Harraden Circle Investments, LLC — No change 523,500 $126K
HBK Investments L P — No change 500,000 $120K
Moore Capital Management, LP — No change 500,000 $120K
Picton Mahoney Asset Management — No change 500,000 $116K
Glazer Capital, LLC — Reduce -35.2% 499,766 $110K
Commonwealth of Pennsylvania Public School Empls Retrmt SYS — No change 398,909 $96K
Decagon Asset Management LLP — Add +1.4% 355,203 $85K
Alpine Global Management, LLC — No change 330,002 $73K
Rivernorth Capital Management, LLC — New 299,872 $66K
Schonfeld Strategic Advisors LLC — Reduce -13.7% 248,327 $57K
Clear Street Group Inc. — — 229,588 $55K
Meteora Capital, LLC — Reduce 0.0% 232,790 $51K
Gritstone Asset Management LLC — Reduce -1.2% 197,655 $47K
Periscope Capital Inc. — No change 175,000 $40K
Context Capital Management, LLC — No change 162,191 $37K
Verition Fund Management LLC — Add +17.8% 145,005 $35K
Atw Spac Management LLC — No change 125,316 $30K
Boothbay Fund Management, LLC — No change 125,316 $29K
Berkley W R Corp. — No change 124,050 $27K
K2 Principal Fund, L.P. — No change 112,006 $25K
Centiva Capital, LP — No change 100,000 $24K
Parallax Volatility Advisers, L.P. — Add +8.1% 38,365 $9K
StoneX Group Inc. — New 25,000 $6K

"% of holder's portfolio" is AACBR's weight in each manager's 13F, not the share of Artius II Acquisition Inc. the manager owns.