3 institutions reported holding $1.6M of CUBESMART (CUBE-PA) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($813,630), SIMPLEX TRADING, LLC ($564,410), GROUP ONE TRADING LLC ($238,225). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $813,630 | 22,200 | New |
| 2 | SIMPLEX TRADING, LLC | $564,410 | 15,400 | Trimmed |
| 3 | GROUP ONE TRADING LLC | $238,225 | 6,500 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31