3 institutions reported holding $4.8M of ARTIUS II ACQUISITION INC (AACBU) in SEC 13F filings for 2026-03-31. Largest institutional holders: LMR Partners LLP ($4.3M), Clear Street Group Inc. ($564,543), UBS Group AG ($728). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | LMR Partners LLP | $4.3M | 400,000 | Hold |
| 2 | Clear Street Group Inc. | $564,543 | 52,761 | Added |
| 3 | UBS Group AG | $728 | 70 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31