Chester Navigation Company S.A. was established in 1957. It was a type-C company mainly engaged in shipping and owner of the vessel "Olympic Cloud".
Cartagena Shipping Company Panama S.A. was established in 1958. It was a type-C company mainly engaged in shipping and owner of the vessel "Olympic Valley".
Carlow Maritime Panama S.A. was formed in 1968. It was a type-C company mainly engaged in shipping and owner of the vessel Olympic Banner.After 1975 the company passed to the Christina Onassis Group of companies owned by ATOL and managed by OMSA. After 1999 the ownership of Christina Onassis Group of Companies passed to her daughter Athina Onassis. The management of the companies was still held, separately from the Alexander S. Onassis Foundation Companies, until 1999. The company was dissolved in 2000
Caribbean Atlantic Cargo Inc. was formed in 1956. It was a type-C company mainly engaged in shipping and owner of the vessel Ondine.