Financial terms were not discussed. Tailwind said details would be disclosed after a definitive agreement is reached.
Tailwind said the 11 existing vessels in the deal are valued at more than $600 million and will form a dry bulk shipping company generating earnings before interest, taxes, depreciation and amortization of more than $113 million for 2009.
The nine vessels in development are scheduled for delivery in 2010 and 2010.
Nicholas Fistes, a GrandUnion principal and chairman, will be chairman and chief executive of the new shipping outfit, and GrandUnion CEO Michael Zolotas will become chief operating officer.
U.S.-traded shares of Tailwind rose 5 cents to $7.97 in afternoon trading.