Name of Subsidiary (and Name
Under Which the Subsidiary
Does Business)

Place of Incorporation

Interest held by Okeanis Eco
Tankers Corp.

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Ios Maritime Corp.

Liberia

100%

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Milos Marine Corp.

Liberia

100%

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Therassia Marine Corp.

Liberia

100%

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Anassa Navigation S.A.

Marshall Islands

100%

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Arethusa Shipping Corp.

Marshall Islands

100%

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Ark Marine S.A.

Marshall Islands

100%

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Moonsprite Shipping Corp.

Marshall Islands

100%

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Nellmare Marine Ltd

Marshall Islands

100%

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OET Chartering Inc.

Marshall Islands

100%

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Omega One Marine Corp.

Marshall Islands

100%

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Omega Two Marine Corp.

Marshall Islands

100%

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Omega Three Marine Corp.

Marshall Islands

100%

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Omega Four Marine Corp.

Marshall Islands

100%

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Omega Five Marine Corp.

Marshall Islands

100%

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Omega Six Marine Corp.

Marshall Islands

100%

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Omega Seven Marine Corp.

Marshall Islands

100%

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Omega Nine Marine Corp.

Marshall Islands

100%

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Omega Ten Marine Corp.

Marshall Islands

100%

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Omega Eleven Marine Corp.

Marshall Islands

100%

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Omega Twelve Marine Corp.

Marshall Islands

100%

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Omega Fourteen Marine Corp.

Marshall Islands

100%

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Theta Navigation Ltd

Marshall Islands

100%