Veragua Panama S.A. was formed in 1970. It was a type-C (and type-B) company mainly engaged in shipbuilding as a shareholder of Harland & Wolf Shipyards. 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.
Velosan Corp. was formed in 1986.
Upton Marine Panama S.A. was established in 1968. It was a type-B company acting as intermediate holding company. Along with Lewiston Shipping Panama and Woodbury Shipping Panama they were the co-founders of Omega Petroleum Industry S.A., a company whose aim was the management of the state refinery and the marketing of its products.
United Services Corporation was formed in 1975. It was a type-C company, engaged in real estate. The company was the tenant of the Geneva office and
United Marine Insurance Company Limited was formed in 1992. It was a type-E company acting as shipping agency.
United Investments Panama S.A. was formed in 1976. It was a type-D company mainly acting as intermediate agency in the field of cash management. It was the holding company of Athina Group of companies and owned several other companies such as Rhone Investments Limited (dividend from Corvallis), Evanston Panama S.A., Moreno Shipping Company and State Mercantile Company 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.
Union Shipping Co. Ltd. was established in 1965. It was a type-C company mainly engaged in shipping.
Union Cape Development S.A. was established in 1983. It was a type-E company mainly acting as shipping agency.
Ultramar International Cargo Inc. was established in 1960. It was a type-C company mainly engaged in shipping.
No bearing with the groups, on June 5, 1974 capital = 20.000$. Westchester Corporation Limited acts as a financing corporation to Trenton Inversion Company Inc., which is the owner of Maria Callas' flat in Paris, 36 Georges Mandel Avenue (July 11, 1977).
Transworld Trading Company S.A. was formed in 1956. It was a type-C company. It was an aviation company, (dormant). In 1976 undergoing change of ownership to Atol and A.S.O. equal holdings. In 1990 50% shares of the company belongs to A.S.O. and the other 50% belongs to Atol Group. In 1998 its parent company was Denton Marine Panama S.A.