3 institutions reported holding $4.7M of TSAKOS ENERGY NAVIGATION LTD (TNP-PB) in SEC 13F filings for 2026-06-30. Largest institutional holders: IMC-Chicago, LLC ($3.2M), GROUP ONE TRADING LLC ($820,584), SIMPLEX TRADING, LLC ($732,159). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $3.2M | 89,400 | Added |
| 2 | GROUP ONE TRADING LLC | $820,584 | 23,200 | Trimmed |
| 3 | SIMPLEX TRADING, LLC | $732,159 | 20,700 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30