3 institutions reported holding $7.1M of TSAKOS ENERGY NAVIGATION LTD (TNP-PB) in SEC 13F filings for 2026-03-31. Largest institutional holders: IMC-Chicago, LLC ($3.1M), SIMPLEX TRADING, LLC ($2.7M), GROUP ONE TRADING LLC ($1.2M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | IMC-Chicago, LLC | $3.1M | 79,100 | Trimmed |
| 2 | SIMPLEX TRADING, LLC | $2.7M | 69,500 | New |
| 3 | GROUP ONE TRADING LLC | $1.2M | 31,200 | Added |
Source: SEC Form 13F filings · as of 2026-03-31