Aristoteles Socrates Onassis Financiera Panama S.A. was formed in 1975. It was a type-A company (and sometimes type-B company) acting mainly as intermediate holding company. It was the stockholder of A.S.O. Naviera Panama S.A. and holding company of Alexander S. Onassis Foundation.
Arnheim S.A. was a type C company and was formed for rental purposes. The company was dissolved in 2001
Astoria Transportation Company was formed in 1973. It was a type-G company acting as passive company.
Barrow Holding Corporation was formed in 1986. It was a type-B company mainly acting as intermediate holding company. It belonged to Pinelands Marine Panama S.A. This new company was formed after the division of the Onassis assets and the restructuring of the companies to serve the needs of the Christina Onassis group, which was managed separately by OMSA and separately from the Alexander S. Onassis Foundation's companies.
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
Coventry Panama S.A. was formed in 1980. It was a type-B company mainly acting as intermediate holding company. In 1980 the company owns all the shares of Dover Marine Panama S.A.
Dahlgren S.A. was formed in 1980. The company was dissolved in 2007.
Falcon Marine S.A. was formed in 1959. It was a type-C company mainly engaged in shipping. In 1986 the company consolidated to A.S.O. Naviera Group, as from the forth clossing of accounts dated 31.12.1985. In 1990 the vessel Artemis Garofalidis belonged to A.S.O. Naviera Group.
Gardenton Corporation was a type -C company mainly engaged in real estate.
Harbel Transportation Company was formed in 1960. It was a type-B company acting as an intermediate holding company. 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 1987.