Artius II Acquisition Inc. Class AAACB
13F holders, Q3 2025 (September 30)At the end of Q3 2025, 43 institutions reported holding Artius II Acquisition Inc. Class A (AACB) in their 13F filings, up 2 from Q2 2025. 5 opened new positions and 3 sold out. The largest holders were Healthcare of Ontario Pension Plan Trust Fund ($20.3M), HGC Investment Management Inc. ($15.3M) and AQR Arbitrage LLC ($15.1M). 2 famous investors held it, including David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Artius II Acquisition Inc. Class A
- CUSIP
- G0509J115
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 5 | $25.5M |
| Exits | 3 | $4.3M |
All 13F filers, Q2 2025 → Q3 2025: 3,317,429 shares bought and 1,212,156 shares sold, net +2,105,273 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 43 holders
| Healthcare of Ontario Pension Plan Trust Fund | 0.04% | No change | 2,000,000 | $20.3M |
| HGC Investment Management Inc. | 3.75% | New | 1,500,000 | $15.3M |
| AQR Arbitrage LLC | 0.53% | Reduce -0.8% | 1,490,205 | $15.1M |
| Glazer Capital, LLC | 0.45% | Reduce 0.0% | 1,194,892 | $12.1M |
| Sculptor Capital LP | 0.23% | Reduce -28.6% | 1,000,000 | $10.2M |
| Polar Asset Management Partners Inc. | 0.30% | No change | 1,000,000 | $10.2M |
| Linden Advisors LP | 0.96% | No change | 1,000,000 | $10.1M |
| Westchester Capital Management, LLC | 0.52% | No change | 995,939 | $10.1M |
| Alberta Investment Management Corp | 0.08% | No change | 980,000 | $9.9M |
| Picton Mahoney Asset Management | 0.10% | No change | 750,000 | $7.6M |
| Two Sigma Investments, LP | 0.01% | No change | 725,000 | $7.3M |
| Radcliffe Capital Management, L.P. | 1.35% | Add +142.5% | 650,000 | $6.6M |
| Magnetar Financial LLC | 0.04% | No change | 600,000 | $6.1M |
| D. E. Shaw & Co. | 0.01% | No change | 600,000 | $6.1M |
| Moore Capital Management, LP | 0.10% | No change | 500,000 | $5.1M |
| HBK Investments L P | 0.08% | Reduce 0.0% | 499,998 | $5.1M |
| Jain Global LLC | 0.07% | No change | 500,000 | $5.1M |
| Goldman Sachs Group Inc. | 0.00% | No change | 462,795 | $4.7M |
| Mangrove Partners Im, LLC | 0.38% | New | 450,000 | $4.6M |
| Periscope Capital Inc. | 1.12% | Add +89.5% | 432,800 | $4.4M |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.02% | No change | 400,000 | $4.1M |
| Berkley W R Corp. | 0.27% | No change | 396,960 | $4.0M |
| First Trust Capital Management L.P. | 0.25% | No change | 380,000 | $3.9M |
| Shaolin Capital Management LLC | 0.72% | Add +147.8% | 371,756 | $3.8M |
| Rivernorth Capital Management, LLC | 0.17% | New | 299,872 | $3.0M |
| Governors Lane LP | 0.35% | No change | 250,000 | $2.5M |
| Schonfeld Strategic Advisors LLC | 0.02% | Reduce -1.5% | 236,499 | $2.4M |
| Millennium Management | 0.00% | New | 200,000 | $2.0M |
| Gritstone Asset Management LLC | 2.12% | Reduce -1.2% | 197,656 | $2.0M |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) | 0.05% | No change | 160,000 | $1.6M |
| Toronto Dominion Bank | 0.00% | Reduce -58.6% | 150,000 | $1.5M |
| Mizuho Securities USA LLC | 0.03% | No change | 150,018 | $1.5M |
| Context Capital Management, LLC | 0.24% | Reduce -30.8% | 112,191 | $1.1M |
| Centiva Capital, LP | 0.09% | No change | 100,000 | $1.0M |
| Atw Spac Management LLC | 1.00% | Reduce -39.9% | 75,316 | $767K |
| Boothbay Fund Management, LLC | 0.02% | Reduce -39.9% | 75,316 | $764K |
| Wolverine Asset Management LLC | 0.05% | Add +4.8% | 66,628 | $675K |
| Verition Fund Management LLC | 0.00% | New | 56,098 | $568K |
| DLD Asset Management, LP | 0.17% | No change | 40,894 | $416K |
| Clear Street Group Inc. | 0.00% | — | 37,973 | $387K |
| Virtu Financial LLC | 0.01% | Reduce -34.9% | 13,112 | $133K |
| FNY Investment Advisers, LLC | 0.00% | Add +215.7% | 322 | $3K |
| Morgan Stanley | 0.00% | Add +23.8% | 78 | $790 |
"% of holder's portfolio" is AACB's weight in each manager's 13F, not the share of Artius II Acquisition Inc. Class A the manager owns.