3 institutions reported holding $344,400 of GLADSTONE COMMERCIAL CORP (GOODP) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($218,940), SIMPLEX TRADING, LLC ($108,240), GROUP ONE TRADING LLC ($17,220). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $218,940 | 17,800 | New |
| 2 | SIMPLEX TRADING, LLC | $108,240 | 8,800 | Added |
| 3 | GROUP ONE TRADING LLC | $17,220 | 1,400 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30