3 institutions reported holding $145,950 of DIANA SHIPPING INC (DSX-PB) in SEC 13F filings for 2026-06-30. Largest institutional holders: SIMPLEX TRADING, LLC ($66,780), IMC-Chicago, LLC ($65,730), GROUP ONE TRADING LLC ($13,440). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SIMPLEX TRADING, LLC | $66,780 | 31,800 | Added |
| 2 | IMC-Chicago, LLC | $65,730 | 31,300 | Added |
| 3 | GROUP ONE TRADING LLC | $13,440 | 6,400 | Added |
Source: SEC Form 13F filings · as of 2026-06-30