Artius II AcquisitionAACBRPreferred / convertible
13F holders, Q4 2025 (December 31)34holders −1
2new positions
2sold out
1famous investor
$0.33avg. 13F price*
At the end of Q4 2025, 34 institutions reported holding Artius II Acquisition Inc. (AACBR) in their 13F filings, down 1 from Q3 2025. 2 opened new positions and 2 sold out. The largest holders were Healthcare of Ontario Pension Plan Trust Fund ($740K), Sculptor Capital LP ($653K) and AQR Arbitrage LLC ($501K). 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
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $183K |
| Exits | 2 | $94K |
All 13F filers, Q3 2025 → Q4 2025: 1,967,959 shares bought and 1,647,300 shares sold, net +320,659 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 34 holders
| Healthcare of Ontario Pension Plan Trust Fund | — | No change | 2,000,000 | $740K |
| Sculptor Capital LP | — | No change | 1,980,000 | $653K |
| AQR Arbitrage LLC | — | Reduce -23.4% | 1,517,205 | $501K |
| Polar Asset Management Partners Inc. | — | No change | 1,500,000 | $495K |
| HGC Investment Management Inc. | — | No change | 1,500,000 | $495K |
| Harraden Circle Investments, LLC | — | Add +163.4% | 1,378,703 | $455K |
| Linden Advisors LP | — | No change | 1,375,000 | $454K |
| Alberta Investment Management Corp | — | No change | 980,000 | $323K |
| Millennium Management | — | No change | 700,000 | $231K |
| Shaolin Capital Management LLC | — | Reduce -13.3% | 650,000 | $215K |
| Toronto Dominion Bank | — | Reduce -39.2% | 613,561 | $202K |
| Magnetar Financial LLC | — | No change | 600,000 | $198K |
| HBK Investments L P | — | No change | 500,000 | $185K |
| Meteora Capital, LLC | — | Add +133.3% | 543,109 | $174K |
| Moore Capital Management, LP | — | No change | 500,000 | $165K |
| Picton Mahoney Asset Management | — | No change | 500,000 | $165K |
| BNP Paribas Financial Markets | — | New | 462,795 | $148K |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | — | Reduce -8.7% | 364,209 | $120K |
| Alpine Global Management, LLC | — | No change | 330,002 | $106K |
| Glazer Capital, LLC | — | Reduce -35.0% | 325,000 | $104K |
| Rivernorth Capital Management, LLC | — | No change | 299,872 | $96K |
| Radcliffe Capital Management, L.P. | — | Add +900.0% | 250,059 | $83K |
| Clear Street Group Inc. | — | Reduce -0.9% | 227,588 | $75K |
| Gritstone Asset Management LLC | — | No change | 197,655 | $65K |
| Periscope Capital Inc. | — | No change | 175,000 | $58K |
| Schonfeld Strategic Advisors LLC | — | Reduce -33.9% | 164,095 | $54K |
| Verition Fund Management LLC | — | No change | 145,005 | $54K |
| Context Capital Management, LLC | — | No change | 162,191 | $54K |
| Boothbay Fund Management, LLC | — | No change | 125,316 | $41K |
| Berkley W R Corp. | — | No change | 124,050 | $40K |
| Centiva Capital, LP | — | No change | 100,000 | $37K |
| K2 Principal Fund, L.P. | — | No change | 112,006 | $37K |
| DLD Asset Management, LP | — | New | 106,713 | $35K |
| StoneX Group Inc. | — | Add +31.5% | 32,876 | $11K |
"% of holder's portfolio" is AACBR's weight in each manager's 13F, not the share of Artius II Acquisition Inc. the manager owns.