Okeanis Eco Tankers Corp. (NYSE: ECO; OSE: OET) reduced emissions, completed efficiency upgrades in part of its fleet and expanded its vessel portfolio during 2025, as the crude tanker owner continued to invest in newer tonnage.
The developments were outlined in the company’s 2025 ESG report, published this week. The full report can be found here: https://www.okeanisecotankers.
The biggest change came after two equity offerings completed in late 2025 and early 2026. The capital was used to acquire 4 scrubber-fitted Suezmax resale vessels built in South Korea. All 4 joined the fleet during the first 7 months of this year, lifting Okeanis’ exposure to younger tonnage at a time when environmental regulation and fuel costs continue to influence investment decisions.
The company also used scheduled drydockings to upgrade 2 Suezmaxes, Nissos Sikinos and Nissos Sifnos. Both ships received silicone hull coatings intended to reduce resistance through the water, together with shaft generators that allow electricity to be produced more efficiently during voyages. Okeanis is evaluating the results before deciding whether similar work should be carried out on more vessels.
The report places more emphasis on improving the performance of existing ships than on betting on a single alternative fuel. Biofuel blends were supplied to 4 vessels in 2025 under certified programs compatible with FuelEU Maritime requirements. The company also continued using weather-routing software, voyage optimization systems and digital monitoring tools to cut fuel consumption. Two VLCCs retain LNG-ready notation, leaving open the option of conversion if commercial conditions change.
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