Falmouth Marine Panama S.A. was formed in 1963. It was a type-C company mainly engaged in shipping and owner of the vessel Olympic Pearl. 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.
Glenarm Financiera Panama S.A. was formed in 1970. It was a type-C company mainly engaged in shipping and owner of the vessel Olympic Breeze. In 1981 the company belonged to A.S.O. Naviera Panama S.A.
Henley Finance Corporation was formed in 1976. It was a type-B company mainly acting as intermediate holding company. It belonged to Sandiland 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.
Holky Investors Inc was formed in 1985. It was a type-C company, engaged in shipping. It owns the second floor of a building located at 88 Avenue Foch, in Paris.
She was the younger sister of former First Lady Jacqueline Bouvier Kennedy Onassis and sister-in-law of President John F. Kennedy.