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

Place of Incorporation

Interest held by Okeanis Eco
Tankers Corp.

​

​

​

Therassia Marine Corp.

Liberia

100%

​

​

​

Milos Marine Corp.

Liberia

100%

​

​

​

Ios Maritime Corp.

Liberia

100%

​

​

​

Omega One Marine Corp.

Marshall Islands

100%

​

​

​

Omega Two Marine Corp.

Marshall Islands

100%

​

​

​

Omega Three Marine Corp.

Marshall Islands

100%

​

​

​

Omega Four Marine Corp.

Marshall Islands

100%

​

​

​

Omega Five Marine Corp.

Marshall Islands

100%

​

​

​

Omega Six Marine Corp.

Marshall Islands

100%

​

​

​

Omega Seven Marine Corp.

Marshall Islands

100%

​

​

​

Omega Nine Marine Corp.

Marshall Islands

100%

​

​

​

Omega Ten Marine Corp.

Marshall Islands

100%

​

​

​

Omega Eleven Marine Corp.

Marshall Islands

100%

​

​

​

Nellmare Marine Ltd

Marshall Islands

100%

​

​

​

Anassa Navigation S.A.

Marshall Islands

100%

​

​

​

Arethusa Shipping Ltd

Marshall Islands

100%

​

​

​

Moonsprite Shipping Corp.

Marshall Islands

100%

​

​

​

Theta Navigation Ltd

Marshall Islands

100%

​

​

​

Ark Marine S.A.

Marshall Islands

100%

​

​

​

OET Chartering Inc.

Marshall Islands

100%