3 institutions reported holding $1.9M of CUBESMART (CUBE-PA) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($918,687), SIMPLEX TRADING, LLC ($731,768), GROUP ONE TRADING LLC ($214,758). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $918,687 | 23,100 | Added |
| 2 | SIMPLEX TRADING, LLC | $731,768 | 18,400 | Added |
| 3 | GROUP ONE TRADING LLC | $214,758 | 5,400 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30